So I'm finally getting around to getting my 715 back up and running. Its been torn down for all sorts of different things.
So I've had this carburetor/engine problem ever since I installed the 2-barrel carburetor and intake on the stock 230 engine. I've been messing with trying to fix it for a while now, but nothing has worked.
The engine idles and runs fine at all RPMs, the problem is when I am decelerating, or engine braking. I get massive popping and backfiring out the exhaust. Not like once every now and then, but quit frequently EVERY time I try to slow down while using the engine. Does this make sense? You know, when your going down hill and you go from 4th to 3rd to slow down or keep a constant speed?
The engine timing has been checked several times, and matches what the manual says it should be at. I've messed with fuel ratio, tried different rich/lean mixtures. I have tuned the carburetor to the best of my ability by listening to when the engine sounds and runs the best.
Any suggestions? Is this problem indicative of too rich or lean of a mixture? Is there a more technical way of tuning the carburetor? Any help would be appreciated.