Smart thermostats are all the rage right now—and for good reason. It can also cause the water to come out of the exhaust, creating an idle issue . Also, overcooled engines, run inefficiently. It mixes the right amount of fuel and air for combustion, with the mix being sucked into the engine by a vacuum. I surfaced all of the reed cages and torqued all screws to specifications on the reeds, reed cages, and air handler cover. a malfunction can result in a trouble code, generated by the engine's computer, which can turn on your check engine light. What Causes an Outboard Motor to Overheat? - Boaterrific ^Click to enlarge^ The two things that need regular maintenance or may cause problems are the impeller and thermostat. 4 signs of a bad or failing thermostat symptoms and how to ... Typically, a thermostat in the choke will sense increasing engine heat that is being transmitted to the choke housing, and cause a bimetal spring to relax and open the choke valve. outboard of bad Symptoms reed valves [AQVT38] have a low hour Yamaha 250 which I just purchase on a Grady but have noticed it making oil. If that valve is sticking open, it could certinly cause your symptoms. Sloppy, incomplete, or top-end builds done The symptoms are loss of power, owing to the valve lingering open at the end of the exhaust stroke, and . If your car is running unusually cool and not building up any heat in the engine, it's likely that your thermostat is stuck open and is letting too much coolant through. Removed thermostat from outboard. Thoughts? | SailNet ... That is made possible by having the proper engine . Okay, I have a 1978 Evinrude 55hp. No longer will you need to experience a reed-related inefficient engine or rough idle. Stuck open means too much coolant is being allocated to the engine, causing the engine to be abnormally cool. Can a stuck open thermostat cause power loss ... 1-Stuck Open Thermostat. We are trained to think that the heart of the cooling system is the water pump and it should be checked and changed annually . Your vehicle's heater works in conjunction with the engine's cooling system. If you want a way to check . What problems can a stuck open thermostat cause? Yam F4A. Stuck open means too much coolant is being allocated to the engine, causing the engine to be abnormally cool. The solenoid on a Mercury outboard motor is used to actuate the starter. Thermostat stuck open: When the thermostat is stuck open, the engine temperature drops below normal when driving, especially on the highway in cold weather. A stuck-open thermostat can also cause lack of heat from the heating system. 3 Ways to Tell if Your Car's Thermostat Is Stuck Closed ... Temp sensor and thermostat issue. Sometimes we encounter our outboards not running properly. Messages. If your car is running unusually cool and not building up any heat in the engine, it's likely that your thermostat is stuck open and is letting too much coolant through. An overheating issue on my 1991 Evinrude 30hp it will not be able to get noticeably hot functioning.! Unfortunately, sometimes your thermostat can get stuck in either the open or the closed position. Is it OK to run without a thermostat? As the thermostat heats up, it should open. Symptoms of a bad thermostat Thermostat stuck open: When the thermostat is stuck open, the engine temperature drops below normal when driving, especially on the highway in cold weather. Last year I had trouble with my F90TLR running rough on fast idle and then stalling when put into neutral (termed: the "issue"). 10 Can a 2 stroke engine be run without the thermostat? F150 Thermostat & Cover Gasket $ 35.01. 7% positive. While you would see the water coming out of the prop hub even before you start the motor, you aren't likely to see any pee stream until the motor, and hence . 9 What happens if the thermostat is stuck on my outboard? Diagnosing a Failed Outboard Thermostat. Give all grease points a few squirts with the grease gun twice a year to prevent this happening to you. It is rare that a thermostat goes bad, but it does occasionally happen. For a more accurate test, measure the temperatures of the engine and the hose leading to the radiators to see if they're similar. 4.4/5 (39 Views . 13 Votes) Yes, you can temporarily run your outboard without the thermostat and not harm the engine. When you turn the thermostat up or down, you should hear a click. Found the cause was that the thermostat was stuck open, I had no other symptoms and without a temperature gauge I had no way to know if the engine was running cooler than normal. Your vehicle's heater works in conjunction with the engine's cooling system. Step 1: Remove the thermostat from the motor. 2 stroke outboard blown head gasket symptoms. However, these new 2 cycle oils burn very clean so lets not worry about that. Also Know, is it OK to drive with a thermostat . Does an outboard motor have a thermostat? 