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Small Engines (Lawn Mowers, etc.)/john deere lt 133 blowing white smoke then runs rough


My mower is blowing white smoke and sounds like its struggling to run. If I turn the mower deck on it kills the engine. If I just drive it then shut it off and try to start it again it won't turn over unless it sits for half an hour has oil and gas

Is the oil level correct?  Does the oil smell like gas?

White smoke is a sign of oil burning.  It it very common these days for carburetors to leak gas and the gas enters the engine oil where it thins the oil which causes it to seep pass rings and valves where it gets burned.

Is the spark plug black and sooty with squishy gunk on it?  The spark plug should be a light brown color on the tip.

Let me know.

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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