2 stroke outboard overheating. I have replaced the thermostat and water pump.

2 stroke outboard overheating O. they come from yamaha set on,off,on and most riggers cant remember it. Thread starter Keithh41; Start date May 1, 2024; K. I believe there are two types of overheat condition: First is temperature too high = the obvious one. No one in their right mind would pull the stat and PRV and leave them out. Runs OK all day at lower RPM (2000 RPM). May 1, 2024 #1 150HP 4-Stroke, around 80hours same Oct 1, 2023 · Reason 2: Overheating. The impeller, Popet Valve, Thermostat have been changed as well as cleaning out crud in the water lines. Customer: 1991 Yamaha outboard 200 hp (model TXRP), 2-strokes, engine would overheat and shut off after 6-10 minutes when on muff but not in the water. com/blog/yamaha_outboard_overheatingWHERE TO FIND US8755 S. Around 5800 rpms. replace them both. com FREE DELIVERY possible on eligible purchases Mar 21, 2011 · water pump would be my first guess but i had the exact problem with my 200 yammy 2 stroke. I got Suzuki's diagnostic kit and we scanned the engine for codes. 2004 25HP Yamaha four stroke outboard model number - F25ELHC Motor is mounted on a 16' 9" 2004 Smoker Craft - Motor has appr. The old one looked black and crusty but Apr 7, 2012 · Re: 2004 Evinrude 115 Direct Injection outboard overheating problems hey ! due to the engine history the overheating issue occoured occasionally at about 120 hours- never before and not some hours after this. I limped it home and replaced the impeller (the old one is 6 years old looked like new. New waterpump installed. this situation is baffling to me serial number- 0G269482 2-stroke 4 cylinder i have the same assumptions that you do that it may be something to so with the water pump. I need to know what else to check to Jun 16, 2003 · Well I sucked up a bunch of soft mud, and lost water circulation. Finally got to take it out (my maiden voyage). Aug 5, 2012 · Re: Yamaha 8hp 2 stroke no water coming out / overheating Blowing canned air through the water intake won't really do much help, but using a compressed-air through the pee-hole will work sometimes if their are bugs, spider webs clogging the discharge hole. The engine ran ok at idle but when opening the throttle to full, it was not getting all the power and eventually overheated, steam, hot smelling. today for the first time ever it sounded the overheat alarm. 2001 mercury 125 2 stroke is overheating. I just got my old 2001 yamaha outboard 6 months ago, taken it out , works great. 2005 Yamaha 90 hp 2 stroke overheat 2005 Yamaha 90 hp 2 stroke overheat. remove it. 450 hours Has been a great running motor for many years with nothing but preventative maintenance things completed each year as required. I'm stumped. If you have a Z300TXRC or a Z300TURC installed the motor will either be the correct shaft length (first model) or too long (second model). Previous topic - Next topic. <br /><br />He said he put a laser on the engine and knew that it was hot, and therefore not a sensor Sep 10, 2023 · The patient: 1983 Suzuki DT-5 two-cylinder, two-stroke 5hp longshaft outboard The story : This is the propulsion for our 19' trailer sailor. 10, 2010 By Rick Sieman. Overheating is another potential cause of intermittent beeping in a Mercury 115 2-stroke outboard engine. Have replaced impeller, checked thermostat is opening, pulled bottom leg off and had hose stuffed up water intake pipe and water seems to be getting up into cylinder head water jacket. Sent the boat in immeditaly for work. Feb 22, 2009 · the engine lately like clock work will alarm and start to loose pressure. now would be a great time to change the t-stats as well. when the engine gives a good pee and the thermostats Air Cooled Outboard Overheating If your outboard is air cooled then you would be forgiven for thinking that cooling water related problems wouldn’t be an issue you would need to deal with. I am new to boating. A quick run to just get wet. 3 reasons why you get an alarm on a Yamaha 2 stroke outboard1) Oil Check your oil level on the aux tank as well as under the cowling. It ran fine at lower rpms. Is not uncommon for the stainless steel cup in the pump housing to become skewed and partually block the pump output. Sal: Riptide23WA: posted 06-28-2007 08:58 PM ET (US) Aug 19, 2020 · Trying to help a friend out here. Back in 2011 the overheat alarm started sounding, replaced thermostats problem solved. It was in good shape. Outboard overheating is usually caused by a water pump failure, low engine oil, clogged manifolds, a damaged impeller, or thermostat failure. set the dip switches correctly. Nov 11, 2019 · Late last year I picked up a 2120 Parker Sport Cabin, powered with a 150 Yamaha 2 stroke (TXRA), all 2002. I’ve literally tried everything and reluctant to pull the head as Mar 2, 2015 · Hey guys seeing if anyone with some outboard knowledge could help me out here. It will over heat and go into slow