Originally Posted by mohamedshaheen
.......I had the engine out with I ran it, it was over heating WHEN IT INGEAR. I replaced the fresh water pump and cleaned the tube for the heater exchanger and replaced the thermostat and ran it. and it did not over heat running on the ground with no prop
but back in the water on my trip to NY I could not push the throated because it over heats
One other thing to check. There is a steel
plate between the fresh water pump and the engine, with a gasket
on each side of the plate. These gaskets are not identical.
In the Caribbean
I once had a 'shade tree' mechanic
who put two identical gaskets in place, with one gasket
blocking a water port; this improper gasket caused overheating.
Note that when everything is correct, the engine should not overheat even when running flat out. After I flew a master mechanic
friend to Tortola to fix my engine (he found 5 things right away, and fixed them within an hour), he told me to head
from Nanny Cay to Cooper
Island with the engine FLAT OUT (maximum RPM). We did so and there was no overheating.
The engine should run at 180-190 degrees.