Briggs 104M02-0005-F1 engine on a Snapper walk behind 12AVB2A2707 SER 1K195K31260. Customer brought it in and said it sounds like it is knocking and low on power. Sounds like the knock sound is coming from the carb. Any idea what it might be.
Since OHV probably not a bad idea to check valve clearances. Also if the flywheel key is partially sheared and firing at the wrong time could be popping back out the intake into the carb.