mode after about 20mins of running. Water pump was last replaced in the fall of 2015. If I switch it to open it will run without overheating but it doesn't perform as well as I expected it to. Nov 6, 2024 · Is your two-stroke outboard engine overheating? This guide will help you identify and troubleshoot common issues to get your engine running smoothly again. Is it a 2-Stroke or a 4-Stroke? There are major differences between the two and huge deciding factors that impact why an outboard engine smokes. Jun 23, 2013 · I have a 2001 225 2 stroke Yamaha outboard. the alarm would sound because the the internal oil tank was draining faster than it was filling. Motor ran perfectly when idling along. There is a sending unit in the oil supply tank that could cause the same alarm to trigger. it's way of protecting itself as much as it can against being run after alarm has told you to stop. Mar 21, 2012 · Re: Running hot at Idle & Low Speeds - 90hp 2 stroke Yamaha You need to find a real mechanic. Jun. High rpm’s are not an issue and runs well. but i am not a boat mechanic at all and my mechanic friend has went MIA on me and im trying to get help anywhere i can. It will idle at 145 degrees all day but as soon as you raise the RPM's it gets hot and the alarm goes off. Slow down to idle Jun 12, 2008 · Hi Guys, I have a 1997 Yamaha 115 Saltwater Series Oil Injected 2-Stroke. You "NEVER" ever run your engine over 2000 rpms, while in neutral; on a 2 stroke engine, no matter what the reason or who told you so. If you suspect that your outboard motor is overheating, the first thing you should do is stop using it. usually happens below 1000 RPM. Jan 27, 2009 · I have a 1994 225 hp 2 stroke that was put in service last season after being idel for approximately 10 years. 0 Liter, 2. They are both overheating above 3,800 rpm. I am guessing I need to pull the head and water jacket and clean out and flush water passages. Unfortunately the overheat alarm did not sound, and while cruising at about 3000 rpm the motor faltered and died. Accessory Overload: High Electrical Demand: Excessive accessory use, such as trolling motors or fish finders, can overwork the regulator on Mercury and Yamaha 2-stroke outboards. I watched it Oct 11, 2017 · We have a 1999 Yamaha 60hp 2 stroke that sets off the alarm at idle. Oct 7, 2024 · 1994 Mercury 40HP 2 stroke outboard overheating. Alarm went off I slowly headed back to In this video we take a look at a Mariner / Yamaha 40hp 6E9 40M and look at how to remove and test the thermostat. We own various race patrol and workboats with about half a dozen 15 hp and the same of 40-60 hp outboards. I have 1998 90hp mercury outboard that is sounding the overheat alarm at full throttle than after I back off the throttle a few seconds later it goes off and than back on when under load again never goes off at idle can drive the boat 20 minutes at 5 miles and hour and no alarm only Jul 2, 2017 · I need help. Have removed cylinder head and exhaust covers and cleaned out all of the salt build up. (Over temp alarm flashing on display goes into safe mode) It will run 4100 rpm's all day long. Aug 4, 2012 · I have a Yamaha 8 HP 2 Stroke that is not getting a steady stream of water. On my most-recent trip with it, it was running fine but on the way home I went full-throttle and the overheat alarm came on. Water pump history is unknown (new to me boat) but is not supposed to be over a year old. However, sometimes the overheating issue is something as simple as a clogged component. The water pump seems to be working fine a steady stream out of pee hole. In this video I look at a Tohatsu 9. If that doesn't work then pull the exhaust cover to clean out water passages. Jul 2, 2022 · Im hoping you can help me with my problem as i have run out of ideas. The temp gage reads normal, water flow stream from engine is fine and engine does not feel hot. The temp alarm went off, I put it in neutral for a few minutes. so if impeller Dec 14, 2013 · I have a 90hp 2 stroke oil injected motor details( Yamaha 90AETO 6H1 L 1009809 P )think it may be a 1991? the alarm sounds when at idle after a minute or so, pumps plenty of water and will never happen if driving or sitting with revs up, I have had the impeller , thermostat & heat sensor replaced. But there are lots of factors that would raise and lower those numbers. Oct 1, 2024 #1 Customer: The overheating alarm on my 2000 Mercury 150XL SW 2 stroke outboard activates when I increase the rpm above 2000. Waited for about 20 minutes, restarted the engine and idled Dec 28, 2022 · This is another common cause of smoking and may be an issue with both 2- and 4-stroke motors. I installed a new thermostat and a new pressure control valve(for the first time)both had a good bit of mineral/corrosion deposits in and around them causing sticking and overheating. Having overheating problems. You also need to stand up in order to apply sufficient force to the pull-cord. Obstructed passage to the cylinder heads caused by foreign material (bits of an old impeller), salts, and sand. The gauges are working correctly steam is coming out of the exhaust just before I shut down the motor. 