Priming fuel pump – Remove and Install


Removal procedure (Manual priming pump)

Isolate the fuel supply.
Make a temporary identification mark on the plastic tube assemblies (1) in order to show the correct position of the tube assemblies.
Place a suitable container below the priming fuel pump in order to catch any fuel that might be spilled. Drain the primary filter (7). Clean up any spillage of fuel immediately.


Disconnect the plastic tube assemblies (1). Plug the tube assemblies with new plugs. Cap the open connectors (2) on the fuel priming pump with new caps. Remove the primary filter (7) from the fuel priming pump (4)
Remove the two setscrews (6) from the fuel priming pump (4). Remove the priming fuel pump (4) from the mounting bracket.
Remove the connectors (2) from the fuel priming pump (4). Remove the plugs (5) from the fuel priming pump (4). Remove the O-ring seals (3) from the connectors (2) and the plugs (5). Discard the O-ring seals.

Removal procedure (Electric priming fuel pump)

Isolate the fuel supply.


Isolate the electrical supply.
Disconnect the electrical lead (3) for the electric priming pump (4).
Make a temporary identification mark on the plastic tube assemblies (1) and (2) in order to show the correct position of the tube assemblies.
Disconnect the plastic tube assemblies (1) and (2). Plug the tube assemblies with new plugs. Cap the ports in the fuel priming pump (4) with new caps.
Remove the four setscrews (5) from the electric priming pump (4).
Remove the electric priming pump (4) from the mounting bracket.

Installation procedure (Manual priming pump)

Ensure that the fuel priming pump (4) is clean and free from wear or damage. If necessary, replace the fuel priming pump.


Install new O-ring seals (3) to the connectors (2) and to the plugs (5). b. Install the connectors (2) to the fuel priming pump (4). c. Install the plugs (5) to the fuel priming pump (4). d. Tighten the plugs and the connectors to a torque of 20 N·m (14 lb ft).
Position the fuel priming pump (4) on the mounting bracket. Install the two setscrews (6) to the fuel priming pump. Tighten the setscrews to a torque of 44 N·m (32 lb ft).
Remove the plugs from the plastic tube assemblies. Remove the caps from the connectors.
Connect the plastic tube assemblies (1) to the connectors (2). Ensure that the plastic tube assemblies are installed in the original positions.
Install a new primary filter (7) to the fuel priming pump (4).
Restore the fuel supply. Prime the fuel system.

Installation procedure (Electric priming fuel pump)

Ensure that the electric priming pump (4) is clean and free from wear or damage. If necessary, replace the electric priming pump.


Position the electric priming pump (4) on the mounting bracket. Install the four setscrews (5) to the electric priming pump (4).
Tighten the setscrews (5) to a torque of 9 N·m (79 lb in).
Remove the plugs from the plastic tube assemblies. Remove the caps from the electric priming pump.
Connect the plastic tube assemblies (1) and (2) to the electric priming pump (4). Ensure that the plastic tube assemblies are installed in the original positions. Connect the electrical lead (3) for the electric priming pump (4).
Restore the electrical supply. Restore the fuel supply. Prime the fuel system.