"I have a Volvo Penta 4.3 in
"I have a Volvo Penta 4.3 in an 18 foot Glastron, its a 2000. The temp gauge shows 100 to 110 even after fully warm. Mechanic said I should replace the thermostat cause its stuck open. I have been told it is really easy, even for someone who doesn't work on...