Can't Keep her running (part 2)

Tractor: 1939 9N, with new electrical system minus coil. New gas tank.

Problem: Runs good for 30-40 minutes and then starts to sputter, backfire and then eventually quits. Takes 5 minutes to get it started again and then it runs good for a few minutes but then starts to sputter/backfire and then quit...etc etc etc

What I have done: Checked the gas going into Carb, good flow. Took the plug out of Carb, no gas, took air flow tube off carb and gas started to flow again. Reassembled everything, same problem as before. A small about of dirt in the fuel from the plug....One last thing, when I rebuilt this tractor this fall, I installed and in line filter between the bowl and the Carb which runs over the top of the engine, down to the carb. Not sure if this could be effecting the situation.

This happen about every other time I use the tractor. Last time was the worse. thanks for any advise
rob

Since you are leaning toward the coil as the problem, Make SURE that you tinker with the spring and tab contacts on the bottom of the new coil, slightly extending the spring and bending the tab downward A LITTLE to make sure you have contact with their respective terminals in the distributor. Otherwise, you could still be chasing spooks.

Ron, who's been there, done that.

Probably not your problem.. but an easy no cost test while you are also trying the other methods.

Soundguy

Soundguy

Your 4th inline gasoline filter is NOTCHUR PROBLEM.

Unfortunately, the squarecan frontmount ignition coil is NOT ROBUST as we'd lik'em to be..... ..Dell

I figured the coil was the problem after reading your advise in a previous message. I have heard that my Grandfather had the same problem with this tractor 30 years ago and he always tinkered with the carb to try and solve it, I bet if he was still around he would be glad to finally know what the problem was. thanks again for all the great knowledge you put out on this website.

rob