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Recent content by Qvist

  1. Q

    Help to id year of 50hp merc

    So, my old 1978 blue band 500 thunderbolt(long) clogged up a cooling channel and seized up. To remedy this I bought a supposedly 1985 50hp short shaft. A successful powerhead swap later and I got a working motor again! However! I would like to determine the year of the motor just in case I...
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