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    1982 25hp top cylinder won't fire

    Yes, you called it FIRST! Thanks! (New to this forum and replying.)
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    1982 25hp top cylinder won't fire

    Found several very tiny holes in pump diaphram. Poor quality rubber, I suspect. Thank you tphoyt and saltchuckmatt!
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    1982 25hp top cylinder won't fire

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    1982 25hp top cylinder won't fire

    I read that, but ...one carb, two cylinders, one cylinder runs fine.
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    1982 25hp top cylinder won't fire

    (I've been working with various outboards, inboards and IOs since the 1970's. This one's a stumper. 😜)
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    1982 25hp top cylinder won't fire

    Has new fuel pump (boat runs in water with fair power on only one cylinder, but lots of gas/oil residue out exhaust, naturally) . My original post said vapor comes out with plug out (cranking). Using spec QL77JC4 plugs. Possibly timing of spark is off from the new control module?
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    1982 25hp top cylinder won't fire

    Spark jumps 3/8" ok for both plug cables. Under flywheel is good. Head ground is good. Swapped coils, plug cables, top just won't ignite on compression (105 psi). New ignition control module bad out of box?
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    1982 25hp top cylinder won't fire

    Stumped with 1982 Johnson 25hp: Both cylinders 105 psi, both getting spark (open plugs & timing light), vapor coming out both plug holes when out (but heavier out of top cylinder). Will run with both plugs or only lower plug wired but not with only top plug wired. New ignition module and...
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