How to test a thermostat for your outboard or car

[@derickdouangnouanexay]

I did that with my old ones both open up when put in hot water an close but when I put them back in to the motor it want pee but when I take it back out the motor pees

[@joeseif]

I would just replace them with new and test again. Also it the motor warmed up when you test?.

[@derickdouangnouanexay]

@@joeseif no as soon as a turn on if I don’t see any water coming out I turn it right off