4 signs of a bad or failing thermostat symptoms and how to check and testThis video is for the following repairs:How to tell thermostat is bad,How to tell th. For other non carburated 2-Strokes it can cause a high idle. Its function is more complicated than most people realize. Found the cause was that the thermostat was stuck open, I had no other symptoms and without a temperature gauge I had no way to know if the engine was running cooler than normal. Yes, you can temporarily run your outboard without the thermostat and not harm the engine. Owner manual ; Safety goggles ; Writer Bio. The other engine has now been in service for ten years and 510 hr. For 2-Strokes, it can cause a rough or poor running condition. This occurred at seven years of service years and about 350 hr. Common Symptoms Of A Bad Thermostat. That's what happens whenever a thermostat sticks in the open position, which is the usual way that they fail. How To Check An Outboard Thermostat. It may also cause poor fuel mileage and the heater to blow cool air. That could also cause your problems. The motor ran fine (Oct to May) all last winter in fla. Let's start with the water pump itself . Getting through the current problem and getting back on the water without harming your engine is the end goal to all boaters. Jump to Latest Follow 1 - 19 of 19 Posts . Easy enough to rule out, and not bad to replace anyway. Which leads to, increased fuel consumption and higher emission levels. Check the reed valves on the affected cylinder if you can, also look for air leaks, check the check valves on the crankase oil scavenging pipes if fitted. 02-09-2017, 12:26 AM. Reduced Fuel Economy. Running Outboard With Stuck Thermostat? Yamaha VF200 VF225 VF250 Outboard Thermostat $ 47.63. However, if the thermostat gets stuck in the closed position, the coolant can't flow through the radiator and can make your engine overheat. Author: Stuart Buckingham Date Posted:27 June 2019 If I were to ask you what the five most important things to check when servicing an outboard were most would rate a thermostat pretty low and some, in fact, wouldn't even rate it. Your vehicle's exhaust system can provide you with several indications of a blown head gasket. There is a lot more to an outboard motor cooling system than just an impeller and a couple of gaskets. Most outboard thermostats are factory designed to open at approx. Thinking it was a fuel supply issue, I gently squeezed . When the thermostat stays open the . Erratic . How do I know if my outboard thermostat is bad? No, you can not remove the thermostat and continue running the engine for long periods of time without causing harm to the engine. It takes considerable . Most vehicles use an automatic choke. Common Symptoms Of A Bad Thermostat. Replaced Water Pump 150HP XR2, XR4, Magnum, Marathon (vertical reed blocks) 5432022 . Feb 5, 2012. It is very helpful to . luxury car - model toy car image by alma_sacra from Fotolia.com. General Q & A - Mercury Racing blue motors: 500EFI, 525 EFI, 575 SCI. View digital . A stuck-open thermostat can also cause lack of heat from the heating system. Symptoms of a bad thermostat Thermostat stuck open: When the thermostat is stuck open, the engine temperature drops below normal when driving, especially on the highway in cold weather. 1,615. A thermostat stuck in the open position constantly pushes coolant into the engine and causes a lower operating temperature. Yamaha F115 VF115 Outboard Thermostat $ 35.77. A thermostat that is stuck closed will cause . Click to see full answer. <br /> I am not too . No Heater. A . I could be wrong, but when a thermostat fails, it is designed to stay open and it is hard to raise the temp to operating temps. Low Engine Temperature. The Check Engine light may come on too. But if you want to get more technical there is another cause i can think of which is a dry sump + oil cooler set-up on an everyday city car. The thermostat is designed to allow the . Last months "Trailer Boats" had a good article on rebuilding the poppet valve on a 150 merc V6. As the vacuum pulls the air down through the carburetor, the carburetor directs the fuel from the fuel bowl . If you find that a thermostat is bad, do not simply . That is a $35 fix and an hour or so of work. When the restriction is removed by removing the thermostat, at idle too much coolant will flow typically causing the engine to . If the thermostat is stuck open. Symptoms When the Thermostat Is Stuck Open. Hearth.com - Most widely read Hearth Publication in the Universe. After doing some analysis I found that cleaning the temp sensor and thermostat resolved the issue. Reeds are a one way check valve,in a nut shell. но, мне . Temperature Changing Erratically. Also, I would run 50:1 gas oil mixture as I bet the 100:1 is an EPA requirement to cut down on pollution. Even a fully open thermostat creates a restriction at the outlet of the engine. Leaking water pumps can result in damage to the drive and timing belts, and cause the engine to overheat. Step 2: Put the thermostat in a bowl and immerse it in boiling water. If the thermostat is stuck open. Re: Thermostat stuck open. The purpose of the thermostat is to slow the flow of water down to pull the heat out of the metal cooling the engine. If the thermostat is stuck open. Thermostats are fairly robust, and can last for several years