Posted by FordIndustrialOwner on May 01, 2019 at 15:40:14 from (71.86.214.51):
I started to slowly have problems with my A/C C where it would miss when I accelerated, and then later the same thing would happen when I gave it more than three notches of throttle, which is about 25%. I pulled the magneto and carb and cleaned both, and replaced the plugs with the same Autolite 295 type and gapped to 0.30. Same problem. Bought a rebuild magneto and put it on, and same problem. Tested compression and its about 75 lb on each cylinder. I'm getting spark to all four cylinders. I have spark at each plug. Pulling the spark plug wire while idling does show that each cylinder is firing as indicated by the lower performance.
I'm running a Zenith carb type 83 that was originally for a Wisconsin engine but its worked great until now, so I don't see how this can be causing these new problems with missing at anything about 1/4 throttle. The engine will die after about 50% power. It seems to start and idle best with the idle screw turned all the way in, so something tells me there is some kind of fuel/air issue. I checked the float on the carb and it did seem to bind, but after adjusting it, it still has the same problem. Considered the governor but I don't see how these symptoms could point there. The only thing I haven't done is undo the hose to the carb to see if its a blocked air intake. Help.
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