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I have CraftsmanLT1000 lawn tractor, Smokes heavily.

I have CraftsmanLT1000 lawn tractor, it starts well and seems to run fine initialy but then starts to smoke a lot. Any ideas? Tractor is approx. 6yrs.old, it has 18hp ohv engine (Briggs&Stratton)

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Many times a dirty air filter will cause this on this style of engine. When the filter is plugged, it creates a 'rich' fuel condition, and the engine smokes heavily, the excess carbon is drawn into the air filter, and plugs it even more.

check spark plugs, air filter, fuel filter, choke linkages (for full choke/no choke operation) and crankcase oil.

Crankcase oil can become fuel contaminated, thus overfilling the crankcase and filling the crankcase breather with raw oil/fuel, and this is drawn into the air filter, plugging it, and starting this senerio.

If there is fuel in the crankcase oil, drain completely, and refill with fresh oil. Then you need to look towards the carb for an inlet needle sticking, broken, worn.

Posted on Nov 16, 2009


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