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My neighbor borrowed my lawn tractor and stopped on a hill and now the tractor is blowing out large amounts of white smoke. I did an oil change after to try and see if that stopped the smoking but to no avail. Any thoughts on what could be or how to repair? My father in law says to just let it burn off but wanted to get another set of opinions and post a video below
Thanks!
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White smoke is caused by oil burning. I recommend checking the oil level. If the oil were over filled, it would cause the engine to smoke. Once you have the oil level set to the proper level check the air filter. If the engine was over filled with oil, it could have soaked the paper air filter with oil. If the air filter is soaked in oil or dirty, you need to replace it. Before installing the air filter start the mower and let it run for a few minutes. This should clear all of the oil out of the carburetor and muffler. The mower should be done smoking at this point. If the smoking has stopped, reinstall the air filter. The mower should be back to normal.
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I have had this happen, it is probably a flooded carburetor/excessive gas. The slope/angle of the hill can cause your float in the carburetor to be at an odd angle and to work how it was designed to (on a level surface) and with extended use, it will let more gas in than normal.
I would also let it burn off.
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you could try draining the carburetor bowl, normally there is a small access/purging screw that you would use for winterizing it to drain the gas from the carb.
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Your neighbor stopped on a hill and what? Did he stop because all of a sudden the motor started smoking? Did it start running funny all of a sudden? Never saw any smoke before? Did you change the oil over on the hill or drive it back to a flat area, and if so does it run OK, or does it have less power? Has the amount of smoke changed? How long have you run it while smoking? 1 minute, 10 minutes, 30 minutes? Still smoking?
Yes, white smoke is from burning oil. Did your neighbor put 2 stroke mix in it by mistake? Change the gas.
You said you changed the oil, I assume on a level surface, and I assume you know how much to add and how to check it. What did the oil look like that you drained? Did you drain it into a clean pan and look for bits of metal? Why not?
Again, I assume you changed the oil on a level surface, because otherwise you'd overfill it which would splash too much oil on the cylinder from the crankcase, which might get past the rings and smoke. Check the oil on a level surface.
It doesn't sound bad, but the video has it running pretty fast. Does it idle smoothly. A quick check for worn or broken rings and or worn valve guides is a compression test - pretty easy on a small engine. If that rules out something broken, and the oil level is correct, it should burn off.
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It may have burned rings and getting to much oil on top of the piston and need new rings.
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