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  1. J

    1977 Mariner 15hp will not fire on top cylinder

    Ok, I have a 1977 mariner 15hp I'm working on. The top coil was not firing when he brought it to me. I swapped wires on the coils and the top one was firing so both coils are good, both condensers/capacitors are good, and the magneto is good. I replaced the wiring harness and got both coils to...
  2. J

    96 johnson 15hp will not run at high rpm

    I have a 96good johnson 15hp. It idles good, runs good at low speed, but surges when I try to run full throttle. I cleaned the carburetor and replaced spark plugs. Didn't help. I need some advice on what to look at. Thanks.
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