what thermostat

[Big D]

I have a 1989 3.0 Mercruiser with an Alpha I outdrive. The temp. guage never moves and the engine is only warm to the touch. What degree thermostat do I need? Will an automotive type work? I only run in a lake with a neutral PH. The engine runs fine, do I really need a thermostat?

 

[ODDD1]

Re: what thermostat

you need a 140 degree MARINE thermostat....whats the automotive stuff? go to a marine dealer an buy one...i'll bet they will have the gasket you need too.