russellackland
Cadet
- Joined
- Apr 21, 2002
- Messages
- 15
I have a 1976 888 Mercruiser on a 21' 4000lb Larson. 17" Pitch prop, 140 deg thermostat. 2bbl rochester, Fresh Water Cooling and cabin heater. At idle (800rpm) temp is at 140 or returns to 140 when slowed(800 rpm). At 3000 RPM (23 mph) temp creeps up to just under 180 deg. Good temp gauge, sender, new water pump, exhaust manifolds and mallory distributor last year (end of season). water passages in engine and cooling system clear. Engine runs and starts great. Is 180 deg normal or OK?