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Trying to figure out the proper way to get this done. Got a 803 that had the shims messed with, when I got it it never ran like the other 803 I have. I looked up the workshop manual from lister petter, found the page where it talks about fuel pump timing. Even found a video on you tube that...

2010 803, around 250 hrs. I was replacing the fuel return lines because they were leaking. After replacing, had some diesel left over on the head by the injectors. When running it, noticed small bubbles forming around the injector. Reached out to a few guys on here, followed their advice. 1...

Hey everyone took the advice from the other threads and took off the muffler. Got it running and loaded it up to 105% and I can clearly see 2 cylinders puffing smoke. The other two seem to be running okay. Had it running for like 10 minutes and can see the carbon build up on the valve covers...

Hey everyone, on the yanmar engines used in the 531/831, is there supposed to be a injector seal, kind of like a copper washer or something along those lines ? I took an injector out today and there was no seal in it but the parts breakdown had two types listed. Parts 17 and 18 in the diagram...

Hey guys pump number 2 won’t produce any fuel while cranking with the line off. Looking through the engine tm, on 3-23, it says to shim the pump. Never done this before, anybody have any experience with this procedure ? Thanks for any help in advance

Hey guys, got a 831-a, and having a problem with the a/c contractor (k1). My problem is basically the switch on the front (S5) won’t engage the relay (k1). I know k1 is good, I pulled it out and energized it with 24 and the relay clicks and has continuity. I pulled out S5 too, tested ok. If I...