Have finally got the 39 unstyled AR back together, but for some reason cannot get her to start. Hand crank of course. Redid the engine (bored to +.090, new pistons, rings, new head [that's another story]), rebuilt the carb (totally disassembeld, made sure all drill holes etc. were clear), carb fuel level at 3/4" below top of bowl (meassued with a clear hose from the drain hole), fuel flows freely, idle needle at 1 1/2 turns out, load 1 turn out, linkage seems ok, new plugs (Autolite 3076), spark, #1 cylinder impluses when it is suppose to at the flywheel Impulse mark, valves set at .020". She will fire when hand creanking failry easy, but will not continue to run. Occasional "weak" backfire. I suspect either the operator (being me) does not know how to start it, or something is amiss. Before the teardown she was an easy starter (the teardown was mearly to repair the intake manifold and one thing lead to another).
So, any hints on troubleshooting the problem would be appreciated. I have not tried to pull start her (in my opinion, if she is properly tuned etc, she should start easily by hand). I have tried starting her so many times I've had to add oil to the cylinders as they were getting dry (flushed by gas I assume) and "sticking".
So, any hints on troubleshooting the problem would be appreciated. I have not tried to pull start her (in my opinion, if she is properly tuned etc, she should start easily by hand). I have tried starting her so many times I've had to add oil to the cylinders as they were getting dry (flushed by gas I assume) and "sticking".