MODEL NUMBER 917.275702 BRIGGS ENGINE-MODEL NUMBER 445677, TYPE NUMBER 0413-E1
24HP Briggs and Stratton V-Twin Engine.
I need help finding the issue, so that way I don't put more money than what I need into this engine. It backfires through exhaust, not intake. I tore the entire engine apart, because from what I read I had believed it to be a cam shaft worn. Cam looked great, everything inside the case looked great, put it back together with a whole new gasket kit, cleaned up the heads, the valve seats look good, the valves aren't bent, the push rods are straight, valve lash is great, no troubles there. It has spark on both cylinders, but if you pull #2 wire off while running, she shuts off, pull #1 it stays running and no changes. #1 plug is always wet, with fuel. I took the carb apart, and cleaned it and put new gaskets in, what I did notice was the one "jet" was bigger than the other, so I put the smaller looking jet in the side that had the bigger looking jet to see it someone rebuilt this carb and messed up. Still the same thing going on. I've never removed the flywheel because I don't have the right tools to pull that off, but the key looks to be where it should be and not sheared off.
Got fuel, got spark, but #1 plug is always wet, and backfires. I don't know what else it could be from what I've done already.