A pain in the backside aren't they, my family's tractors could be self-bled 40 years ago, why can't Yanmar
manage it now?
I tend to bleed at the secondary fuel filter
, again at the injection pump
, then open the decompression levers, spin it for a few seconds and knock them back down, that gets it to fire/run 9 out of 10, but if that does fail, then crack open all three injectors, open the decompressors again and spin the motor
for 5-10 seconds (close the water
intake cock) until you see fuel leaking at all three injectors, close the injectors and the decompression levers, start as normal and it'll go.