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Gas somehow is getting into oil reservoir. Twice now. Initially thought it was operator error. After second time, know it is the mower. Craftsman 17 hp 24 inch riding.
Re: Gas somehow is getting into oil reservoir. Twice...
I would check the carburetor float to ensure that it stops gas flow once it is full. It is possible that the float is stuck and gas is getting to the top of the engine and getting past the rings.
Gary
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Fortunately, the engine oil doesn't go through any rubber hoses, so they are mouse-proof. The oil probably leaked out through an engine seal. Oil on the engine surfaces would smoke when it gets hot. Check your oil level and top it up if necessary, before you run the engine again. The engine can run fine even with a slow oil leak; you just have to watch the oil level from time to time. The leak could be easy to fix - by tightening up a few bolts -- or expensive.
The gas runs through rubber hoses, though. If mice ate through that, I think you would have smelled the gasoline, and the engine wouldn't run for more than a few seconds. But if you see a severed hose, you should replace it. Take it off and bring it to a mower shop or auto supply shop, and buy something the same diameter. Inexpensive.
Hope this helped! If so, please rate my answer, thanks!
Same thing happened to me with my 26 horse kohler craftsman. Replaced EVERYTHING (spark plug, fuel filter, oil filter, and degunked the carborator), and still was flooding. It ended up being the flywheel key. Cheap part, quick fix. I guess it can happen when you hit something hard with the deck, or it can just happen without reason... I hit a snowbank hard with my snowblower attachment, but I didn't even realize it until afterwards because it kept running fine. Supposedly, even after the strain to the engine, it won't always stall out. It will keep running (but maybe rougher) until you shut it off. Then when you go to start it again, you will have no luck because all the timing is out of whack. It cost me $80 to have a repair company fix it. I think the part was only $5.
I think that this is a 4stroke engine and runs on neat petrol.Have you been putting oil in with the petrol like a 2 stroke engine needs because this would account for the smoking.If not the check that you havn't overfilled the gearbox oil.
i think i'd look for a new repairman - did you check the oil? maybe he didn't put any oil back in it! or maybe the carb float stuck and the crankcase is full of gas. lift the hood and look for burnt wires or at the deck for a burnt belt - try to turn the engine over by hand [the round center with the perforations]. does it click when you try the key? if, not, check the fuse. without knowing the area that the smoke came from it's hard to single out a cause
ran into this problem twice this season, about drove me crazy - finally traced the problem to the anti-backfire solenoid [the little cylinder at the bottom of the carburetor that holds the float bowl on] - after running fine for 20 minutes or so [it varied], the coil would release the plunger and shut off the gas flow. as soon as you turned off the key and turned it back on, it would start back up - replace the solenoid and problem vanished
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