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Message: <blockquote data-quote="Auggie" data-source="post: 135744" data-attributes="member: 20772">Hey there-My 843 from the early 90s started surging badly the other day and feels like it will stall out but I can limp it along. The surging sound is quite cyclical, and there is some black smoke from the exhaust but not too bad. I use it for farm chores, so it's not run heavily, but I bought it from a local landscape guy who was hard on it. he bypassed the original fuel filter with just an in-line filter, and I understand that some of these systems can be sensitive to bad filters, although it's run fine so far for probably the 100 hours I've put on it. I checked through the fuel system up to the injector pump: I checked the pickup tube, it didn't have the screen thing on the end, so I popped one on. I blew out the fuel pump and tested it pumping diesel from a small jar, also confirmed it has 12V at the fuel pump while running. Changed out the in-line filter with a new 'heavy duty' one. And I blew out the hoses as I went. Also took off the air filter and ran it, and the problem persisted.Now I just pulled a fuel injector and the tip looks fouled, so I'm going to just get a new set of injectors (unless someone wants to advise a good way to farm-clean the injectors and pop them back on). My main question is if there could be sediment or issues in the injector pump that might work its way into the new injectors after I replace them. Or could it be something other than the injectors? Also interested if there is a way to salvage my current injectors.Thanks [ATTACH=full]6884[/ATTACH]</blockquote>

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