JD LA

hrrotzjr2 · Jul 6, 2020

I have had a JD LA ,sitting in a shed for around 25 years. It run great before parking it. Well after sitting all these years. I wanted to get it out and use it again in my garden. Rebuilt the carb. and worried to get it running. Finally got it running but, has very little power and burning oil. I can do a little wrenching so I am wondering if I took head of and pulled the pistons out, Run a cylinder hone in it and put a new sit of rings on it, if that would get it running. Can not afford a complete overhaul! I just thought I would try to get it running to cultivate the sweet corn patch.
On that thought I have a 49 JD G that I rebuilt 40 years ago, a JD 620 that i grew up on and a GP that have all been sitting for around the 25 years or more plus a 64 Ford 4000 sos that I parked about 20 years ago with engine troubles. other than the ford , the JD's all run when parked. any suggestions on easy ways to get any of these running without a tear down?

jacksun65 · Jul 6, 2020

Soak them in marvels mystery oil or ATF before you try to start them. Tractors like people if they sit to long go bad. On your LA the rings are probably stuck or broken.
Compression test would help determine weather rings or valves.

hrrotzjr2 · Jul 6, 2020

Thank you, that is encouraging to me, just hope they have not scratched it walls!

Leroy · Jul 6, 2020

LA was running good when parked so how could the rings have broken setting to cause this problem, I would say just stuck and a good engine cleaner might get them loosened up. Valves could also be stuck or rusted so not making perfect contact. If rings are stuck just removing, cleaning and reinstalling them might take care of problem without any more parts than gaskets.

wilson ind · Jul 6, 2020

Easy way to solve any problems with the G would be to sell it to me!!!!!!!! I do think I need a G, thats
think not need, want to buy one. Should you need any major L or LA parts I have several for sale in photo
parts ads.If removing rings I would replace being sure to clean grooves.

Tgrasher · Jul 6, 2020

Check your air flow. Especially before the carburetor and even after. Wasps can make nests by getting in the tiniest hole and make a big blockage. This
would cause low power and oil being sucked up past the pistons.

4wdtom · Jul 6, 2020

After each use you might squirt a little thin oil like ATF into the cylinders and let it set. It will smoke a bit for a while on starting but little by little the oil
and use might free up any stuck rings. I don't see how rings would become broken from sitting unless the engine was stuck and they broke whey trying to free it up, and
you didn't say it was stuck.

DaveBN · Jul 6, 2020

Pour some Sea Foam in the gas tank and crankcase and see if that frees
thing up.

Steve@Advance · Jul 6, 2020

Good chance the LA has stuck rings. Was the engine stuck when you first brought it out?

Chances are if they are stuck, they will not free up at this point. But if you do go in now and do a hone and ring job, you can save it. You might even get lucky and can reuse the rings if the end gaps are in spec.

If you keep running, and they don't free up, more damage will be done and it will require more extensive work.

As for the others, all depends on how much moisture has accumulated in the cylinders. If they have been out side, chances are they will be stuck.

olgentdc · Jul 6, 2020

The above post concerning Sea Foam and ATF fluid coupled with Tgrasher thoughts get my vote of things to try before pulling out the wrenches.

JD LA

hrrotzjr2

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jacksun65

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hrrotzjr2

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Leroy

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wilson ind

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Tgrasher

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4wdtom

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DaveBN

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Steve@Advance

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olgentdc

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