Recent content by Jtthebrick

The injection pump and injectors are not off and out getting flow tested and cleaned. We'll see how it goes.

I'm still working on the plunger theory. From what I can see online, mine differ from the correct part number.

Just eliminated the glow plug from the equation. No change. Also I just noticed in the injection pump diagram which shows 2 spacers below the pump. Mine has a very thing copper gasket only. Looks like they are available from hoye.

I was just looking at this. I had the fuel line unplugged from it and it would not start. How does this system work?

Ok, now I'm officially confused. I swapped plungers between 2-3 and reinstalled. Cranking with the lines off the pump produces a nice even pattern between all 3 cylinders. Fired it up and all three cylinders over fuel producing tons of black smoke and uncontrollable high rev. My thought is this...

It is rolling black smoke however I now see that only cyl 1 and 3 are over fueling. Going to swap plungers between 3 and 2 and see if the over fueling moves. Also looking for a good source for parts in general. I would have thought yanmar parts would be easy to come by.

Thanks for this. There is a link to a portion of the manual which is coming in handy. Any idea on a source for injectors? They seem to be tough to find.

The plungers could have been swapped. There is a dot on one side which I assumed lined up with the marks on the rack. I may pull it back apart and turn them 180. Yes a bunch of black smoke.

Strange, they seem like simple pumps. I cant wrap my head around why it would over fuel.

Hey Guys, Just purchased a 186d with a runaway situation. I was confident that it would have a stuck rack and that would be that. Unfortunately no dice. Linkage is moving and no matter where rack is positioned, I'm getting full throttle. I've rebuilt the pump for the second time (I've been told...