Join Date: Sep 2012
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Re: Torque Spec for Yanmar Injectors?
I found the problem but now the original problem is back.
When I removed the injectors, I tried disconnecting the # 3 injector line from the pump. The flare nut threads onto a sleeve that threads into the body of the pump. When I tried to loosen the flare nut, it wouldn't break free from the sleeve; instead, it backed the sleeve off by about 1/16th of a turn. I had forgotten. I tightened it back up and tightened the clamp that holds the sleeve in place. Based on the diagram, there's a lot of little pieces held in place by that sleeve, so it's sensitive to small movements. I started it up and it idles faster and revs up under load.
However, when I rev it up, there's once again quite a bit of smoke coming out the exhaust. It's definitely un-burnt fuel. So it seems like having the injectors rebuilt didn't cure the problem.