[Farmall] F-20 questions

[John Hall]

Going by memory, if you are looking at the mag, the lever on the point cover 
should be on the right and pushed down for running. You raise it to retard 
the timing. Raising it all the way should ground out the spark to cut the 
engine off. This is assuming you have an F-4 magneto.

I know on the F-12/14 the flywheel has timing marks you can see from under 
the tractor. I wouldn't be surprised if the F-20 had the same.

John



----- Original Message ----- 
From: "joseph buckley" <josephlbuckley at earthlink.net>
To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>
Sent: Saturday, July 29, 2006 6:06 PM
Subject: Re: [Farmall] F-20 questions


> Thanks John,
> I thought something was way out in the timing. Where is the lever on the
> mag in cranking position? I will give Rice a call on Monday.
> Joe
>
>
>> [Original Message]
>> From: John Hall <jthall at worldnet.att.net>
>> To: Farmall/IHC mailing list <farmall at lists.antique-tractor.com>
>> Date: 7/29/2006 7:08:44 AM
>> Subject: Re: [Farmall] F-20 questions
>>
>> 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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>> >
>>
>>
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