Re: Piston Ring Sources

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February 6, 2018 at 10:32 pm #70732
David Stanton
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    quote cranehawk:

    I have a 1960 Evinrude litewin 3hp that needs a power head rebuild (compression less than 30lbs). Is there a good source for piston rings? I have only been able to find NOS. It will cost $80 for four rings!

    Additionally, what else should I check while the power head is torn down?

    Thanks


    Look at the head gasket for a break between the two cylinders. It is fairly common and drops compression to about 30 pounds in both cylinders. It is caused by a slightly warped head, and the slight warpage of the aluminum head can be sanded down by placing wetordry sandpaper on a perfectly flat surface (I use the smooth steel top of my old tablesaw) and working the head across it until it’s straight. New head gasket is Sierra (or NAPA) #18-3841-2.
    Dave