[shaneshafran]

Can anyone tell me what's wrong with it? It's a Craftsman ridng mower with a 14.5hp Briggs & Stratton engine its 7 years old good up keep & never had a problem with it. One day I strted it and smoke & oil started to pour out the muffler.

[Stratmando]

Never seen it, I would suspect cracked block.
Do you have Water in Oil, Oil in Water.
What Vehicle and Engine do you have?
Intake/Exhaust manifold Gasket, Head Gasket.
Plugs may tell you something, Also Compression Test.
Although it doesn't sound good. Doesn't mean it's Shot
Need Motor Info, Keep fingers crossed.

[ballengerb1]

Your rings are probably blown. Are we talking car, tractor or what?

[hvacservicetech_07]

It looks to me that in his question he is talking about a Craftsman riding lawnmower.

[ballengerb1]

Thanks hvac, the full explanation didn't show when I firstvread the thread. Just said oil coming from miffler. Hey, tried to apy you a compliment a few minutes ago regarding one of your answers but this darn Dell or my dial up is acting up. Kept getting an error message. Nice job.

[hvacservicetech_07]

Not a problem, I thought maybe you missed something. Thanks for the compliment!

[newaukumdon]

Fuel has leaked past the carburator and into crankcase causing level to rise. Probably a piece of debris in the carburetor. Change oil start and let run 5 minutes and do it again.

It will smoke like hell for a while. It is easy to assume the worst but trust me it happens all the time and people misdiagnose it all the time.

Don

[Stratmando]

I think question had changed, I also missed riding lawnmower.
Tought was car, you were talking about.

[Fr_Chuck]

The only time I ever had oil come out of an engine, I had a generator, that one of my "ex" employees moved for me. They were a hateful bad employee, so they stored the generator upside down, it sat upside down for about 3 months till we noticed ( it was in a wrap frame so could sit that way)

When we turned it right side up, oil was coming out badly.
A complete clean out by one of my new employee had it going good,
But will asssume a lawn tractor would not have been stored upside down.

[ballengerb1]

Strat, you aren't imagining things, when you and I first answered there were no details. NEW's answerr is definitely a possibility but I'm staying with blown rings. Keep up the good work.

[Fr_Chuck]

Well of course this is why I never answer in power tools, my idea of a good mower is one someone else is pushing. I was actually interested in what it could be myself, I had this picture in my mind of oil just shooting out of the muffler like a water hose,

[newaukumdon]

Most small engines NEVER get the hours it would take to destroy a set of rings, it happens in the odd case but rarely.

Working in the power equipment industry you come across oil out the muffler on a regular basis and it is almost always a fuel mixing with oil problem.

Don