Fuel Injector: Service and Repair

CAUTION
- Each fuel injector is serviced as a complete assembly only.
- Use care in removing the fuel injectors to prevent damage to the electrical connector terminals, the injector filter, and the fuel nozzle. The fuel injector is serviced as a complete assembly only. Also, since the injectors are electrical components, they should not be immersed in any type of liquid solvent or cleaner as damage could occur.

Fuel Injector Removal:

REMOVE/DISCONNECT
- Electrical connectors to fuel injectors. (Squeeze plastic tabs and pull straight up.)
- Fuel meter cover assembly. Fuel Meter Cover Assembly
- With fuel meter cover gasket in place to prevent damage to casting, use a screwdriver and fulcrum to carefully lift out each injector.
- Lower (small) O-rings from nozzle of injectors and discard.
- Fuel meter cover gasket and discard.
- Upper (large) O-rings and steel backup washers from top of fuel injector cavity and discard.

INSPECT
Fuel injector filter for evidence of dirt and contamination. If present, check for presence of dirt in fuel lines and fuel tank. If dirt is present refer to MAINTENANCE PROCEDURES/FUEL SYSTEM CLEANING.

Fuel Injector Part Number Location:

NOTE
Be sure to replace the injector with an identical part. Different injectors with different flow rates will fit this unit, but are calibrated for different flow rates.

Fuel Injector Installation:

INSTALL/CONNECT
- Lubricate new lower (small) O-rings with clean engine oil and push on nozzle end of injector until it presses against injector fuel filter.
- Steel injector back up washer in counterbore of fuel meter body.
- Lubricate new upper (large) O-rings with clean engine oil and install directly over the back up washer. Be sure the O-ring is seated properly and is flush with top of fuel meter body surface.
NOTE Backup washers and O-rings must be installed before injectors or improper seating of large O-rings could cause fuel to leak.
- Injector, aligning raised lug on each injector base with notch in fuel meter body cavity. Push down on injector until it is fully seated in the fuel meter body. (Electrical terminals of the injector should be parallel with throttle shaft).
- Fuel meter cover gasket.
- Fuel meter cover.
- Electrical connectors to fuel injectors.

INSPECT
Turn ignition switch to "ON" position for two seconds, then turn to "OFF" position for ten seconds. Again turn ignition switch to "ON" position and check for leaks around gaskets and fuel line couplings.