OK, I have just read your OB thread so I'm guessing you don't have much previous history
of this engine and that changes things about the best way to help you.
Back to basics, a 2QM20
will run if it has enough fuel, unrestricted air, compression
and correct timing. The fact that it starts with the starter motor
indicates most things are OK, especially timing and compression
Lets assume the air inlet is OK ( usually is
), that leaves fuel. Again because it starts, we can assume no air in the fuel system (I think).
Thats leaves only not enough fuel.
Just a guess here, if the mechanical lift
pump has failed in the past and an electric
one has been fitted instead on repairing the old one, maybe there is a problem there. Can be checked by rigging
a can of diesel
and gravity feeding it to the injector pump
Another possibility is a very worn injector pump
although I would not expect it to start at all in this case.
As Mattyb suggested, blocked fiters...
Have you tried starting with the throttle closed (idle position).
Can you confirm gear
linkage is in neutral when starting.
It is always hard to sort these problems out without history
and with a suspect old installation
when you have only recently acquired the boat but stick with it, this is a simple engine and you have the collective might of many CF engineers behind you. I must say however, I'm not one of them
. Hopefully they with tune in soon.