?
Manage My Life

why am I getting oil on my spark plug

its on a 18.5hp Briggs & Stratton engine on a lawn mower

Tags
Lawn Mowers
Sign in to answer a question
4 Answers from these members:
Manage My Life
I can understand your concern on the oil getting into the spark plug. To get the best possible answer please submit more information like what is wrong with the mower and the model. Click on reply with additional information. An expert will respond withing 24-48 hours.
by Manage My Life
June 19th, 2012
Answered in 9 minutes
Comment
0 votes
Jerry C
Hello Thomas,

I would like to assist you with your question. There are a couple of reasons a spark plug can become oily. The first reason is from the piston rings and cylinder being scored and oil leaking past them while the engine is running. Engine compression is usually adversely affected by this and the engine tends to lose power. Another reason can come from overfilling the engine with oil. This causes the crankcase ventilation system to blow oil out of the diaphragm and into the intake. A failed crankcase diaphragm can also cause this issue.

Is the engine smoking while running? There are a lot of possibilities and if you would like to reply with any other details, I would be happy to narrow it down to the cause with you.

Please let me know if I can assist you further.

Jerry C
by Jerry C Earned 317 community points in Lawn Mowers
June 20th, 2012
Comment
0 votes
Manage My Life
I was mowing the lawn.The lawn mower started smoking and stopped running.When I looked at the air filter it was soaked in oil and so was the spark plug.I know the 2011 troy built pony was not overfilled with oil when I started mowing.I replaced filter and the spark plug.It soaked the new plug with oil ,but would not start.I hope you can help me. Thanks
by Manage My Life
August 29th, 2012
Comment
0 votes
Jerry C
Hello,



From the description, it appears that the crankcase vent has failed. If you would like, I would be happy to assist you with diagrams and parts if you reply with the model number of the engine.



I look forward to assist you further.



Jerry C
by Jerry C Earned 317 community points in Lawn Mowers
August 30th, 2012
Comment
0 votes
Didn't find what you are looking for? Ask a question