[THEFERMANATOR]

Originally Posted by the daydreamer

jdog you can ck the thermostats real easy. they are up abouve the spark plug. it is a 13/16 scocket just like the spark plug.take the blace plastic plug out,then the spring then the thermostat. make sure there is no blockage,silt or sand were the thermostat is also ck thermostat to make no slit or sand has it blocked.

This applies to the OLD cross flow V-6's, not the new style loopers. And just because it is pumping doesn't mean it is cooling. You could have a stuck T-stat, a bad poppit, or sand or silt blockages inside the engine. Also the water pumps in the 93+ style 200/225's MUST be in TOP shape for the cooling system to work properly. They work off of pressure, and if tehy don't get enough pressure they WILL overheat(they need about 13PSI or more to open the poppits and cool at speed). And if it seems to happen as your hitting teh throttle, theres a good chance it is fuel restriction causing it to go off. Most importantly, DO NOT RUN IT WITH A HORN GOING OFF! If it is fuel restriction you can lean it out and melt a piston in a HURRY. If it is an overheat you can lock it up QUICK, and if it has oil injection it could not be oiling. Unless you know the horn is a false alarm, DON'T RUN IT WITH IT GOING OFF(unless you like wasting $2500 for another powerhead). These big V-6's are NOT forgiving to overheat or lean out.