My very old 9 HP briggs engine keeps fouling sparke plugs. It started running rough so I shut it off,then went to restart and it wouldnt. Put in new plug and it started and ran for about 4 hours and then the same thing happened. Whats Up?
9 HP Briggs problem
- Thread starter jimdeq
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Yep, if you are fouling plugs, it means that you are introducing something it can't get burned up. It could be in the form of oil or too rich on the carb, although I would expect it to really run like crap if it is rich enough to foul a plug in 4 hours. Sounds to me like it is valve guides or piston rings introducing oil vapor.
Jags said:
X2.... On That One.. Some people don't believe in Marvel "Mystery Oil" or other Products like "SeaFoam" or STP makes a few... These products try to "Re-Seal" Wear-Fit parts.^ ( Rings, Valve Guides) ^..But depending on how old your motor is, and how much you want it to quit burning oil "Cheaply". I would try one before dropping a Big Dime on a Rebuild.
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