After 8 months I finally have has a few minutes to work on my hard starting, backfiring WC. Restarted after setting many years, the tractor allegedly ran good then started missing. I rebuilt the carb finding worn needle and sunken float. When I put it back on it still backfired and would not run at all. I cleaned and rest the points, installed new condensor, retimed the mag - that made it worse. I then retarded the spark as far as possible. It then started puffing through the muffler not the carb so I suspect the timing has jumped a gear. I did get it to run for 10 seconds (twice).
Now, as soon as the carb gets full of gas, gas runs into the throttle opening and out the drain hole. While this seems to have helped with the starting thing (I had to turn the idle jet way in and the high speed jet way out to get it to run), raw gas dripping out of the carb is not right. I pulled the bowl, the float is dry and known to work (came from another of my tractors that actually ran), it has a new needle, seat, and gasket.
What have I missed?
Oh, it does this no matter how little gas is in the tank, or how much the fuel feed is cracked open. If it sits more than 30 seconds fuel starts running out (and I'm not talking a drop or two).
When my wife has a minute, and it stops raining, I'm going to use pipe dope on the needle seat threads, reinstall it, seat the needle by hand, and have her turn on the fuel. If that stops the gas flow I'm going to lower the float and hope for the best. Any other suggestions? Thanks guys.