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Discussion Starter · #1 ·
Stx 38 12.5 kohler command turns over, has spark and fuel wants to start .Wifes friends mower changed oil, spark plug, fuel filter cleaned carb with carb cleaner.Backfires when trying to start,pulled valve cover valves not stuck and moving.
 

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John, although I rarely see this in a riding mower, the flywheel key may be sheared. Those are the symptoms. Best way to tell would be to pull the flywheel. If it's good, nothing lost but a little time.

tommyhawk
 

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Discussion Starter · #3 ·
Pulled head today no burnt valves. Blows seal off oil filter almost starts no fuel in oil. Kohler cv12.5 supposedly has trouble with coil going bad but this is said to happen when warm and wont start.Tom i will check the flywheel key later.
 

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Discussion Starter · #4 ·
Did get it started today then got hot and died checked coil and sparkplug no spark checked kohler site how to test bad coil, $53.00 coil from john deer starts right up,runs fine.Oil filter problem deere said 2 qts only 1 1/2.Thanks for the ideas tom not a bad running mower after all.Oil leak was from not enough rtv to seal valve cover from factory.
 

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Discussion Starter · #7 ·
Still trying to find out where the short is in the safety system.Will crank and run for a few minutes then die has fuel and spark seat switch ok has no continuity when pressed down.
 

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Discussion Starter · #8 ·
Got it running clogged new fuel filter,choke was not coming on when first starting was to lean.Neighbor reminded me about when i set his it did same thing. Fuel was the problem,will try to start when cold friday.
 

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I have started re-assembly of a 1974 110 and cannot remember where these springs belong. One has to be the brake return, but I do not remember which or how it was installed. I took pictures and have a service manual. Of course neither show me what I need. Can someone tell me where they belong? Also, this tractor is one of the later ones with electric lift.

Thanks,
Gene
 

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Gene,

Welcome to WFM. I don't know off hand but you can go to JD parts catalogue and put parts in your shopping cart, then go to your cart, and click on the part number for dimensions and other specs.
 

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Thanks, that helped. I didn't know you could look up specs like that. The larger appears to be the brake return. It's a little longer (1/4 in.) than specs, but has the right number of coils and the diameters are correct.

Gene
 

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I already have the small one connected for the parking brake. The smaller one of these two is about 4 inches long.
Thanks to k.b.'s suggestion and some time looking through photos and parts diagrams I got the larger one attached at the brake arm above the brake drum and down to the hole at the frame bottom. It works great.
The other one, according to specs, appears to be in the neutral safety switch area. Part number s337m. I found it by looking through diagrams for springs.
That one I still can't figure out. I don't remember one being there and can't see how it would attach.

Thanks,
Gene
 

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There is a small spring that hooks around the shifter shaft & connects underneath to keep the shifter tight against neutral switch when your in neutral. It looks similar to your smaller one. If I get a chance I will take a look at my '72 tonight and see if I can check size & mounting points.
John
 

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Gene,
Never did get that picture or look at the spring last night, I apologize. The Mrs. had other plans that took priority.
John
 

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John,
No worries. Thank you very much for the reply and the effort. I understand.

I was looking through the service manual this morning for something and looked at the safety switch section. There in front of me was a photo where you can see a spring hooked to the shift lever. I'll figure out where the other end goes.
That should take care of things for now.
Thanks again to you and k.b.. I'll post a picture later.

Gene
 

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Got the safety switch spring connected. It looks and feels right. I still can't remember taking it off of there. As an old friend of mine says, "My forgetter works better than my rememberer".
Things are coming back together.

Gene


 

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Gene,
Glad to hear you got it figured out.

Don't feel bad about the forgetting. I have a feeling it's all the green paint we are around. It must do something to the brain.

John
 
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