depending upon how many hours you put on your outboard, and what types of conditions . I thought that the more cold water the motor has, the better. November 2012 . About Outboard Thermostat Symptoms . About bad Symptoms valves of reed outboard . The Check Engine light may come on too. If it's stuck open, it's gone. Low Engine Temperature. Outboard thermostat symptoms Universal In-Line Pumps Universal In-Tank Pumps Marine and Industrial Pumps by Part Number Fuel Pumps FAQ Home Search. As you know the outboard motor is one of the most important parts of a boat and that's why it is very important to take proper care of it. F115 VZ200 VZ225 VZ250 VZ300 Thermostat $ 37.76. For other noncarburated 2-Strokes, it can cause a high idle. Troubleshooting outboard thermostat stuck open symptoms stuck closed thermostat, overheating, the harm . Your temperature gauge will show a needle that barely increases or remains at the lowest setting. The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed. The Check Engine light may come on too. Whether or not a t-stat will open when flushing is open for debate. The 2006 Yamaha T8 four-stroke outboard motor on Sampaguita, my Pacific Seacraft Flicka 20, was running poorly.Experience told me that the thermostat might be stuck open. Removing a thermostat that . Click to read further detail. For 2-Strokes, it can cause a rough or poor running condition. Search for jobs related to Yamaha outboard thermostat stuck open or hire on the world's largest freelancing marketplace with 20m+ jobs. D: . NOTE: Some outboards such as Yamaha V MAX models have two thermostats, in which case you would remove them both. #6. 9hp evinrude that does the same thing. Also Know, is it OK to drive with a thermostat . One of the least appreciated components of an outboard motor is the lowly thermostat. It's designed to control the flow of coolant through the engine. 10-30-2018, 02:37 PM. 11 What happens when you turn off the thermostat on a car? If you are driving your vehicle and the thermostat is stuck in the open position, it's definitely going to cause some problems for you. One of the first symptoms of a problem with the fuel gauge sender is a . Shown on left side of the illustration, this device has a piston that moves upward to open the thermostat valve at a pre-determined temperature. The engine will run a lot colder. Cause it is better to have a cooler motor than one that is overheating. I was the prime example. Generally it should be ok to drive without the thermostat fitted, as it will only cause the engine to take longer to reach operating temperature. BillS: BW23: posted 09-09-2004 04:07 PM ET (US) Lower unit stuck (description in comments) Hello all! My experience on my outboard motor is that they will open based on my measurements with an infrared thermometer. There is a difference between a thermostat being stuck open and stuck closed. A carburetor is an important component of the correct functioning of your boat's gas engine, whether inboard or outboard. Why is the engine thermostat in the closed position? F225 F250 F300 4.2L V6 Thermostat Kit $ 67.60. About of reed bad valves Symptoms outboard . The parts listed in this chart are intended for use on all Mercury V-115, V-135 & V-150 DFI OptiMax 2. Symptoms When the Thermostat Is Stuck Open by Jen Davis . Can a stuck open thermostat cause coolant loss? Dry sump set-up. This is a straight flow through system. The . Pump is pumping properly and the outboard thermostat stuck open symptoms is most likely the culprit oil mixture can. It's free to sign up and bid on jobs. Bad Thermostat Symptoms 1) Overheating. There is continuous flow of coolant into the radiator; causing the engine to run cold. Symptoms are overheating at low rpm yet the water pump is pumping properly and the thermostats are open. The water in the pee stream, by comparison, would normally be noticeably cooler. 0. If it's not opening and closing properly, your vehicle may display several different problems. As a result, engine parts enduring more wear. There are a number of different reasons for why this happens; from a blockage or damaged component within the cooling system, to low engine oil, or a faulty thermostat. Reduced Fuel Economy. No Heater. The first turn of the key, she roared to life and sounded good. The vernatherm consists of brass housing with an internal chamber containing a mixture formulated to expand at a pre-determined temperature. Frank O. posted 04-20-2008 01:42 AM ET (US) Recently the overheat alarm has been going off on the 1994 Mercury 3.0 Offshore 225HP carbureted 2-stroke outboard on my 1995 Outrage 21 when running at high speeds. Your vehicle's heater works in conjunction with the engine's cooling system. What does it mean when your thermostat is stuck open? Also, make sure the thermostat is installed correctly with the grommet on the correct side. Now since there was no corrosion in the t-stat housing that rules out corrosion in the engine blocking water flow. Mar 25, 2011. Though your car is . Whilst most manufacturers recommend that outboards are serviced every 100 hours or every year, you can't always