[AT] Magnetoes

[Skip Cleveland]

I have a 1941 "H" With an F-20 front wheel bolster shaft and what looks like 
a fairbanks mag on it. It is hard to tell because it is a 1/12th precision 
scale Franklin Mint tractor.I asked them about it and they said the bolster 
was used til 41 and the mag was correct.

Skip
----- Original Message ----- 
From: "Gene Dotson" <gdotsly at loganrec.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Thursday, December 21, 2006 11:01 PM
Subject: [AT] Magnetoes


>    Most magnetoes were standardized in 1939. Prior to this, many 
> manufacturers had their own magnetoes and mounting system. The industry 
> standardized magnetoes to 3 commom types of mounting and operating system. 
> The common flange mount is available with gear drive and the cross tang 
> drive. The base mount was either shaft or cross tang drive. The magnetoes 
> are virtually interchangable between engines with the same number of 
> cylinders and drive arrangement. The primary difference is in lag angle 
> for starting, which with most tractors is not that much different and can 
> be changed. Rotation can be changed by reversing the direction of the 
> impulse coupling spring and aligning the rotor drive gear.
>    During WW11, Case tractors could have come from the factory with any of 
> 5 different magnetoes. Virtually all of the Case magneto production was 
> devoted to building magnetoes for aircraft engines, so to keep the tractor 
> lines running they bought mags from Faribanks-Morse, Wico, IHC and Bosch. 
> My 1944 Case S has a IHC magneto from the factory.
>
>                        Gene
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