OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines B&S 12.5 HP I/C Quiet, exhaust valve retainer.

I am optimistic that we will see some rain at some point and am getting my ride on's up to scratch.
This engine has done a lot of work, and I have at times overworked it on hot days as well.
Its symptoms were, once at operating temperature, would run rough & was missing quite a lot.
Also wouldn't idle - just stall. You could still mow with it.
I had cleaned the carb, changed plug and magneto, with no change.


I am trying to remove the exhaust valve and haven't come across this type of retainer, how do I get it off?



The bore is scored and I can just pick up the largest scratch with my fingernail.


I have already got the parts list and manual from the BS site.


As usual, all comments are appreciated
from Mark