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Johnson 3 cyl 35 hp - Runs for while then dies
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<blockquote data-quote="rktman" data-source="post: 418978" data-attributes="member: 11818"><p>I know this is old but I still haven't tracked the problem down yet. Purely by coincidence, I watched a guy running his Evinrude 3 cyl 25 hp (same motor as my Johnson 3 cyl). </p><p>His did the exact same thing. It will run fine for a 5-10 minutes, then starts coughing, then just dies. Wait a few minutes, runs fine (only for a brief period), shuts down..repeat.</p><p>Pumping with a hard bulb doesn't change anything, fuel is in carbs and filter. Like me, the other guy replaced plugs, CDI box at $400, switch primer bulbs/tanks, cleaned carbs, checked compression, stator checked, unplugged temp sensor, etc. </p><p></p><p>It seems to be a hot fail condition somewhere but its hard to diagnose.</p><p></p><p>Any recommendations? Its just too good of a motor to give up on.</p></blockquote><p></p>
[QUOTE="rktman, post: 418978, member: 11818"] I know this is old but I still haven't tracked the problem down yet. Purely by coincidence, I watched a guy running his Evinrude 3 cyl 25 hp (same motor as my Johnson 3 cyl). His did the exact same thing. It will run fine for a 5-10 minutes, then starts coughing, then just dies. Wait a few minutes, runs fine (only for a brief period), shuts down..repeat. Pumping with a hard bulb doesn't change anything, fuel is in carbs and filter. Like me, the other guy replaced plugs, CDI box at $400, switch primer bulbs/tanks, cleaned carbs, checked compression, stator checked, unplugged temp sensor, etc. It seems to be a hot fail condition somewhere but its hard to diagnose. Any recommendations? Its just too good of a motor to give up on. [/QUOTE]
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Johnson 3 cyl 35 hp - Runs for while then dies
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