5 Liter High Performance For discussions related to 2. It sounds like your water passages are clogged up with either mud, silt, or salt. When I have the fuel enrichment set to normal the boat runs rough and will over heat after about 5 minutes. the pressure valve is under the 2 bolt cover at the lower stbd side of the exhaust cover with the large hose on it. opening. , and had overheat alarm issues. An overheating outboard can lead to en Re: Yamaha 90 2 stroke overheat? You need to understand how your cooling system works, firstly the water out the tell tail can be cool and the motor overheat, the tell tail indicates that water is pumping, however if the thermostat and or thermostat bypass valve doesnt open the water will not circulate through the power head and it will over heat despite water flow out of the tale tail. (Obstructed water tube near power head or distorted water tube gromet) 3. Pee stream is solid. The boat weighs buggerall, one person can lift it. It has a new water pump and thermostat and the problem still exists. After a faster idle the alarm goes off and at high rpms running wide open the water stream is cool and no alarm. There are 4 small bolts/screws that you remove,2 in front, 2 in the back, then tap the lower half gently w/rubber hammer. We asked 3 time AMA pro mechanic of the year, multiple SX/MX championship winning crew chief, and Millennium Technologies Technical Manager, Tom Morgan to put together brief guide on two stroke detonation and how to prevent it. Once the motor has cooled down, you can try identifying the cause of the overheating. 8HP two stroke outboard that is overheating for a relatively uncommon reason compared to water pump and thermostat proble This article delves into the technical aspects underlying these variations and provides insights into maximizing the longevity of these engines, including popular models such as the 2. We'd idle for 20 or 30 seconds and the alarm would go off. 5HP Outboard Motor 49cc Outboard Boat Engine Manual Start 2 Stroke Small Boat Motor with Water Cooling System for Inflatable Kayaks (5000r/Min): Outboard Motors - Amazon. My buddy, to be on the safe side, changed waterpump, thermostats and sending units. Hoping not to have to pull the head, but if I do, it doesn't look that hard. clean the valve pocket and replace the grommet and do the pumpo. 0 Liter, 3. I start it once a week every week for a 5 minute idle. The motor will run great all day long under 2600rpm, but once I try to run it at a normal speed higher than 2600 it's not long (about 2 minutes) that the tempature alarm goes off & I have to shut it down to cool. Mar 21, 2022 · As title says, my 2002 Mercury 60hp two stroke has just started overheating at idle. Just a bit slower and all is fine. Motor is peeing the whole time. Opened up to plane in the bay and immediately overheated, no water from the tell tale. The number one cause for overheating boat engines is a problem with the flow of water to the engine. I have put the motor down in a trash can full of water with Jun 30, 2016 · Hi, I have a small planing catamaran with 2 x 90 Yamaha outboards of 2006 vintage. 2004 115 2 stroke Apr 4, 2017 · original post that never posted : After months of repairs , took the boat out last Sat. Motor has been at me for 15 years with no major problems. There are many reasons why you could have an overheating problem on your boat. 0 Members and 1 Guest are viewing this topic. 2 Liter, Optimax, 300X, 300XS, XB, Pro XS, Pro Max, and Black Max. We were out fishing and couldn't run at high rpms without the alarm sounding. At about 26 knots. Check the oil sensor ( I have a brand new 115 HP 2stroke with 9 hrs on it. you say the impeller had JUST been changed but also said had been run three times. Mar 9, 2017 · 2005 Merc 150 2 stroke carbed So last time I was on here I was hoping you guys were right, and letting the temp get past 143 would open them up and it would start pissing like a racehorse, so this morning I took it back to the dock (hoping to fish) and let it get up to temp and the telltale Apr 19, 2022 · Your 2 stroke may bog when you give it gas if the engine is overheating, has too much oil in the gas mix, has low octane gasoline, or has a dirty air filter. Had the engine descaled with Rydlyme for two hours, thermostats changed, popet valve cleaned. Many times when just idling under 1000 RPM it will overheat. Trying to replace 2 stroke chrsler/force 150hp outboard with a 4 stroke mercury outboard. After about 7 hours of boating on the Potomac this past Sunday, I got the overheating warning sound. Oct 19, 2022 · Why Is My Outboard Overheating? Signs your outboard is overheating are a hot dash gauge, weak engine, slow start, or steam coming from the engine. Seizure is an easy thing to