Fuel float in the carburetor being stuck in the open position due to gumming (caused by stale fuel) or debris. It may smoke a bit until you use up the next tank of gas. Gas mixed with 2 cycle oil was accidentally put into my Toro lawn mower. needless to say it did not work well. It was a cast-off from a relative who was tired of taking it in to get the "gasoline in the oil" problem fixed. I was informed that the can was mislabeled. And if so, where would be the places to check? The fuel shut-off valve isn’t closed properly. barbchenoz, I have a craftsman model 247.288841 19.5 horse riding mower with a Briggs one cylinder engine. The gas was coming out of the air filter. Can gas get into the oil somewhere? If it make you feel better you could put in a Gas Treatment and that will help clean out the oil and clean the carburetor out too. Pour it out into a bucket and then put some 10W-30 oil in. Now it will not start. accidentally put diesel in tanks. The fuel filter did not look like it was getting any gas. Not likely the problem ; it has a little oil in the same gasoline ; you may see a little blue smoke when it is running. Under the mower is a drain plug you unscrew. This should clear any gas in the cylinder. I spent an hour doing the wrong thing and trying to start it. @#) ! Smelled like gas. Lawnmower died so I accidentally put gas in the oil tank and tried starting it! Hi, older craftsman riding mower 12 HP Briggs and Stratton engine. She put the gas in the oil reserve (! Tell your son to be careful when fueling lawn mowers. If you notice gas mixed in with your engine oil, follow these instructions to address a potential leak. Thanks very much for any help. I got this forum because your members helped someone a while back with a lawn mower. This new lawnmower I've never used before.. its a johndeere 100 series riding mower. Had some serious backfires. So i was mowing the lawn and barely got a lap before the mower ran out of gasoline. You haven't started it yet? Put some gasoline in the gas tank and run it. The last repair actually worked, but by then my sister-in-law was exasperated... - Craftsman Riding Mower I shot starter fluid down the carb and it smoked the yard. Now I'm about to replace the lawn mower, which won't start, and is also not mine, and … It is a new mower, just used one tank of gas and my daughter was filling it with gas------. When I have been short on gas , I have added at least 50 % 2 cycle gas to my 4 cycle mower to finish the lawn. We have a total of 3 mowers right now, from grandparents for free. In my lawn mower, I accidentally put gasoline in the oil compartment. ... 1 decade ago. Before attempting to start the engine, make sure to drain the oil and remove the spark plug. You should only use fuel intended for it and you should avoid fueling the mower when it is hot. We drain the fuel tank and replaced the fuel filter. I accidentally put gas/oil mix in my lawn mower. Can it be repaired or is - Answered by a verified Technician. Went to change oil after sitting over the winter and when I removed the oil plug, the oil poured out almost looking like dark water. Then hold a paper towel over the spark plug hole and turn the key to the start position. Just drain the oil out, put fresh in and you should be OK. Drained the diesel ad put in gas. Let the engine turn over a few times. ... Accidentally put a small 20z bottle of engine oil in 5gallon gas can for lawn mower, thought it was fuel stabilizer. When I finally found out I was ruining the mower, I quit and took out all the mixed gas and tried to dilute it with the right kind of gas. since that time it is filling the crank case with oil. Let the engine sit over night to allow the gas to evaporate. i have a John deer D130 with B & S engine. 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