This engine came on a boat I bought a few months ago. It originally had no temp gauge. While out, we got clogged water intakes & the thing overheated and shut down. Never an alarm, or any other warning.
Since that time, I have (of course) cleaned the intake & also replaced the water pump. About the same time, I installed a temperature sender and a temperature gauge. Last outing, I noted the engine got to nearly 200 degrees F. The engine ran ok, but the temperature concerned me. Later, in an effort to track down why the engine was getting so hot, I pulled the thermostat covers to discover... there were no thermostats installed!
I read conflicting opinions about running without thermostats, including several that said the engine, especially the top cylinders will overheat without the thermostats restricting flow & allowing the water jacket to FULLY fill with cooling water.
I ordered new thermostats and gaskets. Installed them today & gave a test run. I quickly went OVER 200 degrees F, so I shut down.
I know water is flowing. The engine "pees" out the report hole. It was a weak-ish stream before, but very vigorous after installing thermostats.
What's the deal?
Since that time, I have (of course) cleaned the intake & also replaced the water pump. About the same time, I installed a temperature sender and a temperature gauge. Last outing, I noted the engine got to nearly 200 degrees F. The engine ran ok, but the temperature concerned me. Later, in an effort to track down why the engine was getting so hot, I pulled the thermostat covers to discover... there were no thermostats installed!
I read conflicting opinions about running without thermostats, including several that said the engine, especially the top cylinders will overheat without the thermostats restricting flow & allowing the water jacket to FULLY fill with cooling water.
I ordered new thermostats and gaskets. Installed them today & gave a test run. I quickly went OVER 200 degrees F, so I shut down.
I know water is flowing. The engine "pees" out the report hole. It was a weak-ish stream before, but very vigorous after installing thermostats.
What's the deal?