engine runs hotte than normal

[mexgyver]

own a sea ray with v8 305gm mercruiser, it's been running hotter than usual, just replaced water pump(lower drive and circulating engine pumps) what would happen if i take the thermostat off, just like in older cars i do most of my boating in temperatures above 90 degrees, water temp probably 70-75 dgrees, is it a most to have a thermostat i a standard cooling system(not closed system)thanks,Ed

 

[Bt Doctur]

Re: engine runs hotte than normal

could be the therm. or could be clogged manifolds and risers.

 

[Don S]

Re: engine runs hotte than normal

Yes, you need a thermostat in it. Get the Mercruiser 143° stat. Without it, the water goes through the block too fast and you end up with hot spots.

 

[jlinder]

Re: engine runs hotte than normal

Since it was running fine before (I assume)here is the question I always ask:<br /><br /> What changed?<br /><br />You have a symptom (hot), removing the thermostat will just mask the problem at best, setting yourself up for a big problem later on. (I am told that rusted manifolds can leak water back to the cylinders and give you hydrolock)<br /><br />For this and any problem, find out what changed, then decide what to do. Way cheaper in the end.