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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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Tractors Owned: 1950 Cub, 1952 Cub, 1970 Cub, 1975 Cub, 1953 Cub, 1939 A, 1948 super A, 1952 super A, 1950 C demonstrator, 1952 Super C, 1949 H, 1956 farmall 300, 1957 international 350, 1963 Massey Ferguson 35
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Location: TN Dover

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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Tractors Owned: 1942 Farmall AV, serial #87025
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066
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Location: Lone Jack, MO

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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Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '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, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
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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
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)

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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Joined: Wed Oct 28, 2015 10:39 pm
Zip Code: 98358

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
10+ Years
10+ Years
Posts: 4974
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '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, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
Circle of Safety: Y
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
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)

dchairbag
5+ Years
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Posts: 4
Joined: Wed Oct 28, 2015 10:39 pm
Zip Code: 98358

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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