Help with KF82

[kraushouse4]

I have a 91 club car with a KF82 flathead motor that was running before I replaced the rod in it and when I put it back together now it won't start. It is backfiring through the carb. I have aligned the marks on the camshaft and even tried turning the cam 180 degrees to see if that would make a difference. It has good strong compression and consistent spark. The only other thing I can think of is that I switched the flywheel with the one off my 86 Club Car which also has a KF82 motor, Could that be the reason this engine won't start? I have been working on this for several weeks now and am at my wits end with it!! Any suggestions would be greatly appreciated!!

 

[Zman]

the fact that ir ran before it blew up i would say you can rule out a pluggeed exhaust. How about the exhaust valve clearence? there is a little wafer shim on the bottom of valve, if it fell off you have way too much clearence and the exhast valve barely opens. this will cause a backfire in the carb . When you align the crankshaft and camshaft are both valves closed and piston on top dead center? Is the flywheel keyed the same as the old one?