Question about Boating
Actually, idling this mercruiser 228's engine is like idling a car. The traffic fan in a car will go on because heat builds up with the lower rpm's on the water pump. Also, less wind to cool a radiator.
I see that you noticed a difference between 1000 rpm and 1600 rpm where it cools down and at higher speeds you never have a problem.
If the water pump had a problem like a leak or poor circulation, then this would indicate that you have to replace it.
I don't think anything is defective, based on what you said.
In GM vehicles, for instance, temps rising to 230 or so are not uncommon. If you apply this to your question, I would say that you're on safe ground. Just avoid idling for long periods of time, just like a car.
Happy boating to you.
Posted on Jul 08, 2010
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Posted on Jan 02, 2017
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