Thermostat

[Water Strider]

Some have them, some don't.

I know how they work. I know what they do for a car. But what purpose do they serve in an outboard?

I can make some guesses, but they seem to be just another source of problems. So why not just remove it?

Thanks

 

[DJ]

Re: Thermostat

They regulate the temperature in the engine block. They keep the temperature of the block even. Without them, you get hot and cold spots. NOT GOOD.

Believe me, if the engineers didn't think they were necessary, they would have left them out.

I don't second guess the people that designed it.

 

[Silvertip]

Re: Thermostat

Just as an engine can seize due to overheating, it can also seize due to being too cold, especially when you hammer down after initial start up. Pistons heat up under load much quicker then the engine block. The difference in expansion rates can cause piston expansion so fast that it literally sticks in the cylinder (called cold seizing). A thermostat in an outboard therefore serves the same exact purpose as it does in a car. I allows rapid warm up and better performance an economy because engine temperature is more uniformly controlled.

 

[5150abf]

Re: Thermostat

I did notice a marked improvement in fuel "economy" after I changed my tstat and the motor ran alot better in general and as stated people way smarter than me decided it needed one so I am not going to argue.

 

[Benny1963]

Re: Thermostat

they keep your motor at correct temp ,
that helps with carbon build up helps burn all the gas
and adds to engine life and performance a must in any motor
thats why the factory uses them