14.5 Briggs IC Gold with Oil Back Pressure

etbrown4

Member
Joined
May 3, 2012
Threads
5
Messages
12
I have an otherwise good running 14.5hp Briggs IC Gold on a craftsman mower.

It has low hours and starts and runs easily.

For some reason, I'm detecting some pressure in the crankcase. There are two signs of it......A fair amount of oil leaking somewhere around the OHV cover, and when you shut off the motor,and open the oil filler, you can hear a whoosh sound like there may have been a few psi of pressure built up there.

Shame on me, I've been occasionally working on small engines here and there for over 50 years and this is my first encounter of this type!

Tips are most welcome!

14.5 Briggs IC Gold with Oil Back Pressure
 

Rivets

Lawn Royalty
Joined
Mar 11, 2012
Threads
55
Messages
14,810
Most common problem with these symptoms is a blown or about to blow head gasket. All of the manufacturers are working on a better way to seal between the cylinder and overhead valve compartment. Not a hard fix, for a good mechanic. Toughest part is resetting valve clearance.
 
Top