I do not believe I have changed this oil, in the injector pump. But, I do think I may be onto the issue with my 1700: I checked the fuel filter, even though I just put a new one in about 15 hours ago, the plastic cup around it was cloudy and when I took it off, there was a fair amount of crap at the bottom. Enough dirt to fill a penny if it was empty, if that makes sense. So I cleaned the cup, got a new filter and swapped. Didn't want to start, so I bled the air out of the screws. Still no start, so I bled at the injector inlets to the cylinder - and (as a faced the engine) the fuel line on the left seeped a little fuel out, but, the cylinder/fuel line on the right did not. I tightened the left one and then removed the ~12" fuel line on the right. I blew threw it and, while it took a hefty exhale (which I think makes sense because of the small diameter of that fuel line, I believe it's clear. When I hit the key to try and start/pump fuel, no fuel came up from where I just removed that `12" fuel line - so it must be gummed up between bleed screws and fuel line (see pic - is this the governor??).