Wiring Harness

[G-Nest Member Find all posts View Profile Close G-Nest]

I need a harness for my 123, it has been cranking extremely slow since I got it(came with the car battery mod) My gut tells me it has to do with the compression release as it seems to hang up as it hits the compression stroke. But the wiring is a mess so this needs to be addressed regardless. Where do you guys get yours? There was a name of a member on occ, did he come over yet? Cannot recall his name.

Here’s a pic just because I like seeing it, and you should too 😂


Thanks.

[olds45512 Paint Guru Find all posts View Profile Close olds45512]

His name is Mike and his email is [email protected]

[G-Nest Member Find all posts View Profile Close G-Nest]

Thank you sir

[olds45512 Paint Guru Find all posts View Profile Close olds45512]

Thank you sir

No problem.

[sir_lancealot Administrator Find all posts View Profile Close sir_lancealot]

I have gotten 3 narrow frame harnesses from him and they are all fantastic.

[J-Mech Owner Find all posts View Profile Close J-Mech]

Tanner,
For sure replace the harness.
For sure, get it from Mike.

But if it's hitting compression and trying to stop, then there are a few things I suggest.
1.) Check and adjust the ignition timing.
2.) Check and adjust the valves
3.) Check condition of the S/G.

If you need help on ignition timing, I have an article here that will walk you through it.
While you are adjusting the valves, you can check to see if the compression release is working.
The S/G may just be getting weak too....

[G-Nest Member Find all posts View Profile Close G-Nest]

Thanks Jon, I’ll check those things hopefully this week and report back.

[G-Nest Member Find all posts View Profile Close G-Nest]

Alright I got some garage time in tonight for some open hood surgery.
3879E6DF-2783-4698-861A-F707A3B42766.jpeg
Its been a rough week, we have 4 kids, and 4 of them have fevers Kids are sleeping and wife passed out on the couch so I got to sneak out to the garage with the mistress (brandy). I set the timing statically- thanks Jon for the write up, its very easy to follow. My timing was dead on, no need to adjust. I then jumped the starter directly to eliminate any wiring/ground issue, no change in the cranking speed. I decided to drag the 125 into the garage and swap over S/G to see if there is any improvement.

attempting to imbed videos... bear with me.

This is the existing situation

Here is the s/g swapped over from the 125

Obviously a huge improvement!!

Are these s/g easy enough to rebuild or am I better off just finding a used one?
AEE5850E-CA88-4679-A431-65957484808F.jpeg479957B6-9CBB-4946-91D4-D66FF48C8A35.jpeg

[olds45512 Paint Guru Find all posts View Profile Close olds45512]

I'd say the issue is the s/g for sure. Seem's to roll over nice in the second video.

[Greenstripewideframe Charter Member Find all posts View Profile Close Greenstripewideframe]

I would take it to an electrical motor repair shop. They have the right tools for checking out the whole thing. Usally pretty inexpensive. Plus you get a warranty

[J-Mech Owner Find all posts View Profile Close J-Mech]

I agree with Cory, Tanner. See if you have a shop near you that rebuilds starters and alternators. There are 2 or 3 within 45 miles of me. Can one do it themselves..... not effectively. You can clean up the commutator with emry and put new brushes in.... change bearings. But the armature needs run on a growler to look for shorts, and the field coils tested. Commutator needs turned on a lathe and the formica cut out from between them. Even I send mine in to get rebuilt. If you don't have anywhere local, let me know. I can get you the name of the shop I use.

[jaynjeep Charter Member Find all posts View Profile Close jaynjeep]

My starter generator guy closed his shop and retired last week @ 82 years old.. he couldn't find anybody that wanted to learn the business.. throw away and parts store rebuilds had made it hard on him for the last 15 years.. He had done cub SG's for me my whole life.. guess I gotta find somebody else!

[J-Mech Owner Find all posts View Profile Close J-Mech]

That's frustrating Jay!!

I had two local retired welder/machinists that worked from a home shop that I used to have do tons of stuff for me. They were VERY good. Both died with a couple years of each other. It was kind of sad really.

[Diesel Doc Charter Member Find all posts View Profile Close Diesel Doc]

Unfortunately that is happening all over, the old shops are closing and no one does the work anymore. I still have one good source nearby, but he is not the best in delivering a repair on time. Quality work but it takes him a couple of weeks to get it done. I need to find a growler and do the rebuilding myself. I have the lathe and the cutback tooling for the commutator.

[J-Mech Owner Find all posts View Profile Close J-Mech]

Doc, I too have been considering getting a growler. Looked at them on ebay several times. Stupid me, passed up a Commutator lathe with the cutback tool at a flea market a year ago. Like $40 or something. Didn't buy it because, at the time, it would have just got put on a shelf for use "someday". For the price, I wish I had....