No spark

[Anson 0]

So I got this B111, it started fine when I got it, but after driving it up the driveway it stalled and now no spark , it turns over great , but no spark, any thoughts?

[953 nut 60,708]

Is your B-111 a manual shift or automatic transmission? Is the PTO lever in the off position? This manual has some wiring information that should be helpful.

 

[The Tuul Crib 7,339]

T😎

[Anson 0]

Yes, it's a manual transmission, and the PTO is in the disengaged position . I really think it's in the switches somewhere, but I check them and they both seam to be working right, What else could it be. 

[gwest_ca-(File Mod) 11,561]

Welcome to the forum.

The easiest to try is a new properly gaped spark plug. If that does not start it remove and save for the next time you need a new plug.

 

There are no safety switches for the ignition on this model. If you can remove the ignition wire from the circuit that would eliminate a possible problem with the ignition switch.

It should run with the ignition wire disconnected.

Your ignition is self powered and the ignition switch simply grounds the ignition wire to shut it off. Do not allow any battery power into the ignition wire. That will burn up the ignition coil.

 

Garry

[Anson 0]

Gary, thanks for the reply, it seems to be blowing fusses also. that main fuss just before the starter,

[gwest_ca-(File Mod) 11,561]

Do you have a way to check the ignition switch function? It is done with the wires disconnected from the switch.

This file shows how to do it. Click on the picture.

These switches all look alike so if required get an identical replacement which is very common.

Since you have a problem with the ignition circuit it is possible the same failure is causing a short inside the switch which blows the fuse.

The fuse has nothing to do with the ignition problem.

Garry

[Anson 0]

Gary, i had the switch checked out at the repair place, and I checked it with a oum guage , so that is working, what else could it be, 

[gwest_ca-(File Mod) 11,561]

After 40 years there may be some insulation worn off a wire leaving the copper exposed. Suspect areas are around the steering column from constant rubbing or any sharp edge. Look for a flat spot worn in the insulation. 

In the center of the flat spot will be a near impossible to see wire exposed.

Does the fuse blow on it's own or does it blow when the switch is turned?

 

Garry

 

[Anson 0]

When the switch is on

[gwest_ca-(File Mod) 11,561]

It will not be the green wire going to the magneto.

That just leaves a blue wire going to the pto switch and the wires going from the pto switch to the clutch pedal switch and pedal switch to solenoid.

 

Try this

Remove the fuse and connect your voltmeter to the 2 wires that the fuse contacts.

Set meter to measure volts.

When you have a reading of 12 volts the short is present.

0 volts the short is gone.

This may help you locate the problem and saves feeding the thing fuses.

You may need to remove the small wire from the small terminal on the solenoid for this to work. (Depending where the short is) Don't let the removed wire touch the chassis.

 

Garry