oil leaking through the muffler

[davhendricks]

Oil is coming through the muffler. What should I do?

 

[bertsmobile1]

Oil is coming through the muffler. What should I do?

Check the oi level carefully. if OK.
Run the engine for 15 minutes out doors after dark near the fence of the neighbour you don't like.
If it does not clean up then repost with the full details.
equipment name & model number and the same for the engine.

 

[natenkiki2004]

I've seen this happen when the mower is sat on it's side or tipped in a funny way for a while, like in storage. The valve seals aren't perfect and oil will tend to creep around where it shouldn't be. If you haven't ran the mower yet, I would suggest removing the spark plug and cranking over the engine, it may shoot out oil. I suggest this because oil (and liquids in general) aren't compressible and when the piston reaches the compression stroke, if the engine is rotating fast enough, it could cause strain on the connecting rod or other parts. If you have run the engine, just keep running it until the oil burns off, once it does, it shouldn't happen again. If it does, you may just have to live with it or move to a thicker oil like straight 30 weight. The only thing that would cause it really is faulty or heavily worn valve seals or piston rings and in either case, it's a pretty big task to replace those.

 

[bertsmobile1]

I've seen this happen when the mower is sat on it's side or tipped in a funny way for a while, like in storage. The valve seals aren't perfect and oil will tend to creep around where it shouldn't be. If you haven't ran the mower yet, I would suggest removing the spark plug and cranking over the engine, it may shoot out oil. I suggest this because oil (and liquids in general) aren't compressible and when the piston reaches the compression stroke, if the engine is rotating fast enough, it could cause strain on the connecting rod or other parts. If you have run the engine, just keep running it until the oil burns off, once it does, it shouldn't happen again. If it does, you may just have to live with it or move to a thicker oil like straight 30 weight. The only thing that would cause it really is faulty or heavily worn valve seals or piston rings and in either case, it's a pretty big task to replace those.

I consistantly tell & show my customsr how to lift & tilt their mowers yet they still lift them out of the boot where they have been sliting on their sides ( cause they don't want get the boot dirty with all the cut grass they haven't bothered to clean off the bottom of the mower ).
After telling me the synptoms I always ask to be shown.
So then the lazy owners give the starter a hefty pull and blow a head gasket or bend a rod.
I used to just write down what they said but found too many engines that had already had a seizure or a bent rod the ex- customer was trying to stick me with.
Cant remember just how many have come in with a filthy mower, dirt encrusted air filter yet brand spanking fresh oil in the siezed engine.
Nice thing about working for myself is I don't have to work with corrupt dishonest customers

 

[bertsmobile1]

And don't forget that most B & S engines do not have a valve stem oil seal on the exhaust valve.

 

[natenkiki2004]

And don't forget that most B & S engines do not have a valve stem oil seal on the exhaust valve.

I did not know this, thanks for the info.