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Put wrong oil in lawn mower. What now?
I put in 10W - 30 motor oil into my mower by mistake. It ran for about 25 minutes and then it started smoking and now it won't start. I emptied the oil out and put in what I thought was the right kind but it still won't start. Anything I can do or did I just kill my engine?
Thanks,
Rich
It's a riding lawn mower btw.
Okay I will try replacing the spark plug. thanks.
Checked the spark plug and it didn't seem to be firing. Cleaned to the best of my ability still no luck. Bought a new spark plug. Still no go. Left plug out but attached to cable thing and grounded to motor(someone told me to do this) and no spark. Seems like the sparkplug isn't firing.
7 Answers
- Anonymous1 decade agoFavorite Answer
Many riding mowers will take 30 and 40 weight oil. I don't believe the oil is your problem.
- renpenLv 71 decade ago
It sounds like you put too much oil into the crankcase. Check the oil level with the dipstick. If it is over the full mark drain some out. Never over fill the crankcase. If you do the oil will be pushed out through the crankcase vent tube into the air box through the air filter and into the the engine. That is what makes it smoke. Now remove the air filter and check it for oil. If it has oil on it replace it. Clean any oil from the air box. Clean the spark plugs and it should be good to go.
Never over fill the crankcase. The type of oil is not the problem it is the amount. But use 30wt, it is the recommend wt.
- 1 decade ago
I agree your oil is not the problem, since it smokes (maybe the way u changed oil some oil or gas got in your combustion chamber and it didn't burn all of it thats why it smokes), now your spark plug have deposits in it, put new spark plug it should work fine.
- 5 years ago
The leaking problem is not because of the viscosity of the oil, you likey didn't get the plug back in tight before you put the new oil in. You are supposed to use SAE-30 oil in lawn mowers. 10W-30 is for cars.& other light vehicles.
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- William BLv 71 decade ago
more than likely you over filled it, that's why it smoked,
use SAE 30 wt only, in small engines
replace the plug its probably fouled .
Source(s): old timer/maint man
