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Craftsman LT1000

mowerHelp's Avatar

Join Date: Mar 2008
Posts: 1

03-01-08, 01:24 PM   #1  
Craftsman LT1000

I have a Craftsman LT100 w/Kohler engine. It sat for a while (couple of years) It starts fine but it backfires through the exhaust. When I engae the blades and put a load on it it runs fine, but after I release the load it backfires. Does this mean the timing may be a bit advanced, if so how do I set the timing. Any othersuggests would be helpful. I have already cleaned the carb.

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31YTech's Avatar

Join Date: Feb 2008
Posts: 1,263

03-01-08, 03:05 PM   #2  
Sounds like you need to clean the carb out again, Make sure ALL ports and passages are fully open (main jet) for sure.

Use carb & choke cleaner with the little straw to spray through the the ports/passages and jets.

With it sat that long the carbon build-up on the piston/head could have dried out then broke loose and a piece got stuck under the exhaust valve. A cylinder leak-down test would show if this is the problem.

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