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    Yamaha 15FMH 2-stroke – Bottom Cylinder Spark Plug Looks Lean?

    Hey everyone, This is my first forum post, so apologies if I’m missing something! I’m working on a 2000 Yamaha 15FMH 2-stroke outboard, and I’m having trouble getting it to run properly. It doesn’t idle at all, even with the idle screw turned fully out and the air screw 1.5 turns out. It...
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