Home › Forum › Ask A Member › running without a t-stat › Re: running without a t-stat
Cya answer is never run without a thermostat.
Others will say outboards don’t need thermo’s.
Many outboards were designed without a thermostat.
If given the choice only between overheating or running too cold for a short of time I pick too cold.
Some models need the restriction of the thermo to flow the water properly through the motor. Some do not.
Its probably motor dependent on whether to run with or without for a short period of time.
I designed and made an external manually adjustable flow restrictor for my 9.9/15 instead of a thermostat. I can set it anywhere I want from the outside. I wasn’t sure if the cooling demand would follow the flow curve but it works terrific.