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Last weekend my wife mowed on Friday evening and she says tractor ran fine, I went out Saturday morning and tried to start it and it made a banging noise and started backfiring and blowing black smoke, it also would not run higher than an idle. Checked plugs and they were black. These were plugs that I just put in this spring and probably only had 15-20 hours on them. I also checked the air filter it was relatively clean. Changed plugs and blew out air filter. Tried to start again. It ran smoother at idle but still would not run above idle and still blowing black smoke. Due to the fouled plugs and black smoke I am thinking carburetor. Or possibly the coil. Any ideas?

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  • Craftsman Master
  • 1,807 Answers

Black smoke would indicate it is burning oil, Has the machine been working on an incline.? check valve clearences. My guess is that oil is somehow getting into the cylinder.

Posted on Jul 30, 2013

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6ya6ya
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Posted on Jan 02, 2017

wadembly
  • 448 Answers

SOURCE: Hard start or won't start

the float in the fuel bowl might be getting stuck what you can do is push & pull on float to see if it flows if not the replace the float if i can help further e-mail me wade @ wadembly@aol.com

Posted on Jun 28, 2009

wadembly
  • 448 Answers

SOURCE: Craftsman Lawn Tractor/ hard start/ whitish smoke

does it turn over slow or fast if it turns slowly thats the problem so it could be battery or starter they have to have a good amount of rpms to burn fuel right when starting if not it floods out the engine with gas hope this helps thanks wade

Posted on Jul 05, 2009

  • 146 Answers

SOURCE: Tractor wont start

For a small gas engine than won't start, think FAST -- Fuel, Air, Spark, Timing. You've replaced the filters and spark plugs and squirted in some starter fluid, eliminating the simple common fuel, air, and spark problems -- but I because of the backfiring I think your problem is in the timing -- like a sticking valve. Probably more than you want to tackle at home, but might not be as expensive as an engine replacement. Take it to a good small engine mechanic -- best bet is a lawn equipment shop that has been around many years. Drive a little farther to get to one if necessary.

Posted on Jul 03, 2010

stapes613
  • 6 Answers

SOURCE: Craftsman 26 hp Kohler engine 54

to be honest the enigne ahas a control that the left side must fire and run before the right starts to fire it sounds to me like you have a fuel issue possibly the carb. is gummed up and dirty.

Posted on Jul 28, 2012

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