Farmall Cub won't start (long post)

Posted by Point on March 29, 2011 at 14:15:12 from (98.110.185.17):

Just bought a 1948 Cub yesterday. I heard this tractor run in October 2010. It sounded good, although I know the motor has low compression. He told me he was selling it as non-running. I asked him why, because I had heard it run in October and he said because it has been sitting. When I picked it up, I brought a can of gas and a battery and I said to him, I'll drive it on the trailer instead of winching it. He said I don't think it's going to start...I don't know if I took the magneto out of this tractor. I really think he knew more than what he let on, but I don't think he thought it was serious. I have spark, but it seems to be intermittent. It backfires and seems to be out of time. I watched the video on how to time your Farmall Cub with a magneto, and followed the instructions perfectly, but I cannot get the mag to snap when I'm adjusting it like they did in the video or like it says in my book. The #1 piston is at top dead center and I did everything else right as in the video, and there is spark, but it just seems out of time. I had a mechanic friend look at it and it did the same for him. He seems to think the mag needs to be rebuilt, but I'm not so sure. Is it possible the govenor is out of time...it could have jumped a tooth?? I know this motor is tired, but like I said, I heard this tractor run in October and it was smooth as silk and not smoking, but did have low oil pressure. This Cub is in decent shape and has a sickle bar. I don't want to put hundreds and hundreds of dollars into it, but I don't want to have the mag rebuilt and then it still doesn't run and it's an internal motor issue. Any advice would be appreciated. Thanks.
PS: It will fart and run for a second at times, but it sounds out of time to me.

Replies:

• Re: Farmall Cub won't start (long post) Janicholson 18:17:43 03/29/11 (0)

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