Briggs & Stratton intek 18 HP engine contunuously backfires

A

ajsm85

Forum Newbie
I received this mower from my brother in law it would not crank. I found that it needed a new starter. Replaced the starter and it starts but only now the mower is constantly backfiring. Any thoughts on what to check now. I have replaced a fuel line, cleaned the carburetor, adjusted the valves to .004" and nothing seems to help. Should I change the muffler ? I just can't make sense of this issue at this time. The mower has not ran for three to four years.
 
Look on the bottom of the carb and see if there is a plug for the cut off solenoid, if there is pull that off and try it. if these go bad it can cause a problem.
 
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