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...
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...
