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  1. J

    Mercury classic 50 HP - part 2

    https://forums.iboats.com/threads/low-compression-1986-mercury-classic-50.775479/#post-5951933 This is the original post and I’m making a sequel to that. In that post I basically discover that my top cylinder is giving me a compression of 30 to 40. When hot 100 I suspected there was something...
  2. J

    Low compression - 1986 Mercury classic 50

    I’m having low compression on cylinder #1 at 95 PSI when warm and 50 when cold. Cylinder #2 is at 125 Cylinder #3 is at 125 and Cylinder #4 is 115 Here’s a video of the engine running. I have an understanding that an engine with low compression tends to misfire and not start and if it does...
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