"Can any one tell me what ther
"Can any one tell me what thermostat I should be using for a 1987 350 (260hp) mercruiser i/o. I use it mainly for trolling at low rpms (700 - 850). Didn't know if I should use the 140 or a higher temp. Thanks, Rick"
"I have a 1987 5.7 Mercruiser
"I have a 1987 5.7 Mercruiser with 3300 hours. each year for the last 3 years it has started the season with an overheating problem at low rpms. I change the impeller and it runs fine.previous to this I usually changed the impeller every 3 years as a precaution...