Good evening,
Mower: 2014 Craftsman T3000 / Model 917-203900 with 440 hours. Engine is a 22 HP Briggs platinum / Model 44R677 Type 0021 G1 ( info from the valve cover).
so i have been chasing a small misfire/backfire in this mower for a few weeks now. Some suggested adjust the valves. I have...