recognize. I have a 2003 90 two stroke that overheats on plane. the manual also has a couple of pages on troubleshooting. Some research on forums mentioned thermostat, poppet valve and impeller. The motor shouldn't be allowed to keep overheating, because permanent damage can occur. In freshwater cooled inboards, the impeller is isolated from that part of the cooling system. Sep 23, 2021 · Hi, I'm experiencing an overheating problem with my Yamaha 60 2 stroke outboard. I've tried pretty much everything from the list of basics but cant find the problem. allows you to get back in if you have NO alternative. so its easier to state just fact. No water pressure Guage right now. Also, fouled or loose spark plugs, a malfunctioning stator, damaged wiring, or incorrect timing can cause bogging. Think it was a combination of cleaning out the salt build up in the cylinder head & exhaust and replacing the impeller and a new water pump housing. The Evinrude motor uses water to perform the cooling function. May 6, 2021 · Have a temp alarm going off on 2007 90tlr 2 stroke. The Merc 60 impeller sits on a St St baseplate. Jul 21, 2015 · Like the title says, I have a Tohatsu M70A2, 70 HP 2 stroke, that is overheating. It has a brand new water pump, thermostats and poppet. He pulled the waterpump and didn't find anything wrong. maybe a general blocking in the water passage occoured. A big one is how often the motor is run. Ran the boat in the bay and my suspicion was confirmed, tach gave the overheat horn Jun 11, 2019 · The most common mode of failure for 2-stroke engines is detonation. Jul 1, 2006 · Re: Mercury outboard overheating The easiest way to access the poppet valve is to remove the lower part of the cowling. Now,2013 alarm sounding off again, this time replaced water pump complete change. I have check to see if the out hose is block and it is not. Here are ten tips to optimize performance for this type of engine: • Propeller Selection: Choose a high-performance propeller that matches your specific performance goals and boat configuration. 5 Liter, 3. W. I have checked an replaced the impeller. All Yamahas and all 4 stroke. Customer: hey, i have a 2000 mercury 40hp 2 stroke and the overheating alarm seems to be beeping even when its cold, the impeller and thermostat have been replaced and water flow out of the outboard tell-tale is cool even after running for a period of time. i dont know the conversion and Jeff G. I have used the boat last weekend Sat- Sun and this weekend Sat-Sun. The symptoms are classic: You fire up your bike early on Sunday morning, and take it out for a warm-up ride. Takes the boat out to see what happens and after 5 minutes, the alarm goes off. Jun 29, 2011 · Re: 1997 mercury mariner 40HP 2 stroke over heat alarm I have a '95 40 hp ELPTO, 2 stroke, 4 cyl, serial # 0G185067. i took the cover off and the t-stat cover was too hot too touch. Aug 5, 2018 · Hardly anyone wants to tell us what motor they have. With either the outboard or inboard installation, after a severe overheat, the thermostat should be replaced as they are quite frequently damaged during an overheat event. Two Stroke engines burn oil. The port side scanned 192 degrees and the starboard side 132 when the alarm went off. I do not know where to start on a boat motor and I need some help, please. Jun 3, 2023 · A proper fuel mixture for a 2-stroke outboard engine typically consists of gasoline and 2-stroke oil, with a ratio between 50:1 to 100:1, depending on the specific engine model. Thread starter ROBJABLONSK; Start date Oct 1, 2024; R. This plate is completely solid except for the water intake slot. Went out first time since, alarm sounded off about 20 minutes into trip. May 18, 2015 · I have a 1985 Mercury 150 Black Max that is overheating as soon as you put the power to it. I can only imagine this is the overheating alarm as it's using the oil no problem. Jan 14, 2018 · To bad gauges don't work that would help some too. i just feel the head is not getting filled like it used too before Mar 28, 2006 · The problem is the overheating alarm goes off yet the motor is not overheating. Consider factors such as diameter, pitch, and material to maximize Sep 21, 2021 · 2001 Yamaha 70hp 2 stroke overheating at idle, fine at 1000 rpm new impeller kit, head gaskets Mar 22, 2024 · Buy Knwigoe 3. I have the boat for 6 years engine is 150 2 stroke. Well I guess when I turned the water on full blast, the ear muffs popped off, and like a dummy I didn't notice. What Causes A 2 Stroke Engine To Overheat? The most common reasons for a 2 stroke engine overheating include: Obstructed or impaired cooling system; Inadequate or poor quality lubrication; Insufficient Air Intake; We will walk through each of these so that you can see why they contribute to overheating and how to deal with the underlying issue. Joined Oct 1, 2024 Messages 5. An overheating engine can be caused by a variety of issues such as a clogged water intake, a damaged water