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    Yamaha 9.9 HP 4-Stroke water in oil

    Head gasket, cracked head or cracked block. Better to do a leak down test and listen for where the air is escaping (into the block, exhaust or intake). Then if you change the head gasket, you can repeat the leak down test and see if you fixed the leak.
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    Yamaha F150 low compresion

    Hello, I was changing the spark plugs on my 2004 Yamaha F150 and thought it would be a good time to do a compression check. A few years ago it was 185 on all cylinders, today it was different. Today, cylinders 1,2 and 4 were 180-185, but cylinder 3 was 140. Not good, I went ahead and did a...
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