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Allis B running... but

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Andrew Z

10-06-2004 16:03:48

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I got the old girl running and not to bad at that. It seems to be a little slugish when it goes up hills. Since its a 38' it has no starter. So heres the "but" it will pop start when pulled behind my other tractor in about the first 3 feet. However when I go to hand crank it takes forever to get here started. Any tips to get it starting better? Thanks for the help

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Andrew Z

10-07-2004 18:12:27

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 Re: Allis B running... but in reply to Andrew Z , 10-06-2004 16:03:48  
I just went out and cleaned off the points and adjusted the gap (also the gears were not lined up right). It took about 4 cranks and it fired right up. Also I noticed a huge diffrence in power that is alot more not sure if the mag had any thing to do with the increase.
Thanks to everyone that help me!!

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10-06-2004 18:43:40

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 Re: Allis B running... but in reply to Andrew Z , 10-06-2004 16:03:48  
is the timing too far advanced? if so it will have trouble stating at low crank speed (like hand crank), but would start easier when spun a little faster.

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Andrew Z

10-07-2004 06:31:12

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 Re: Allis B running... but in reply to steve(ill), 10-06-2004 18:43:40  
The compression is really good, ( a very noticable diffrence from my Farmall A) The valves are free and double checked the timing. could the magneto be a little tired? and not producing a hot enough spark? Thanks

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Dick L

10-07-2004 08:52:19

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 Re: A Coupla Things I Have Found in reply to Andrew Z, 10-07-2004 06:31:12  
Over the years on Hand Crank B"s.
First on the magnetos:
As you have stated it starts within three feet when pulled. I do have a question of the meaning of FOREVER in your statment. If this means that some times you can get it started or it just does not start by cranking. Saying it will start some time - If you have the magneto off the tractor and look down past the impluse spring cover/drive hub, you will see two stop dogs that strike a stop pin that loads the impluse spring when cranking. I have had one of these dogs with enough wear or rounded off at the point it strikes the stop pin that it will not catch and load up the impluse spring. It will then not spark half of the time you are cranking this way. If both are rounded of to where they will not load up the impluse it is pull start only.

Second on the Carburator: I have a link to a carburator drawing.
If you look at the bottom drawing, note the discharge tube and the power jet.
Vacuum draws the fuel thru the discharge jet into the firing chamber. With your tractor starting in such short distances, you would have to assume that you have ample vacuum. However you have to have ample fuel at the bottom of the discharge tube. This fuel supply can be restricted both in front of or behind the main jet shown at the bottom right of the drawing.
On cranking some tractors I have found that any choking and it will not start and others you do have to have full choke. With not ever crank started your tractor I would not know with out trying but going back to the(magneto), If you had one rounded off impluse dog and you could never choke your tractor to get it started and you had an ample supply of fuel at the bottom of the discharge tube, cranking without fire would act like a choke.
My humble advise would be to check out the magneto first.

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