[Farmall] F-20 questions

[John Hall]

The mag should be firing close to TDC---depends on if you have it retarded 
or not. Going by memory it should fire a few degrees before TDC if it is not 
retarded (in cranking position). I beleive the rotation is CW on the rotor. 
To fine tune the timing there  is a coupler with one bolt thru the side that 
drives the mag. You'll notice lots of holes. Indexing the bolt is how you 
fine tune the mag. Sounds like you are way off right now.
You may want to pick up a service manual to get the exact timing specs. You 
should be able to get one from Rice Equip in PA.

For what it is worth I always chicken out and use a belt to crank one for 
the first time. If you don't have a belt then perhaps tow it.

John Hall


----- Original Message ----- 
From: "joseph buckley" <josephlbuckley at earthlink.net>
To: <farmall at lists.antique-tractor.com>
Sent: Friday, July 28, 2006 10:36 AM
Subject: [Farmall] F-20 questions


> Fellas,
> I am in the last stages of building an F-20 engine from parts. The magneto 
> is bolted on and I noticed that the impulse trips about halfway down the 
> piston stroke. Is this correct? The little round thingamabob that goes 
> between the mag and the engine has slots cut at 90 degrees of each other. 
> Since the timing is stamped on the side of the block, I can figure that 
> out. The Mag has "1" on the upper right terminal. Is the rotation of the 
> rotor clockwise  or counterclockwise (like the input shaft). Thanks for 
> any answers as I have already exceeded my yearly quota for broken bones 
> and don't want to add an arm to it.
> Joe
>
> joseph buckley
> josephlbuckley at earthlink.net
> Why Wait? Move to EarthLink.
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