The old A has it in for me

Posted by kopeck on October 31, 2012 at 09:54:55 from (169.244.197.208):

I've written about my '47 A a couple of times on here recently. I've received plenty of good advice but nothing seems to be curing my A's miss. You can see where I've been here:

http://www.ytmag.com/cgi-bin/viewit.cgi?bd=farmall&th=883199

Since that thread I purchased another Zenith, cleaned it up my self and then bit the bullet and sent the parts out to have a pro look over, install new throttle bushing and reassemble.

The results are pretty much the same. Idles like crap/can barley keep it running and starting can be tricky too. WOT is usable but still seems kind of "strained" and there's still a miss.

It still feels like fuel to me but I'm out of ideas. At this point I've:

Tried 3 different carbs, none of which made it "right".

Tried running with the air cleaner disconnected

Tried the propane test to look for leaks

Each cylinder has 94 lbs (give or take a pound) of compression with the engine warmed up.

I've checked the valve lash and everything is set to spec.

New point and condenser (H-4 Mag), tried a different set of wires and 2 news sets of plugs.

At this point it almost seems like it has to be ignition related. The H-4 makes good blue spark when I turn it over by hand. I've toyed with getting a battery ignition for it for a while, I think they run a bit better then the H-4s BUT it still should run well with the mag.

Any more wisdom?

Thanks,

K

Replies:

• Re: The old A has it in for me PretendFarmer 18:58:44 10/31/12 (0)
• Re: The old A has it in for me kopeck 18:21:58 10/31/12 (1)
  • Re: The old A has it in for me Curt Cooke 06:50:29 11/01/12 (0)
• Re: The old A has it in for me rustcollector 18:00:44 10/31/12 (1)
  • Re: The old A has it in for me teddy52food 18:33:19 10/31/12 (0)
• Re: The old A has it in for me James Babcock 14:10:48 10/31/12 (0)
• Re: The old A has it in for me Curt Cooke 13:15:03 10/31/12 (0)
• Re: The old A has it in for me JRSutton 12:51:27 10/31/12 (0)
• Re: The old A has it in for me PretendFarmer 12:21:26 10/31/12 (0)
• Re: The old A has it in for me russ600 12:17:13 10/31/12 (0)
• Re: The old A has it in for me charlie M 11:49:08 10/31/12 (2)
  • Re: The old A has it in for me kopeck 12:03:53 10/31/12 (1)
    • Re: The old A has it in for me Hendrik 13:53:55 10/31/12 (0)
• Re: The old A has it in for me mkirsch 11:45:50 10/31/12 (1)
  • Re: The old A has it in for me kopeck 12:06:23 10/31/12 (0)
• Re: The old A has it in for me rustyfarmall 11:39:24 10/31/12 (1)
  • Re: The old A has it in for me kopeck 11:42:05 10/31/12 (0)
• Re: The old A has it in for me Yooper Farmall 11:19:25 10/31/12 (1)
  • Re: The old A has it in for me kopeck 11:37:13 10/31/12 (0)
• Re: The old A has it in for me pete 23 10:50:50 10/31/12 (1)
  • Re: The old A has it in for me kopeck 11:39:49 10/31/12 (0)
• Re: The old A has it in for me old 10:21:33 10/31/12 (0)

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