pump impeller, or a failing thermostat. Started Jul 18, 2016 · Yes, as far as it seems to me, the overheat issue is resolved - no more alarm, tell tale is shooting water, engine doesn't appear overheated and not shaking vigorously anymore. Jun 11, 2009 · I have a 2004 30 HP 2 Stroke that is overheating. Jun 9, 2016 · Re: overheat indicator on 2007 yamaha 90TLR on the back of the tach look for a rubber plug. Outboard motors use raw water cooling, and because they have a literally unlimited source of relatively cold cooling water, the designers of outboard motors try to employ various methods to raise the engine operating temperature into a reasonable range, typically around 165-degree-F. Keithh41 New member. What causes an outboard motor to overheat? There may be a problem with the engine itself, but most likely, overheating will be caused by a clogged cooling system. First, as zeno notes, make sure that the float is in good condition and can move up and down freely in the oil. I scanned the heads with an infrared scanner. Then it very easy to get at the poppet. May 1, 2024 · Mercury Outboard 150 Overheating. I looked around and noted smoke coming from under the cowling (1989 Force/US Marine 125)Got a tow in and the mech at Jul 14, 2010 · 2. My marine mechanic has replaced the water pumps, removed the thermostats, and removed the heads and check for water passage restriction (there was none). We hope its helpful. Jun 16, 2024 · Tuning a 2-stroke outboard engine for high performance requires expertise and careful adjustments due to its specialized nature. I can only flush using a two-sided muff because a one-sided muff results in overheating after 3 minutes. 129th Street Oct 4, 2015 · Have a 1997 70 HP Yamaha 2 stroke. Mercury - 3 Liter & 3 Liter High Performance For discussions related to 3L Two Stroke motors (XS, ProXS Optimax, EFI, or Racing) Mercury - 4 Stroke / Verado Apr 27, 2022 · 2006 90 horse 2 stroke 900 hours. So I changed both thermostats but now motor overheat alarms are going off but after 30 minutes of running at 2800 rpm. It runs great with lots of water pissing but the overheat alarm goes off when under load or high RPMs. Used the boat twice this summer with no problems, until a few weeks ago i drove into a bay and reduced the speed, after I have a 225 2 stroke, has been out of the water for about 6months and when I put it back in a week ago it would overhead at random times on the way out to the reef mainly when we would go through some rough water. Check the owner’s manual or consult with a Suzuki dealer to determine the correct fuel-to-oil mixture ratio for your 2-stroke outboard engine. I'm trying to better understand the problem (and make sure there is actually an issue). Continuing to operate an overheated motor can cause irreversible damage. Sep 24, 2022 · 4 Common Reasons Why Your Yamaha Outboard is Overheating (305) 251-4067 Map & Hours Contact Us Toggle navigation. Oct 4, 2015 · Finally got the boat in the water, good news is the overheating problem seems fixed. mode. Like the people above, I have an alarm that goes on erratically, even when the oil tank is full and the engine is not overheating. turns out the oil filter was clogged. May 20, 2019 · I have a friend with a DF25A on his small boat, about one year old. May 22, 2011 · Re: 90 Yamaha 2 stroke overheating Before you get to deep, go back to the beginning. Have replaced the Impeller, tested the stats. Feb 11, 2007 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. I tried to flush with water/vinegar. I have replaced the thermostat and water pump. The water passage is next to the exhaust passage, as RPM raises, exhaust bleeds into the cooling system, water pressure remains about the same bby cooling is radically reduced until engine speed (and exhaust pressure) falls low enough for full water flow again, and the engine cools. Idled around fishing for about 2 hours with no more issues. no water was coming out of the exhuast holes in the shaft. Slow down and buzzer goes off. Yamaha 90 2 stroke Jun 29, 2019 · I never did anything on a small 4 stroke water cooled motor before, but on larger 2 strokes I dropped the lower unit , hooked up a water hose to the pipe up to the powerhead, and pulled the stat out. Sep 10, 2023 · when a small two-stroke outboard gets overheated, what damage is likely or possible? has anyone experienced similar, and were they able to diagnose and repair such damage? or did they find that the repairs were uneconomic? An outboard engine overheating is a serious problem that needs to be addressed immediately. While triggered by overheating from a broken water pump, I assumed that since the alarm continued to sound even with engine off that it was an electric issue. Jan 22, 2013 · Dirt Bike Tech: Two-Stroke Seizure. it han be a simple thing like a stupid block water intake in the lower unit. The motor is 1998 c115. Thread starter Snakeriversailor77; Start date Oct 5, 2015; S May 14, 2001 · 1992 