A bit of background:
40 year old Yanmar
After the water
inlet was blocked by plastic bag we have honed the cylinder bore very carefully and replaced piston rings and all gaskets.
All relevant parts
were well oiled before starting. Head
was crack tested and skimmed and valves checked all OK. Fuel
is getting to the injector. It sounds like it is getting half the combustion it needs (if that makes sense).
is new as well. Motor
started and ran for a couple of minutes but stopped, we think due to improper valve clearance which has been fixed.
We have good compression
is flowing we believe the injector to be good as it was tested a couple of years ago.
The issue is that it doesn't quite start but is very close.
Symptoms are that there is a distinct pop/blow back when the air inlet valve opens.
Any thoughts or questions for more info would be gratefully received.
The old girl wants to run, I just need to find how to help her.