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How hot should evinrude 4hp run?

L

lakewind

Member
I was running my 1978 evinrude 4 hp model 4806e in a 55 gal. barrel today for about 15 minutes.Seemed to be running a little hot after about 15 minutes.I was dripping water on cylinder head and it would boil off.I have replaced the water pump impeller,cleaned water passages.Actually pulled the head and blew some compressed thru the tiny water passages around the cylinders to make sure they were clear.Warm water was dripping out the exhaust holes while running like it should.These engines have no water pump tell tale.Do these engines have cooling issues due to tiny cylinder coolant passages? Should the cylinder head get that hot that water would boil when dripped on it? I'm afraid to over heat this motor since I have put money into it.I would be thankful for any help or suggestions.
 
The motor is 40 years so I do not think there are issues with the design.------If water boils off , the engine is too hot !!---Time to investigate.-------You are running in a barrel with water 6" or more above the pump I hope.
 
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After your reply I went and added more water to barrel until exhaust holes were covered.Ran engine 17 minutes and it would not boil water when I dripped some on cylinder head.I was running the water level lower so I could see water coming out exhaust holes not realizing I was the one over heating engine.Thank you racer one.
 
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