When I first start it and it's cold it doesn't surge its not until its running for 5-10 minutes it starts surging. It's probably only ran for an hour since I got it I would hope nothings cloged already but I suppose it's possible. I also noticed when I took the air filter off that it smelled...
I recently bought a briggs 875 to swap out on my lawnmower and after 2 mows it's already surging really bad. Model number is
125P02-0012-F1
What can I do to fix this problem and bulletproof the motor. My lawn is kind of bumpy and iv heard that can cause problems.