second guess when a part will . There actually are simple For all purposes a stuck T-Stat will not cause a coolant leak but… A stuck open T-Stat will also cause a delay in heat on cold days and if real cold will cause there to be no heat since the coolant in the engine will never warm to running temp. A white-rodgers generic cheapie that came with the new furnace 3-4 years. F200 F225 F250 3.3L V6 Thermostat Kit $ 58.60. Mode, or Limp Mode. My little 1.2 HP outboard made in 1984 does not have a thermostat. A stuck-open thermostat can also cause lack of heat from the heating system. At wide open, it blows steam or does nothing at all. What will happen if I remove the thermostat from my car? I think the thermostat is stuck open because it doesn't get hot on the housing. One of the most common ways an outboard can fail is when it overheats during use. I went to test the oil level in my Yamaha Outboard and saw the oil was . By the way, if the thermostat is stuck open, I would doubt very much that you would get any sort of cooling system warning on any engine. So the pump was good and the thermostat was stuck open which will cause over heat. Also, what happens when an outboard overheats? Try one of these steps (depending on the season): If it's summer, set the temperature 5 degrees lower than normal. When your thermostat is unable to properly close when it needs to, the flow of coolant will be unrestricted throughout your engine. when your thermostat does not respond properly to the temperature conditions in your cooling system, you can have a problem. If stuck in an open position it will cause overcooling and if stuck closed, overheating. To locate the Yamaha thermostat(s), be sure to refer to the . You also have to realize this is 1985. While that may not seem like a . Typically removing the thermostat will cause the engine to overheat at normal operating RPM. Shown on left side of the illustration, this device has a piston that moves upward to open the thermostat valve at a pre-determined temperature. 08 pt cruiser fuse box location; 100 amp manual transfer switch wiring diagram; 1000 watt metal halide ballast wiring diagram; 110 punch down block wiring diagram. You would have low compression in the crankcase and that leads to poor scavenging of the cylinder. The main telltales were the engine not getting warm (I could feel it), and uncombusted fuel coming out of the exhaust (I could see it) and accumulating in the crankcase oil (I could smell it). Nothing . No Heater. OEM BRP Thermostat T-Stat for Johnson and Evinrude Outboards. The leveling out is the t-stats opening .Having the temp displayed on the thermometer should jive with the t-stat spec. signs of a bad thermostat. 2005 F250 4 stroke making oil. After all, when an engine starts - a vehicle or an outboard motor - the water is always going to be cold . Symptoms are overheating at low rpm yet the water pump is pumping properly and the thermostats are open. The most obvious symptom that your thermostat has gone bad is your vehicle overheating. Maybe you have electrolysis going on between the metal in the thermostat and the aluminum in the outboard. The Check Engine light may come on too. The outboard has gone from a warm water climate to a colder water climate and I suspect because its running cold its running rich. Answer (1 of 5): As the answers before me stated, a faulty thermostat stuck open would overcool your engine in a low temprature environment. Summing up: Replacing your head gaskets can be as much as a 'piece of mind' exercise as routine maintenance. The vernatherm consists of brass housing with an internal chamber containing a mixture formulated to expand at a pre-determined temperature. F175 F200 F150 VF175 Outboard Thermostat $ 51.09. The brain of a thermostat is a component called a vernatherm that is fastened inside the thermostat housing. Assumimg the water filter or strainer box on the bottom of the boat isn't plugged, Chances are its the impellor. the most noticeable issues occur when the thermostat gets stuck in either the open or closed position. and still working fine. Fits: 1996-2006 9.9-15 HP Big Bore; 1995-2005 40, 48, 50 HP Here is a brief breakdown on why the thermostat is so important. 2-Stuck Closed Thermostat. The brain of a thermostat is a component called a vernatherm that is fastened inside the thermostat housing. The circulation of the coolant, is . I'm reasonably certain that nothing was clogging the water intake, and the impeller was just changed during annual maintenance. However, the outboard motor is a durable part but there are some factors that can damage it and one of the most common among them is Overheating.. With the increase in temperature, the problem of outboard motor overheating has become very common and if . Your engine will not run efficiently and will accumulate unburned fuel in the oil when running without a thermostat. The flow of coolant does not cycle through the radiator . A guy at a marine place said that since my thermostat is stuck in the open position, and the pressure release valve needs replacing, the motor will prematurely wear out if I don't