312-8 issues

[Wheelhorse616 4]

My wheelhorse has been restored and my starter solenoid that is new only has power to the positive side. It won’t start but when I put a wrench across the two terminals it will start. Not the best with electrical so does the negative side of the starter have to be grounded. Thanks.

[Wheelhorse616 4]

My wheelhorse 312-8 has been restored and my starter solenoid that is new only has power to the positive side. It won’t start but when I put a wrench across the two terminals it will start. Not the best with electrical so does the negative side of the starter have to be grounded. Thanks.

[Handy Don 13,689]

 

1 hour ago, Wheelhorse616 said:

My wheelhorse has been restored and my starter solenoid that is new only has power to the positive side. It won’t start but when I put a wrench across the two terminals it will start. Not the best with electrical so does the negative side of the starter have to be grounded. Thanks.

 

If you can jump the solenoid and start it, then you know two things: 1) the ignition switch "run" position is delivering power the coil to keep it running, and 2) the ignition switch "start" position is not getting power to the solenoid.

 

What year is your 312? Can you post a picture of the solenoid and point out which connections you "wrenched" to start it?

[Handy Don 13,689]

 

1 hour ago, Wheelhorse616 said:

My wheelhorse has been restored and my starter solenoid that is new only has power to the positive side. It won’t start but when I put a wrench across the two terminals it will start. Not the best with electrical so does the negative side of the starter have to be grounded. Thanks.

 

If you can jump the solenoid and start it, then you know two things: 1) the ignition switch "run" position is delivering power the coil to keep it running, and 2) the ignition switch "start" position is not getting power to the solenoid.

 

What year is your 312?

Can you post a picture of the solenoid and point out which connections you "wrenched" to start it?

 

In the search bar, type "tractor 312-8 yyyy" replacing yyyy with your tractor's year. Select "use all my search terms" and "files" in the filters then hit enter.

This will show you documents on file for your tractor.

 

Come back when you have stuff!

Good luck

[953 nut 59,272]

Most replacement solenoids have two small terminals, one goes to the "S" terminal on the ignition switch and the other is a ground.

[gwest_ca-(File Mod) 11,393]

You have a low oil switch that is part of the starter circuit. Check the oil level first and make sure it is full. Then disconnect the switch and see if it starts. The switch is mounted in the oil pan at the rear. If it does the low oil switch needs to be serviced. There are special instructions to remove the low oil switch without damaging it.

 

[roadapples 6,983]

[Wheelhorse616 4]

I figured out that my starter is fine, just have no clue where this wire goes, not good with electrical. If anyone owns 312-8 and knows where this goes, a description and picture would be great. Thanks.

[Wheelhorse616 4]

2 hours ago, gwest_ca said:

You have a low oil switch that is part of the starter circuit. Check the oil level first and make sure it is full. Then disconnect the switch and see if it starts. The switch is mounted in the oil pan at the rear. If it does the low oil switch needs to be serviced. There are special instructions to remove the low oil switch without damaging it.

 

I think I found the culprit, this wire, I am not sure where it goes because I am not good with wiring and can’t figure out the diagram too well. 

[gwest_ca-(File Mod) 11,393]

The looks like a ground wire that would be between chassis parts to ensure a good ground but being a light gauge of wire would not be suitable for anything but a small circuit.

[Wheelhorse616 4]

1 minute ago, gwest_ca said:

The looks like a ground wire that would be between chassis parts to ensure a good ground but being a light gauge of wire would not be suitable for anything but a small circuit.

If anyone finds picture or knows exactly where it goes it would help out a ton, thanks.

[gwest_ca-(File Mod) 11,393]

Do you have a test light? Or a hand-held voltmeter?

[Wheelhorse616 4]

No test light as the ground wire is not connected to anything preventing it from being a full circuit. 

Edited December 27, 2021 by Wheelhorse616

[gwest_ca-(File Mod) 11,393]

I should have said hand-held test light or hand-held voltmeter you can use for testing purpose.

You need to figure out what part is not operating and then why it is not operating. We can help with that.

Then the spare wire may come into play to correct the fault.

[953 nut 59,272]

13 hours ago, Handy Don said:

If you can jump the solenoid and start it, then you know two things: 1) the ignition switch "run" position is delivering power the coil to keep it running, and 2) the ignition switch "start" position is not getting power to the solenoid.

Most 312 models came with the Magnum engine, no points, no powered ignition coil, just a magneto. If the solenoid is not grounded it will not respond to twelve volts being applied to the other small post.

Edited December 27, 2021 by 953 nut

[RED-Z06 2,560]

Thats the hood ground between the hood and block

[Wheelhorse616 4]

4 hours ago, 953 nut said:

Most 312 models came with the Magnum engine, no points, no powered ignition coil, just a magneto. If the solenoid is not grounded it will not respond to twelve volts being applied to the other small post.

You mean the engine being grounded to the frame. I am guessing you mean from the block of the magnum engine right?

[Wheelhorse616 4]

6 hours ago, RED-Z06 said:

Thats the hood ground between the hood and block

What model tractor is that and what engine is on it. Just making sure.

[RED-Z06 2,560]

1 minute ago, Wheelhorse616 said:

What model tractor is that and what engine is on it. Just making sure.

1987 312-8, M12S...

[953 nut 59,272]

8 hours ago, Wheelhorse616 said:

You mean the engine being grounded to the frame. I am guessing you mean from the block of the magnum engine right?

             Look at post #5, I gave you a picture with an explanation.

[RED-Z06 2,560]

15 minutes ago, 953 nut said:

             Look at post #5, I gave you a picture with an explanation.

Its very frustrating.

 

Im confident if it was in front of me id have it cranking in 2 minutes or less...

[Wheelhorse616 4]

34 minutes ago, 953 nut said:

             Look at post #5, I gave you a picture with an explanation.

Sorry just confused because on another post somebody had sad the solenoids are already grounded.

[RED-Z06 2,560]

1 minute ago, Wheelhorse616 said:

Sorry just confused because on another post somebody had sad the solenoids are already grounded.

That was me.  These tractors use a 3 post self grounding solenoid, it grounds to the frame, you apply 12v to the single small post, and it works.

[Wheelhorse616 4]

There’s some pictures, if anyone knows where that wire goes. Feel free to ask for more pictures of any other spot, let me know. Thanks!

[Wheelhorse616 4]

2 minutes ago, RED-Z06 said:

That was me.  These tractors use a 3 post self grounding solenoid, it grounds to the frame, you apply 12v to the single small post, and it works.

Any extra pictures you need that would help you just let me know.