New to this forum and diesel maintenance but thought I would make a post to share my recent experiences priming a Yanmar so that others may benefit from my experience and or correct my procedures.
1. Engine had run / idled flawlessly
2. Then went out for a sail with fuel gage 1/8-1/4, bouncing
Ran 2GM20 out of fuel
1. Replaced Fuel/water separator cartridge
2. Replaced on engine fuel filter.
3. Attempted to pull fuel from tank with manual lift pump.
4. Was able to get some fuel
5. Opted to pressurize the fuel tank to push the fuel to the engine.
6. Now had good clean fuel every plunge of manual lift.
7. Next Yanmar service manual stated to crack the fuel return on cylinder 1(pulley side???) and use the manual lift pump until air is bled from cylinder 1, Does this mean just fuel like the bleed screw at the fuel filter? I pumped and pumped then pumped somemore but could never get fuel to come out fuel return. Moved on to bleeding injectors
8. cracked each injector, cranked engine then tightened injector.
9. Engine would pop and run 1-3 seconds then die.
10. Repeated steps 1-9, on several occasions with no success.
11. returned last night and repeated procedure but this time, close the injector while the engine was being cranked.
12. SUCCESS engine is running but billows black smoke, when throttling up.
1. Anyone have experience with priming the yanmar? should you get fuel out of the fuel return line when using the manual lift pump?
2. Is the correct procedure to crack and
retighten the injector nut while cranking.
3. The black smoke, hoping this is just the excess fuel that had been pumped in through my multiple priming attempts. Plan to check prop tonight.