- Joined
- Dec 9, 2021
- Messages
- 738
If it runs smoothly at full rpm at any time, the injector pump, injectors, and delivery lines are OK.
Since it fails to supply full fuel flow after running a while, I would concentrate on the "lift" pump, which pulls fuel from the tank and delivers it to the injector pump. This circuit includes the supply line from the tank, the pump, and the filters.
With the engine idling, crack the bleed plugs on the filters one at a time. Look for air bubbles and a good, steady flow of fuel.
Sometimes, using air pressure to blow back into the tank from the supply line will clear a partial blockage. Older machines can get plugged up, especially if they sit a lot.
Since it fails to supply full fuel flow after running a while, I would concentrate on the "lift" pump, which pulls fuel from the tank and delivers it to the injector pump. This circuit includes the supply line from the tank, the pump, and the filters.
With the engine idling, crack the bleed plugs on the filters one at a time. Look for air bubbles and a good, steady flow of fuel.
Sometimes, using air pressure to blow back into the tank from the supply line will clear a partial blockage. Older machines can get plugged up, especially if they sit a lot.