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Ignition Switch for B???

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AS

09-29-2000 09:17:42




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I am faced with another electrical question about my B. I have 2 other JD 2 cylinder tractors. Each of them has an ignition switch, You switch it on allowing power from the battery to go to the starter. But on this B that I now have there is no ignition switch, at least that I can find. If the battery is hooked directly to the starter, won't the battery drain its self? Also, how do you turn off a tractor with no switch? Thanks for any help.

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Bayou Dave

09-29-2000 19:41:25




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 Re: Ignition Switch for B??? in reply to AS, 09-29-2000 09:17:42  
On page 20 of the owners manual it says: There are several ways of stoping your tractor, there is only one correct way. By following this, you can be assured of easier starting. To stop the engine, especially if it is burning low-cost fuels, shut off the fuel at the fuel control lever and drain the carburetor bowl. This cuts off the fuel supply to the engine and, after a few revolutions, the engine will stop, leaving the combustion chambers dry - an impotrant contribution to easy starting of the engine. Caution: Do not stop the engine by pulling back on the hand throttle or by shorting the magneto. This leaves several charges of unburnt fuel in the cylinders, which will reliquefy as the engine cools and permit this liquid fuel to lay on the electrode and porcelain of the spark plugs to provide a path for the spark to escape and result in hard starting. Liquid fuel left in the combustion chamber will also wash the lubricating oil off the pistons, rings, and cylinders, thus breaking the oil seal and causing poor compression - also a factor in hard starting.

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John T

09-29-2000 14:26:15




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 Re: Ignition Switch for B??? in reply to AS, 09-29-2000 09:17:42  
If there is no ignition switch, Im thinking it has a magneto (no external power required) instead of a battery/coil ignition. Some magnetos have a kill switch which grounds out the points to kill them, but a true magneto igntiion doesnt have any battery power applied to it. On battery ignitions, its often the starter post (but starter not hot till the switch is depressed) where the voltage is furnished to the ignition, accessories etc., but the coil type ignition would need a switch or else the battery would discharge through the coil and closed points to ground as you suspected. Let us know what you have. Ol John T

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Tim W

09-29-2000 14:21:00




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 Re: Ignition Switch for B??? in reply to AS, 09-29-2000 09:17:42  
I am interested in the answer to that question. Friend has a '49 B, mag , and no switch and no post on the mag to ground it. He just throttles it back til it dies.. Hit the starter, choke it a couple of revolutions and its running .



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Pat

09-30-2000 03:00:18




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 Re: Re: Ignition Switch for B??? in reply to Tim W, 09-29-2000 14:21:00  
Shutting off the fuel is the right way to do it. I grew up with an A and a B, and we never shut them off any other way. Some people throttle back, stand on the brakes, and engage the clutch. Seems like a good way to wear the clutch out, but it would work. I wouldn't recommend it. The only down side (if it is one) is that unless you drain the carburetor it takes a bit of time to die. If you have been working your tractor, though, running it at fast idle with no load is a good way to cool thinks off a bit and let temperatures stabilize. My styled B was a little easier�you could shut the fuel off from the seat. If you timed it right, you could roll to a stop by the pickup just as it started to sputter.

We heard of a neighbor, though, who shut the gas of and pulled the throttle back to slow idle before he left the field. Only thing is, he HADN'T shut the gas off. It idled with low oil pressure until something seized, and needed some new bearings the next day

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