bypass a fuel shut off solenoid

Allen Burgess · May 14, 2012

I just baught a new zenith carb for my 73 International 464 tractor and my fuel cutoff solenoid does not fit the new carb. I was told to bypass it and not use one. I don't know how to bypass it. Can anyone help me? Please.. Allen

mkirsch · May 14, 2012

Get your money back. They sold you the wrong carburetor and won't tell you what they mean by "bypass it."

I certainly never heard of a way to *bypass* the solenoid.

Allen Burgess · May 14, 2012

I called them and they told me it's the right carb and I just needed to by pass it.

rustyfarmall · May 14, 2012

If the carburetor came with a plug in the hole where the solenoid goes, just put the plug back in and see what happens.

Allen Burgess · May 14, 2012

I did that and the tractor would start but die as soon as I let key go back off the starter possition.

Bob M · May 14, 2012

Allen - If it works like the solenoid on Marvel carbs installed on Oliver and John Deere gassers, all is does is close the main fuel circuit when the ignition is off to prevent a hot engine from "dieseling" at shutdown.

A properly calibrated non-solenoid carb will work fine however. Simply tape the solenoid wire out of the way so it can't accidentally become grounded. (This may be the "bypass" step the dealer is talking about.)

Allen Burgess · May 14, 2012

ok when I tried that the tractor would start but as soon as I let the starter swich go back to the run possistion it will die like I turned it to the off poss.. as long as the starter is engaged it fires but it dies when the starter is not engaged..

Bob M · May 14, 2012

Hey Allen - That's the classic symptom of a failed (open) ignition ballast resistor!

Allen Burgess · May 14, 2012

I will look to see what and where that is and replace that. Thanks Bob

Allen Burgess · May 14, 2012

I am told I can replace the coil and get rid of the ballast....

John G. Hasler · May 14, 2012

> I am told I can replace the coil and get rid of
> the ballast....

You can. It won't start quite as well in cold weather. If that isn't a problem go for it. Always good to eliminate a part when possible.

Bob M · May 14, 2012

(quoted from post at 19:28:36 05/14/12) I am told I can replace the coil and get rid of the ballast....

Yes - so long as you get true 12 volt coil. It will be marked "12 volts" or "NO BALLAST RESISTOR REQUIRED" or similar.

Owen Aaland · May 15, 2012

I don't think replacing the coil will help you any. You will not find a separate ballast resisitor. It should be built into the wiring harness between the key switch and the starter solenoid. The way to check is to look at the wire connections at the coil and the starter solenoid. If the connection at the coil has two wires connected on the side from the key switch and the I terminal on the starter solenoid has only one wire then you will have an external resistor. If the coil has only one wire and the solenoid has two connected at those terminals then the resistor is internal to the wiring harness. Replacing the coil will not make any difference on the tractors with the internal wiring resistor because until you repair the open circuit in the harness you will not have any power to the coil except while the solenoid is engaged.

bypass a fuel shut off solenoid

Allen Burgess

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mkirsch

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Allen Burgess

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rustyfarmall

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Allen Burgess

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Bob M

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Allen Burgess

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Allen Burgess

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