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1983 Johnson 15 hp just dies after about 1 hour of trolling
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<blockquote data-quote="muddywaders" data-source="post: 454635" data-attributes="member: 13234"><p>Intermittent problems can be hard to diagnose.Start simple.Case in point;I was having a cylinder drop out at a specific r.p.m. I did the full c.d.i. procedure.Everything checked out hot or cold.A friend who does not work on motors suggested I change the plugs.I scoffed since I had good spark and the plugs only had a few hours.Plug failing at high r.p.m. Felt pretty stupid.Not sure your testing the coils properly.You must swap the primary(wires that go to the coil)as well as plug leads.Bottom coil will now fire top cylinder.If top plug has no spark you can safely assume bottom coil is bad.As mentioned earlier some components fail only when hot.Good luck m.w.</p></blockquote><p></p>
[QUOTE="muddywaders, post: 454635, member: 13234"] Intermittent problems can be hard to diagnose.Start simple.Case in point;I was having a cylinder drop out at a specific r.p.m. I did the full c.d.i. procedure.Everything checked out hot or cold.A friend who does not work on motors suggested I change the plugs.I scoffed since I had good spark and the plugs only had a few hours.Plug failing at high r.p.m. Felt pretty stupid.Not sure your testing the coils properly.You must swap the primary(wires that go to the coil)as well as plug leads.Bottom coil will now fire top cylinder.If top plug has no spark you can safely assume bottom coil is bad.As mentioned earlier some components fail only when hot.Good luck m.w. [/QUOTE]
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1983 Johnson 15 hp just dies after about 1 hour of trolling
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