115HP Yamaha. Whether its in neutral or low rpm idle, after a few minutes the water coming out of telltale gets significantly warmer and the alarm goes off. Tested each cylinder during overheat alarm and they read around 140 temp. Can anyone tell me any of the following: Where is the alarm module located? My 2000 150hp TXRY 2 stroke goes into visual alarm [have no audible]and shunt of rpm when I get into the plus 4000 rpm's. Jan 14, 2021 · Hi everyone, I have an old 70HP 2 stroke (1997), it runs great but on my last 3 trips I had the overheating alarm buzzing. I changed the thermostat, and am still having the same problem. On the tach with the temperature there is a warning light blinking but the motor does not shut down to 2000 RPM like the manual says it would do if it does overheat. Dec 12, 2020 · Top 7 Reasons Your Boat is Overheating & How to Fix It . water at the pisser was flowing fine but so hot it burned me. I did this twice and it worked like a charm but within 10 min. The cooling system in your outboard’s motor is what to look at if you’re experiencing overheating issues. The water stream is strong. L. 4/ 2. On two occasions, his engine flashed an overheat warning. That is just a fact of life. have also run "salt away" through the motor Jun 3, 2008 · 2000 Mercury 115 overheats when pulling tubes or running over 3500rpm. Went to go to a different spot about 2 miles away at 3/4 throttle and the boat started running rough after about a mile and a half and the overheat warning buzzer came on. . The boat only had 400 hours on it and it ran great during the sea trial. Has good compression, runs great in a barrel but it seemed like it was running hot so I gave it an extensive vinegar treatment to try to remove excess salt buildup. Aug 19, 2003 · Re: overheating 115 yamaha 2 stroke In addition to overheating, not having any oil in your tank could also cause the problem. As soon as I turn it off, the remaining water comes out very hot. <br /> the valve looks like a small t-stat Aug 16, 2020 · Hi All, I'm after some tips from the community as my Mercury 2001 3cyl 50hp outboard is overheating when in neutral? Interestingly it does not overheat when on the hose at home (more water pressure I assume), or when moving along, it only gets hot when idling in neutral. I let it settle for a minute or so off and then I'd start it Aug 15, 2021 · TWO STROKE models (Less than 135 hp). Aug 11, 2013 · Need some help. Running around 4500RPM - Engine runs all day long! At WOT (5400RPM), after about 5-6 mins the over-heat alarm comes on and goes into limp mode. The pee hole is good and strong, water temp from the pee hole is normal. So if you want to learn about outboard motor overheating Jul 1, 2006 · Re: Mercury outboard overheating Many of you may have the same gasket failure under the powerhead. We've just pulled out the thermostat, a lot of gunk in there but when chucked in hot water it opened. ) I replaced the thermostat. New impeller kit. Aug 9, 2013 · hey guys, i have a 1989 90 hp yam 2 stroke. . 5L Two Stroke motors (Carb, EFI, Optimax or Racing). May 30, 2023 · Overheating in a Mercury 2 stroke outboard could be caused by a clogged or damaged water pump, blocked or damaged cooling passages, or a faulty thermostat. Yes, I managed to start it in gear at max throttle. The background is that I have been assigned to the watercraft committee at the co-op boat club I belong to. This seems like a very short time for it to cool if it was overheating. The cup has 2 tabs pressed into it to index with the plastic housing. Jan 20, 2018 · I have a 2002 90 HP 2 stroke and owned it since 2002. if the valve leaks at low speeds it causes a low water condition at the top of the block. I have changed the impellers and thermostats, checked the alarm sensors and they close at the right temp. Clogged Raw Water Strainer. This thermostat has a nasty surprise for us I need help. I have a 2006 2-stroke 90 hp. Home Engines Engines Repower Yamaha Outboards Jul 7, 2013 · I have a 2000 2 stroke 150 that keeps overheating. I believe it's a 2001 model. Only over heats at wide open throttle. Jun 24, 2012 · My motor is also a 1999 Yamaha 90C, and the temp alarm went off just a few weeks ago for the first time since I bought the motor new. Mostly no wake zone and a short faster run. In many cases this would be true, but bear in mind that just because the engine itself isn’t water cooled, doesn’t mean that other components such as Oct 5, 2015 · Yamaha Outboard Forum . Shut the motor off for about 20 minutes before restarting. I have notices that when the engine runs at idle the pilot stream is very weak and only improves at engine speeds above 1800 rpm or after warming up (but only on an intermittant basis). ericsoutboard. Jun 13, 2020 · Hello. 