After leaving the gas dock
after letting the engine
idle slowly (while waiting for a pump out) for about 1/2 hour, the engine
seemed to stall (just as I was traversing the main fairway with traffic coming from both direction!). I shifted to neutral and lowered the throttle and it recovered. I put it in gear
and applied power and it seemed to stall again. I slowed the engine and shifted to neutral again and it stalled. I restarted the engine, shifted to forward and applied power and it took off. I motored into a small bay outside the marina and ran it up to full speed and it seemed to run fine. I ran it for another 1/2 hour just to make sure it was running OK and returned to the dock
The next day, I thought it prudent to change the primary and secondary fuel
filters and look for water
, etc. Filters looked fine but I changed them anyway. I put the system back together and bled the system as described in the Yanmar Service
Manual. I have done this 3 times in the three years I have had the boat because I change the filters every year and have always been successful with this operation. However, this time, I could not get the first cylinder (closest cylinder to the pump) high pressure fuel
line to bleed any fuel. The second or aft most cylinder line bled fine.
Got any ideas? If it is a defective fuel injection pump, can a new pump can be installed or "dropped in" without adjustment or special tools? I keep my boat in Sarnia Ontario
and all I have not heard any successful diesel
engine repair stories and am reluctant to turn my engine over to one of the locals for this reason.
I realize it is difficult to troubleshoot an injection problem with the information I have provided but hope someone has had similar experience and can relate the steps needed to repair the problem.