connect for fuel shutoff solenoid

I have a rebuilt carb for a Int 706 that has the fuel shutoff solenoid. The carb that was on the tractor did not have the shutoff solenoid, but it should have one so that's what I want to put on the tractor. Where does the wire from the solenoid connect to the tractor? The operators manual shows it connecting to the solenoid on the starter, but it's not clear which of the posts the cable connects to. Thanks for the help. DH

DH - Ideally the fuel solenoid should be fed direct from the "I" (or "IGN") terminal on the ignition switch.

Alternate locations:

If your tractor does not have an ignition ballast resistor the solenoid can be fed from the ignition switch side of the coil primary (do not feed from the coil primary side connected to the distributor!)

Or if the tractor DOES have a ballast resistor connect it to the ignition switch side of the ballast resistor.

Bob M
Thanks for the reply. If I take the ignition switch out, will it show the Ign position?

What happens if it were connected to the solenoid post that is connected to the coil?

How can I make sure I have the right post on the starter solenoid? It will be easier to hook there as apposed to the ign switch which will be hard to get to? Thanks. DH

DH -

If you pull the ignition switch the terminals should be marked. You'll be looking for the one marked I or IGN.

I'm not familiar with the 706 wiring. (My earlier post is based my Oliver 1850 with a fuel solenoid that's wired as I describe.) So I cannot help you with specifics.

You can however easily determine which terminal on the starter solenoid to feed the fuel solenoid using a voltmeter or test light: Simply ground one probe of the meter/light then use the other probe to find which terminal shows 12 volts with the key in "RUN" and 0 volts with the key "OFF"

I don't think you will find a terminal on the starter solonoid that is hot in the run position and dead in the off position. Go to the ign curcuit.

The 706 has a resistor wire between the ignition switch and the I terminal on the solenoid. That wire serves as the ignition resistor. When the solenoid is engaged the I terminal is also connected to battery voltage internally to supply cranking voltage to the coil for a better spark while cranking.

The I terminal at the solenoid should have two wires connected to it. They are probably joined together in the terminal that connects to the solenoid. The S terminal has only one wire going to it. The S terminal needs battery voltage applied to it to engage the solenoid. The I terminal is energized by the solenoid while the starter is engaged to supply 12 volts to the coil while cranking. With the engine running you should have about 6 volts at the I terminal since power is supplied by the ignition switch but it is coming down the high resistance wire which serves as the ignition resistor.

If you were to connect the fuel cut off solenoid to the I terminal at the starter you would not be getting 12 volts once the starter disengaged and most likely the engine would not stay running. The power needs to come from up at the ignition switch and not the starter.