briggs engine problem

ernierMarch 29, 2010

I have a briggs 18.5hp riding mower engine that builds up gas on the head causing to much compression. I take the spark plug out and crank to clean out the gas and once reinstalled can start engine but runs way to rich with gas. Rebuilt the carb all except new intake seat. Can anyone help?

Thank you for reporting this comment. Undo
walt2002

Well if you have gas in the cylinder then it almost certainly is in the oil as well. IF the oil is contaminated with gas, engine will likely fail as many do. You need to install an inline gas shut off valve and use it when the engine is not running.

These engines typically run lean so you do have a problem. You may need to check that the carb float doesn't have a hole in it. If it does, you should be able to hear gas sloshing around in it when you shake it. Check the seat but unless it has a big pc of debre stuck in it, even a leaking needle and seat shouldn't leak so badly to caust the symptoms you describe.

Walt Conner

    Bookmark   March 29, 2010 at 6:23PM
Sign Up to comment
More Discussions
Champion Spark Plug lack of quality
Picked up a set of RJ12C's to have on hand when I do...
yt125
Snapper commercial refurb
This is the 1986 snapper 21500PC that I found in the...
snapperfreak
Craftsman ZTS 7500
Going to look at a used one of these tomorrow. Anything...
radlee30458
Mclane 20" mower at Sears... why so inexpensive?
Hey everyone, I want to get yall's input on a mower...
bobbarker14
New Toro Push Mower?
I am looking to replace an 11 year old Toro Recycler,...
seashells18
© 2015 Houzz Inc. Houzz® The new way to design your home™