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03-08-2009, 11:23 AM
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#1 |
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Getting Wild
Join Date: Nov 2008
Location: Louisville Ky.
Posts: 99
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92 Marathon sluggish and backfires
Check out this video of the motor running. Sometimes its really sluggish, and it backfires. Its kind of making a liar out of me, because its really a hit or miss problem, thats what leads me to the coil breaking down. What do you guys think?
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03-08-2009, 11:30 AM
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#2 |
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****tard supreme
 Join Date: Jun 2008
Location: waldo,wisconsin
Posts: 5,401
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Re: 92 Marathon sluggish and backfires
well its running lean for some reason, crap in the carb, vapor lock! my guess is its in the fuel delivery some were.
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03-08-2009, 11:40 AM
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#3 |
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****tard supreme
Join Date: Jun 2008
Location: waldo,wisconsin
Posts: 5,401
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Re: 92 Marathon sluggish and backfires
are they putting methanol in the fuel down there? ez go 4cycles don't like to run on that mix.
its in the lower grades here in wisconsin and my engines will pop like that! i drained the fuel and went to the 93 octane with out the meth and it cleared right up. just my 2 cents |
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03-09-2009, 12:01 PM
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#4 |
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Getting Wild
Join Date: Nov 2008
Location: Louisville Ky.
Posts: 99
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Re: 92 Marathon sluggish and backfires
Im not sure, ill have to look into that. Thanks for the advice!
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03-09-2009, 12:51 PM
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#5 |
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Gone Wild
Join Date: Jul 2008
Location: Reddick IL
Posts: 11,220
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Re: 92 Marathon sluggish and backfires
Pizza is right you are lean, spits back. No accelerator pump so you have to run the idle air screw rich on fuel, you may even need a larger pilot jet.
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01-19-2011, 12:43 PM
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#6 |
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Getting Wild
Join Date: Jan 2011
Location: Dayton Ohio
Posts: 130
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Re: 92 Marathon sluggish and backfires
From the sound and experience with 2 strokes it a lean condition. Thats why the slow response.Try pulling the choke partly on and see if it helps . That will confirm for you.
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