When I was changing the pre chamber i noticed some erosion on the top of the cylinder 3/16 or a little more this motor might get 20 hours a year on it what do you guys think

Run it till it fails, at 20 hr year it will out live you.....WA7OPY

"now when your tractor runs like crap like this one, that's whats going on in there"

I would change that nozzle.That cut looks like centralized spray from a bad nozzle.

"ya got that right!"

Can you still get reman injectors for it I have a nozzle tester can you buy parts for the inside I am looking for the part number for the copper under the injector hold down

the tip in the parts book is called a cap 2A5746 it doesn't show up on machinery trader search part . The valve shown as 7B8089, don't know if this includes the tip, 302 at Florin tractor in Sacramento CA. Only gasket shown just below a nut 2A5744 Florin has 77 of them. You have a test bench?? just check out the spray pattern. I shoot them at a piece of cardboard to see how they spray. I have a 9K3585 cat 12 that I am parting out if you ever need something. The engine is seized and I have not got into into see if there are any good parts.

Yes I have one of the hand pump testers I just half to see if it has the right adapter I just don't want to make the piston worse

Should have evenly spaced spray pattern. Each pattern should be the same, size and volume.

Here are some pictures of the injector being tested it looks OK to me i think they we done awhile ago but i wouldn't have seen the piston untill the pre chamber broke