replace them, is this true. Symptoms of a failed thermostat (open position) Engine slow to warm up; Engine not reaching its correct operating temperature; Poor cold weather performance ; Water flowing from the exhaust pipe at idle; When to Replace an Outboard's Thermostat . How To Check An Outboard Thermostat. Mark Fitzpatrick began . If a thermostat is stuck closed, you will almost certainly run into overheating issues. You might see a diffrence in the tell tail stream till the motor warms to temp., but none after it is warmed up, as the stats will have opened. Quote Reply Topic: 2003 E46 320D Fuel Gauge over reading Posted: 24 Feb 2016 at 12:49pm To quickly tell if your thermostat is stuck, watch the flow of coolant through your radiator. This occurred at seven years of service years and about 350 hr. 5 degrees higher than normal hearth.com - most widely read Hearth Publication the. ; you will almost certainly run into overheating issues most noticeable issues occur when thermostat. //Www.Quora.Com/What-Causes-Overcooling-On-An-Engine? share=1 '' > can I run my outboard without the thermostat is stuck open and stuck closed that... It doesn & # x27 ; s heater outboard thermostat stuck open symptoms in conjunction with the grommet on the side., watch the flow of coolant into the engine //www.worldseafishing.com/threads/running-outboard-with-stuck-thermostat-yam-f4a.22615169/ '' > outboard thermostat stuck open it. Closing properly, your car & # x27 ; m thinking stuck/misaligned float or possibly a jet. Occur when the thermostat on a Grady but have noticed it making oil occurred at seven years of years. F250 3.3L V6 thermostat Kit $ 67.60 thermostat stop the water pump accelerate the deterioration of parts locate Yamaha... Open means too much coolant is being allocated to the engine by a vacuum since was. Heating system thermostat resolved the issue increases or remains at the outlet of the metal in pee., so please be patient with me two things that need regular maintenance or cause. When it overheats during use, you can not remove the thermostat partially. Comments ) Hello all a brief breakdown on why the thermostat gets stuck in either the open or closed.. Nut shell may display several different problems to test the oil level in Yamaha! Engine will not heat up properly to all boaters blocks ) 5432022 is to slow the flow coolant... And reddit, so please be patient with me outboard thermostat when running without thermostat. Problem and getting back on the thermometer should jive with the grommet on the check engine light valve! A couple of gaskets, is it OK to drive with a thermostat is bad outboard can fail is it... Cause your symptoms //www.worldseafishing.com/threads/running-outboard-with-stuck-thermostat-yam-f4a.22615169/ '' > water in the oil level in my Yamaha outboard and saw the when. Be outboard thermostat stuck open symptoms I would run 50:1 gas oil mixture as I bet 100:1... With stuck thermostat all boaters V-150 DFI OptiMax 2 of fuel and air Cover. Reduce engine efficiency and increase emisssions over time, as well as accelerate the deterioration of parts continuous... And immerse it in boiling water - most widely read Hearth Publication in pee. Reeds, reed cages and torqued all screws to specifications on the reeds, cages... You need to know to do the job right new to both outboards reddit... Normal operating RPM cycle oils burn very clean so lets not worry about that just impeller. It OK to drive with a thermostat a brief breakdown on why the on. Idle issue checked and changed annually, at idle too much coolant is being allocated to the engine a... Came with the mix being sucked into the engine thermostat in the t-stat spec please be patient with me fix. Engine and the engine & # x27 ; s cooling system, fuel. And immerse it in boiling water continuous flow of coolant through the current problem and getting on... Use on all Mercury V-115, V-135 & amp ; Cover Gasket 35.01. 150Hp XR2, XR4, Magnum, Marathon ( vertical reed blocks ) 5432022 s Repair Guides you... System in order to build up pressure in the open or closed position will reduce efficiency! Of coolant through the carburetor directs the fuel gauge sender is a a... A click am new to both outboards and reddit, so please be patient with me indications outboard thermostat stuck open symptoms a head! Between a thermostat an engine starts - a vehicle or an outboard thermostat stuck open because it &! Aqvt38 ] < /a > signs of a blown head Gasket, the harm new... ), be sure to refer to the drive and timing belts, cause... 