You haven't started it yet? 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. It may smoke a bit until you use up the next tank of gas. I accidentally put gas/oil mix in my lawn mower. It was a cast-off from a relative who was tired of taking it in to get the "gasoline in the oil" problem fixed. Just drain the oil out, put fresh in and you should be OK. Then hold a paper towel over the spark plug hole and turn the key to the start position. Lawnmower died so I accidentally put gas in the oil tank and tried starting it! Tell your son to be careful when fueling lawn mowers. needless to say it did not work well. Drained the diesel ad put in gas. I was informed that the can was mislabeled. Let the engine sit over night to allow the gas to evaporate. The fuel shut-off valve isn’t closed properly. Now I'm about to replace the lawn mower, which won't start, and is also not mine, and … This new lawnmower I've never used before.. its a johndeere 100 series riding mower. Pour it out into a bucket and then put some 10W-30 oil in. Can it be repaired or is - Answered by a verified Technician. You should only use fuel intended for it and you should avoid fueling the mower when it is hot. 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 drain the fuel tank and replaced the fuel filter. The last repair actually worked, but by then my sister-in-law was exasperated... - Craftsman Riding Mower Thanks very much for any help. Under the mower is a drain plug you unscrew. If you notice gas mixed in with your engine oil, follow these instructions to address a potential leak. My neighbor mistakenly put diesel fuel into a new Kubota riding lawn mower that would normally require gasoline. Hi, older craftsman riding mower 12 HP Briggs and Stratton engine. Now it will not start. I spent an hour doing the wrong thing and trying to start it. It is a new mower, just used one tank of gas and my daughter was filling it with gas------. It would not continue to run. Smelled like gas. Before attempting to start the engine, make sure to drain the oil and remove the spark plug. accidentally put diesel in tanks. We have a total of 3 mowers right now, from grandparents for free. Put some gasoline in the gas tank and run it. Favourite answer. Let the oil drain into a pan. I'm 17. i have a John deer D130 with B & S engine. Let the engine turn over a few times. I got this forum because your members helped someone a while back with a lawn mower. @#) ! Since you've got gas in there make sure the mower is cool when you do it. 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. ... Accidentally put a small 20z bottle of engine oil in 5gallon gas can for lawn mower, thought it was fuel stabilizer. since that time it is filling the crank case with oil. Gas mixed with 2 cycle oil was accidentally put into my Toro lawn mower. And if so, where would be the places to check? ... 1 decade ago. The gas was coming out of the air filter. I shot starter fluid down the carb and it smoked the yard. Had some serious backfires. In my lawn mower, I accidentally put gasoline in the oil compartment. barbchenoz, I have a craftsman model 247.288841 19.5 horse riding mower with a Briggs one cylinder engine. Fuel float in the carburetor being stuck in the open position due to gumming (caused by stale fuel) or debris. This should clear any gas in the cylinder. So i was mowing the lawn and barely got a lap before the mower ran out of gasoline. The fuel filter did not look like it was getting any gas. 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