4 Liter, 2. Mar 3, 2010 · Re: average life of a two cycle outboard motor Wow! that is quite a question and sure to result in many opinions. Jan 11, 2013 · Re: 1995 mercury 40hp overheating. Sep 27, 2005 · Re: Mercury 60 HP Two Stroke Overheating: Hi Andy,<br /><br />Finally got the outboard fixed. Loss of engine power is an indication an Evinrude outboard motor is overheating. It contains two switches. <br /><br />I was having a simular problem and all it ended up being is that the battery connection was lose and the sending unit wasn't receiving the proper voltage to register Jul 21, 2021 · New to me motor that sat a year before I installed it. Lightly used, mainly to get in and out of harbour; but Advice sought - overheated two-stroke outboard - Cruisers & Sailing Forums Sep 23, 2021 · Hi, I'm experiencing an overheating problem with my Yamaha 60 2 stroke outboard. Other indications include a warning horn and a "Water Temp" light. Dec 24, 2017 · I would inspect the oil tank sensor. <br /> good luck and keep posting<br /> ps we dodged charley Mar 13, 2012 · On outboards this can also be a common point for the impeller parts to get stuck. I've already removed the Cylinder head cover and cleaned all deposits Mar 27, 2004 · Hi,<br /><br />One of the two 1997 Yamaha 2-stroke 200 HP Saltwater Series engines on my 25' Grady White Sailfish overheats and powers down. Water tube not blocked. I have always heard 1000 hours for a 2 stroke and 2000 hours for a 4 stroke. Very unusual problem, took him apprx 5 hrs to find it. Not a 2 stroke user but just because an oil tank has oil it may not be getting enough through to the engine at rpm's. sw1on,sw2off,sw3off. some of this dance everyday trying to get the whole story. In this video, we're going to talk about the common causes of overheating in 2-stroke engines and how you can prevent them by controlling and monitoring your Jan 18, 2009 · Hi, I have a 90 Yamaha Outboard two-stroke and it is not peeing out the back? It is a 2004 model with not many hours, runs perfect, just not peeing-spitting water out the back. Water passages not shown before, once I got it all together this motor is running super cool! Apr 7, 2019 · Baffled By Overheating Motor Problem (Yamaha 70hp, 2 stroke) Started by AJFishin, April 07, 2019, 06:07:59 PM. What Type of Outboard Do You Have? The key to this portion is understanding what type of engine you have. Mercury - 2. Feb 3, 2022 · If you have overheating problems on your outboard, you could be headed for bigger problems unless you take care of it. 0/ 2. Oct 23, 2013 · My 2006 F250TXR overheat alarm goes off after a few minutes at low rpm but not at rpm over about 900. Check these components, remove any debris or buildup, and replace damaged parts to resolve the issue. Yesterday I dropped it in the water and idled about 20 minutes through the back channel. Hey, it is gray, isn't that enough? The boat has a 25" transom. The engine quickly overheats. This is what happened in my last 3 trips: 5-10min after launching the boat and running at low speed (8kn zone), the Jul 24, 2011 · My fishing buddy is having a similar problem with his 200hp Yamaha 2-stroke. Under Aug 13, 2016 · Not sure if this should be a new thread or a continuation. Crank boat in water and within 3-5 mins the temp alarm goes off. My 225 2 stroke is overheating. With the lower off you can try a back flush through the therm. It doesn't matter is if it running WOT or at an idle, it will do it at both ends of the spectrum. Apr 1, 2012 · Re: 1998 Force 120 Overheating Re: 1998 Force 120 Overheating Sounds like a water flow restriction as already stated. A look at two-stroke engine seizure and why your piston can lock up solid. Some water does come out the outlet tube, but not as much as used to when it was new. After the summer, I intend to do a full service on the motor, when I'll look inside from the T-Stat. After 2 miles, the motor started running rough and the warning buzzer went off. May 4, 2016 · I know what you mean - the decrepit 40hp 2-stroke on the Contraption has a bit of a dodgy gearbox, and needs max throttle or thereabouts in order to start. When throttling up to about 3000 RPM the tell-tail (pee stream) stops. Also before all of that check the exhaust plate cover for any missing or loose Aug 18, 2019 · The background is that I have been assigned to the watercraft committee at the co-op boat club I belong to. I just bought a "rebuilt" Yamaha 70hp 2-stroke. Jun 15, 2018 · Up to now, I haven't been able to run the motor hard, so never knew I had an overheat problem. I always have flushed it with fresh water and never had a problem until last 5 or 6 trips. it ran fine in the river , but back at the house i was flushing it and the alarm went off. i cut it off Jun 10, 2021 · 4 COMMON REASONS WHY YOUR YAMAHA OUTBOARD IS OVERHEATINGhttps://www. Sand, salts or foreign material occluding the water jackets prevent water from circulating around both cylinders. ROBJABLONSK Recruit. During the first few months of use I would occasionally get an overheat alarm (no real pattern when it would come on), I would shut the engine Jul 31, 2009 · "I have a 2000 Mercury 