Heymow - Lawnmower Racing Forum

Engine Help => Briggs Flathead => Topic started by: TomC on October 30, 2005, 08:39:22 pm

Title: opposed twins exhaust valve trouble
Post by: TomC on October 30, 2005, 08:39:22 pm
opposed twins exhaust valve trouble
Post by mowmanscott on Aug 9, 2005, 6:22am


Has any one had this problem were the valve seat comes loose? and is there a fix for this? also is there any HP parts I can buy? thanks scott

Re: opposed twins exhaust valve trouble
Post by George Herrin on Aug 15, 2005, 11:08am


Yes this is a common problem with the opposed twins. Push it back in and using a center punch about an 1/8 of an inch off the seat hit it with a hammer about 8 times cirleing the seat putting dimples around it. THis is called peening. This will hold the seat in.
George