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    82 Mercury 50

    Originally had a problem with top cylinder having low compression with only 40 lbs. The others were all in around 125. Took it out not realizing the impeller was shot and engine overheated and left me stranded. Took it home and tested the pistons again and this time had 100 in the top and 90...
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    Low Compression in top cylinder

    My 82 Mercury 50 only has 40 lbs compression in the top cylinder and 125 in the other three. The motor has only enough power to troll slowly along and when I try to give it more gas it stalls out and kills the battery. Is the lack of compression in the top cylinder giving me all the problems...
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