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Old 01-01-2014, 02:55 AM
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Default Question on smoke
I have nothing to compare this to but on our 126 any time you throttle up really fast I get a puff of black smoke. It's always done this that I can remember but was wondering if anyone else's Kohler does this. I would be inclined to think it's just fuel vs oil smoke??
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Old 01-01-2014, 03:17 AM
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Black smoke is unburned fuel. Sounds like its running a little rich. What does the end of the spark plug look like?
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Old 01-01-2014, 04:38 AM
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Black smoke is unburned fuel. Sounds like its running a little rich. What does the end of the spark plug look like?
Agreed, and to an extent this is what you want for your air-cooled engines.
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Old 01-01-2014, 11:43 AM
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Black smoke is unburned fuel. Sounds like its running a little rich. What does the end of the spark plug look like?
Spark plug Is where it needs to be - tan. No fouling anywhere that I could see.
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Old 01-01-2014, 11:44 AM
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Agreed, and to an extent this is what you want for your air-cooled engines.
Never heard you want air cooled engines to run richer, whey is that?
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Old 01-01-2014, 11:57 AM
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It makes an engine run cooler running a little rich, obviously you don't want to overdo it,to me it sounds like your engine is running about right.
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Old 01-01-2014, 12:55 PM
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Are you running any fuel additives in your fuel mix--such as MMO or Startron or Stabil?

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Old 01-01-2014, 04:38 PM
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Never have however as of recent I put some seafoam and a lead additive in the tank but as stated it has always done this so I don't feel the additives are the culprit
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Old 01-01-2014, 05:01 PM
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As long as she is running OK, don't over think it. It will drive you crazy and you will spend more than it is worth to fix something that is really not a problem.
Remember that you have a machine that is 40 years old, she has done a lot of work and does not have all of the "new" technology behind it, so a little smoke won't kill anyone.
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Old 01-01-2014, 06:21 PM
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I think it will be ok its just giving it a little extra kick of fuel when opened up as long as it clears up right away and your plug is where it should be I wouldn't worry to much. I always run mine a hair rich to keep temps down and I've never had a problem.
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