Model A starting problem

Farmall Super A, AV, 100, 130, & 140 1939 - 1973

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dchairbag
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Zip Code: 98358

Model A starting problem

Postby dchairbag » Thu Oct 29, 2015 10:21 am

New owner of an 1942 A and just coming up to speed. Cool tractor. When I try to start it the motor pops once or twice and then stops. Carbs New. Spark looks good on the bench and timings set by the book. Good compression. New manifold gaskets. I'm at a loss. My next step is to replace the mag but not sure that will help. It seems to be ignition related. Any advise is appreciated. Thanks.

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raystractors
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Re: Model A starting problem

Postby raystractors » Thu Oct 29, 2015 12:53 pm

Make sure that you have copper core wires. Also check that the mag it self is in time.

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Stanton
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Re: Model A starting problem

Postby Stanton » Thu Oct 29, 2015 2:01 pm

Welcome to the forum.
Stanton
Image Circle of Safety

dchairbag
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Re: Model A starting problem

Postby dchairbag » Thu Oct 29, 2015 4:39 pm

Thanks, good idea.
I tried to clean up the Mag too. Timed the pinon gear on R assuming that meant right hand rotation of the crank with no help. Also tried it on L just in case.... It doesn't look like the distributor is pointed directly at the #1 post when the mag pop's over but I get ok spark when I pull the plug and crank it over. I'll get some new wires and give them a try.

staninlowerAL
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Re: Model A starting problem

Postby staninlowerAL » Thu Oct 29, 2015 8:35 pm

Farmall A mag timing might be different from from a Cub but the Blue Ribbon Service Manual GSS 1012 for a Cub mag might offer some insight. You can try this link to access it: http://www.farmallcub.com/[ Sorry, direct links to manual section is not allowed. ]/downloa ... -27-55.pdf

Jim Becker
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Re: Model A starting problem

Postby Jim Becker » Thu Oct 29, 2015 9:17 pm


dchairbag
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Re: Model A starting problem

Postby dchairbag » Fri Oct 30, 2015 12:24 am

Thanks. Good bed time reading before I try a new one.

staninlowerAL
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Joined: Fri Oct 29, 2010 11:34 pm
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Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
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Location: AL (Southwest)

Re: Model A starting problem

Postby staninlowerAL » Fri Oct 30, 2015 3:26 am

dchairbag wrote:Thanks. Good bed time reading before I try a new one.

Here's some more, taken from my Original Owners Manual for Super A/AV that I forgot I had. Should get you on the right track. Click on the pictures makes the image larger.
p1 A mag.jpg
p2 A mag.jpg
p3 A mag.jpg

dchairbag
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Re: Model A starting problem

Postby dchairbag » Sun Nov 01, 2015 9:18 pm

Thanks everyone, That did the trick.
I rebuilt the magneto using the manuals you guys provided and she started first try!!!!!! Been driving her around the property all weekend and having a blast. Good oil pressure and running strong, not bad for a 73 year old tractor.

Your help is greatly appreciated.


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