Exmark 22.5hp blowing white

[bentrim]

OP It would help if you posted the engine make and model all manufactuers made an engine with 22 horsepower.
If we are told this information someone who is knowledgable on certain makes and models may know of a the problem area of the engine, and be able to give you better advise on the issue.
Kohler had ring and head gasket issues.
Kawasaki changed the breather
These things are just some engines that had issues, note I said no specific models.
Note a breather issue will allow the crankcase to become pressueized and push oil thru the line to the carburetor, the engine ingests the oil and---smoke.
The crankcase should be under a slight vacuum.

Please note -- Large shaky fingers sometimes hit the wrong or more than one key. Sorry for any misspellings I never excelled in spelling either.

 

[Forest#2]

As Rivets indicates in post #17.

Post up the engine model, type, code (especially the code)

The rings on some had a parts number change per the code.

 

[borisdmower]

When mine went it was the oil scrapper ring, belching white smoke everywhere, couldn’t see the front of the mower. Crazy thing was, the bore and compression rings were spot on.

 

[Gord Baker]

Severe amount of white smoke problem is this winter I rebuilt it split sump everything looked great new head gaskets and the valves were lapped to remove little pitting today I put the engine back on and it is still smoking like last year I have checked the read valve seems to be working as it should I am at a loss I unscrewed the oil dip stick and cranked it over and oil shot out the tube so I pulled the flywheel and the breather I do t see a clog anywhere I am so confused on this any info would be great

I am not familiar with this engine. Is it Liquid cooled? If not, perhaps you have some water in the fuel. Do a compression check or Pressure test the Crankcase.

 

[Gord Baker]

After some talk with my friend i think I left out a big part when the dipstick is removed it will shoot oil out for a distance so I do believe and agree with my friend that the rings are somewhat compromised I will be removing and disassembling again and will inform the forum

Check for CrankCase Vent FIRST.

 

[kbowley]

Someone asked me one time if I smoked after sex. I told them "I don't know - I never looked".

 

[kbowley]

With a Briggs engine producing white smoke, my initial focus is on the head gasket(s). With that in mind, and based on your work, my next action is to detach the breather tube from the air cleaner and see if it expels oil. Try switching the valve covers to check the breather tube on the other cylinder. To summarize, the crankcase pressure is too high and is finding a path of least resistance for escape. The cause of the pressure is the puzzle in your instance. The leak-down test shows no issues with rings, warping, or cylinders. It’s possible that the oil pump bypass valve is obstructed (pump replaced) or that oil is leaking through the valve guides. My thought process leads me to a defective breather valve, oil pressure bypass valve, or valve guide.

 

[kbowley]

A personal request: When you post, please use sentence punctuation and capitalization. Not readily knowing where sentences end and begin makes it more tedious to read and understand, and increases likelihood of confusion about what is being explained.

Thanks.

Just wanted to check in and see if the grammar in my casual response in the previous post is up to your standards .

 

[Combat_Pyro]

I’m seeing a lot of questions about the head gaskets, but no one mentioning the fact that it blew smoke before and after the heads were done. To me that sounds like a PCV valve might be bad. I don’t know if that engine has one or not but if it does it’s usually pretty simple and cheap to change. I’d check that out before anything else.

 

[kjonxx]

over filled with oil will also cause this, maybe leaking carb N+S