782 kt17 with no compression #1 cylinder
 

I have a new to me Red IH 782 with the kt17 Series 2. It was not running when I got it and won't win any beauty contests but it is very complete and unmolested. With a good cleaning of the points it fired up and runs...However it only runs on cylinder 2.. I have checked things and what I have found is that there is Zero compression in cylinder 1 and about 85psi in #2. I have checked that I don't have a stuck valve and the clearance between the valve and tappet is in spec so it isn't that. I am new to the kt17 twin, so looking for things to check. I am not familiar with the compression release system on the kt17. Could that be the problem before I pull the motor and start tearing into it? Thanks

I doubt the KT17 has compression release. I could be wrong. Best to pull head and have a look-see. Just hope the rod isn't busted. KT17 are known for lubrication issues. Hopefully, your issue is much less than a busted rod.

Stick something like a borescope in the spark plug hole and see if the piston moves or is intact. I would assume it's a rod or piston issue if your valves are set correctly.

There is indeed no compression release on the twin opposed kohlers. If the valve keepers didn’t fall off and the gap is present and close to being in spec then I’m 99% sure you have a connecting rod in pieces. However, all is not lost if the stub of the broken rod didn’t break the block on the opposite side.Last I knew, while pricey, new rods were still available for them. Good luck and keep us updated.

As all have mentioned, they are very well known to snap connecting rods, on the series 1 engines, not so much on series II or the magnums, as series II and magnums have full oil pressure lubrication to the crankshaft connecting rod journals.
Also no compression release as mentioned.

Take the spark plug out of the dead cylinder and look in the hole with a bright small diameter flashlight as it turns over, you should be able to just see the very top of the piston as it moves back/forth in the cylinder.
if it is not moving, you have a broken rod with other internal problems.
When they bust a rod they usually break a hole in the block and most times snap the camshaft.
in other words a catastrophic failiture.
if that is so your best bet is to transplant a bolt in a later Magnum engine.
Also as the magnums are getting older. the availibity is drying up so many ppl are upgrading to the newer OHV engines.:beerchug:
Let us know what you find.:beerchug:

It does happen. I have a 22hp Magnum that runs fine on one cylinder. NO compression on the right cylinder no oil leaks. I put a zip tie in the cylinder to confirm the piston does not move.


Urschel put a used engine in my 2284 to make it useable for me

The 2284 had a Command.

You are right. My bad