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    1975 Johnson 115 & 135 Compression Difference Between Heads

    My 1975 Johnson 115 has a significant difference in compression between port and starboard side. Port is 100 and 115 Starboard is 137 and 137 1. I would like to bring up the compression on the port side and would rather not get into a rebuild. Could I gain compression by putting a 135 head on...
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    1975 Johnson 115hp Stator Test - interpet results

    Motor is a 1975 Johnson 115hp with no spark at all. Boat just died yesterday after 10 min of WOT, then after touching the heads to make sure it wasn't melting I started it again, then it died after about 10 min of WOT. This went on a total of 4 times on the way back to the boat launch. Then it...
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