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Big Fish Hunter247

1987 Johnson 40Hp

3 posts in this topic

My dad has 1987 40hp Johnson that he just bought. Im a mercury guy so this seems kinda odd to me but there is alot of steam that comes out of the exaust above water is that normal? is it something to worry about I just replace the water pump in it this last weekend.

Big Fish Hunter247

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Have you felt the top of the cylinder head? is it hot? I'd want to make sure it's not overheating by checking the actual temp. I use a laser type thermometer. A little steam wouldnt seem to odd considering the water temps are still pretty low yet but if you are seeing alot it's worth verifying the temp.

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I will check that this weekend and get back on it. if it is overheating could it be like a pluged passage way throught the water jacket? the previous owner ;eft it on a lake with alot of lime (I can tell there alot on the boat itself)

Big Fish Hunter247

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