50horse "I have a 2000 Mercury 50horsepower 2-stroke outboard engine. They open at 130-135. They are in the motor to make sure water flows to all parts of the motor properly at all RPM, without them in place you will have hot spots and cold spots. The motor is peeing cold, but the stream is strong. The first time i ran through some sargassum weed when it started to overheat. A marina did replaced the water pump. The impellor was new 6 months ago and upon checking looks good, also the water pump assembly in general looks ok. I figured if blockage then low RPM would be May 17, 2015 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. the beep seems to be coming from the throttle controller. Mar 23, 2019 · Hello. Had to get outboard specialist to look at it. If your engine is overheating, it will likely produce copious amounts of white smoke. The friend ordered a new overtemp sensor but what he got appears top be a temp sender for a gauge rather than the overheat switch. Put boat in gear and after few minutes the alarm goes off, back to neutral and then back in gear and the motor runs fine, alarm will not come back on unless motor is shut off and Mar 23, 2015 · Need some help trouble shooting a over heat on a 2005 yamaha 90hp 2 stroke. It does not cool down after it gets hot. A few weeks ago I took my 1990s 25 hp 2 stroke to a boat repair mechanic after the engine was overheating. please forgive my lack of etiquette. 42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance Aug 15, 2004 · Re: 1994 -225 2 stroke yamaha overheating your water pump is way overdue mon. Aug 31, 2010 · I have a 200 hp Yamaha 2 stroke 1995 i just brought it and she over heats when you get into it after only about 5-10 min i have removed the leg and there are no blockages in the pick up so far i have replaced head gaskets (no blokages in heads or bores) water pump impeller (no excessive wear on plates oring sealing) Nov 22, 2024 · Overheating: Poor Ventilation: Inadequate cooling or improper mounting of the rectifier can cause overheating, common in OMC and Yamaha 2-stroke outboards. the alarms are different for 2 and 4 stroke and the digital tach comes preset for 4 stroke. I changed the water pump, thermostats and PCV. One closes when the float is up and one closes when the float is down. Any thoughts Apr 3, 2019 · After 15 minutes or so, I increased the speed to approximately 3/4 throttle and the boat ran good for about 2 miles. when tested with infared heat gun. after you shut it off for a few minutes it would fill back up and start again without an alarm. Today I took a can of canned air and tried to blow out from the input where you normally put the muffs and also from the output direction. Here are a few reasons why your boat may be overheating and how to fix it: 1. Thanks John Aug 15, 2005 · Re: YAMAHA 150 2 STROKE OVERHEATING I take it thats a negatory on the pressure control valve and grommet service?<br /> dont make us dance. It always had an issue that when in gear at low rpm, like idle or under 1000 RPM, it will overheat. Despite replacing the thermostat a month ago and addressing a similar issue by changing the poppet valve six years earlier, the problem persists. If engine is cut off, alarm stops and does not come on for a minute or so when restarted at low rpm. Water appears to be comin Apr 16, 2023 · Hi All, Longtime lurker seeking help! I have a 2002 TLRA 60 HP with very low hours (70) that gets the over heat alarm at low RPM’s after 7-8 minutes regardless of it’s on muffs or in the water. A few months ago got a old boat. turned on the water full blast and shot compressed air into the water hose every so often to help move things around inside. Thermostats looked OK, Overpressure valve in good condition. 1st time was at WOT , shut boat down immediately for about 1 minute , restarted and everything was fine until the same thing happened at idle speed in a creek. Back down Apr 1, 2019 · Went fishing today. ( i used a home made If the overheating siren on your 60-hp 2-stroke outboard keeps going off, even though the engine is pumping out water as usual and there is little smoke, there are several potential causes for this issue. Apr 6, 2013 · The motor is a 1996 Mercury "Classic", 40 HP, 4 cylinder, 2 stroke; serial is 0C268772. <br /><br />He said he put a laser on the engine and knew that it was hot, and therefore not a sensor Sep 6, 2010 · Re: 2005 Yamaha 225 overheating ok, the engine running fine up to, as you say, just over idle, means it had gone into S. it took me two boat mechanics, 3 new impellers, and HUNDREDS of dollars to . At least there are no valves and timing to deal with. I have a Yamaha 50 HP 4 stroke outboard F50DET. When I came home this time, I put on the eat muffs to clean out the saltwater, and run the motor. Water was pumping great and no problems. Jul 22, 2023 · I have a 2005 Yamaha 90 2 stroke that overheats after 4300 rpm's. azwg dyeguec xqjuh xxt lmv xsmeq qgkvlr opog iprsm kgjg