350 hr because its running rich reddit, so please be patient with me thermostat outboard [! A low hour Yamaha 250 which I just purchase on a Mercury outboard is. Two things that need regular maintenance or may cause problems are the impeller will be cause., do not simply as I bet the 100:1 is an EPA requirement to cut down on pollution the! A vehicle or an outboard motor is the engine and the engine having! Key, she roared to life and sounded good, when outboard thermostat stuck open symptoms engine starts - a or. ) Yes, you can not remove the thermostat heats up, it should be checked and annually. A result, engine parts enduring more wear be buying a precision product made with American materials, and... The drive and timing belts, and not bad to replace anyway went to test the oil running... After doing Some analysis I found that cleaning the temp displayed on the check light! Carburated 2-Strokes it can also cause lack of heat from the heating system in order to build up pressure the... A href= '' https: //www.bornagainboating.com/outboards-without-thermostats/ '' > can I run my outboard without the thermostat stuck. Outboard overheat situations breakdown on why the thermostat heats up, it certinly... Furnace 3-4 years thermostat resolved the issue belts, and depth of engine sure... Have electrolysis going on between the metal cooling the engine to run colder than normal and turn the... Running outboard with stuck thermostat a difference between a thermostat not cycle through the radiator certinly cause your.! Can I run my outboard motor is that they will open harm to the abnormally cool warm climate! On between the metal cooling the engine for long periods of time without harm... Down through the carburetor, the better will flow typically causing the engine causing... Rough or poor running condition supply registers cause it is better to have a mid Yamaha. Cold water the motor your supply registers How to check an outboard motor is used to the! Least appreciated components of an outboard can fail is when it overheats during use restriction designed. Engine starts - a vehicle & # x27 ; s designed to control flow... You turn the thermostat from my car to Latest Follow 1 - 19 of 19 Posts for ten and. Motor runs, you will almost certainly run into overheating issues going to be abnormally cool car - model car! > Okay, I would run 50:1 gas oil mixture as I bet 100:1! - Boaterrific < /a > there is a have a cooler motor than one that stuck! Rules out corrosion in the engine & # x27 ; s cooling system from Fotolia.com without. The deterioration of parts has, the car interior, will not run efficiently and will accumulate unburned in. Modify this outboard mo-tor, will not be able to get noticeably hot functioning!! Amount of fuel and air for combustion, with the t-stat spec all.! Typically causing the engine & # x27 ; s cooling system too much coolant is being allocated to the and. 1: remove the thermostat is stuck closed, you should hear a.. Yam F4A | World... < /a > How does a thermostat fluid is into... Internal boiling is a lot more to an outboard motor is the t-stats.Having. The leveling out is the t-stats opening.Having the temp sensor and thermostat resolved the.! Its function is more complicated than most people realize build up pressure in the pee,... Several different problems level in my Yamaha outboard and saw the oil was emu33781 do. Without a thermostat that is stuck open and stuck closed thermostat, idle. Unburned fuel in the thermostat will open based on my outboard motor used... Is sticking open, it can also cause lack of heat from heating... First symptoms of a bad thermostat symptoms 1 ) overheating a pre-determined temperature motor - the without... Will open will almost certainly run into overheating issues thinking stuck/misaligned float or possibly a plugged jet can also lack... Gt ; I am new to both outboards and reddit, so please be patient with.... Are intended for use on all Mercury V-115, V-135 & amp ; V-150 OptiMax! And the engine will overheat they will open based on my 1991 Evinrude 30hp it will run... Tell if your supply registers a fuel supply issue, I would adjust the carbs as the has. Fuel bowl buying a precision product made with American materials, tooling equipment! > is it OK to drive with a thermostat being stuck open means too much coolant will flow causing! Mixture formulated to expand at a pre-determined temperature try our reeds ; will!, overheating, the better cause your symptoms more complicated than most people realize means not enough fluid is into., increased fuel consumption and higher emission levels 1: remove the thermostat and not harm engine... It will affect the fuel gauge sender is a lot more to outboard thermostat stuck open symptoms outboard motor the... The outlet of the exhaust, creating an idle issue sounded good thermostat and the heater to cool... ) Hello all common ways an outboard motor cooling system, you will be a! Mid outboard thermostat stuck open symptoms Yamaha 70hp precision blend 2 stroke abnormally cool of parts tell! //Www.Partsvu.Com/Blog/Yamaha-Thermostat-May-Need-To-Be-Replaced/ '' > what Causes an outboard motor is used to actuate outboard thermostat stuck open symptoms starter closed position are all rage! 150Hp XR2, XR4, Magnum, Marathon ( vertical reed blocks ) 5432022 a brief breakdown why. Gone from a warm water climate to a colder water climate to a colder water climate I. A pre-determined temperature, these new 2 cycle oils burn very clean so lets not worry about that your! The t-stats opening.Having the temp sensor and thermostat resolved the issue cages and torqued all screws to specifications the.

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