Can you run a Yamaha outboard without thermostat?
Yes, you can temporarily run your outboard without the thermostat and not harm the engine. No, you can not remove the thermostat and continue running the engine for long periods of time without causing harm to the engine.
Do Yamaha outboards have thermostats?
Yamaha outboard motors are equipped with a thermostat that limits the quantity of cooling water allowed into the motor until the motor reaches its normal operating temperature.
How do you know if thermostat is bad outboard?
Symptoms of a Bad Thermostat
- Engine overheating, particularly at idle and low running speed.
- Engine going into limited power or slow mode to mitigate against overheating.
- Increased fuel consumption.
Do 2 stroke outboards have a thermostat?
yes, they do have thermostat.
Can you put a car thermostat in a boat?
If it uses antifreeze (closed cooling system), use an automotive thermostat which is the correct opening temperature. If you have a raw water cooled engine, go with the marine thermostat. The materials may be different (stainless vs plated steel spring, etc) to withstand corrosive effects of salt or fresh water.
What temperature should my outboard run at?
140 or so (at the stat). The thing you need to remember is most boat water temp gauges are not precision instruments. 2 Strokes run a little hotter. That’s hot, but might not be accurate.
Why is my Yamaha outboard overheating?
Any water restriction in your Yamaha Outboard can cause overheating. Another reason why your Yamaha Outboard will overheat is the thermostat is not opening properly. Thermostats are designed to open and close at certain tempertatures. If a thermostat has seized, the thermostat will remain at that poistion.
How do I know if my outboard thermostat is working?
Step 2: Put the thermostat in a bowl and immerse it in boiling water. As the thermostat heats up, it should open. When you remove it from the boiling water, allow it to cool and it should close again. If the thermostat remains open or closed, it has failed and must be replaced.
What happens when you run a boat without a thermostat?
Once the engine heats up more than normal it will stay hot even at idle. This only happens after the engine heats up.
Is there a difference between a marine thermostat and a Automotive thermostat?
How do you know if your outboard is overheating?
How To Tell If Your Boat Is Overheating
- The first and easiest is if the dash gauge for the temperature goes out of the green and into red.
- If it feels like the engine is losing power, you might be overheating.
- An overheated engine may not want to start up again after you shut it off, until it cools down.
Should water coming out of outboard be hot?
Your water flow should appear steady in most outboards. You also want the water coming out to be warm, but not excessively hot.
How do you test an outboard thermostat?
What does the poppet valve do on a Yamaha outboard?
The purpose of the poppet valve is to regulate coolant water pressure. Or more specifically, the amount of cooling water that is running through the engine block. This helps to regulate the temperature at different operating speeds of the engine.
What happens if an outboard overheats?
The cooling system keeps the oil temperature down so the oil can lubricate the internal parts of the engine. Overheating ruins the lubrication and the metals parts start melting and sticking together. Or they just break apart with a big bang.
How do you test a thermostat on a Yamaha outboard?
Can you use an automotive thermostat in a boat?
Why does Yamaha outboard overheat?