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Home›Repair guides›Fuel Injector Removal

Craftsman Marine 90A FOUR — Fuel Injector Removal

For the Craftsman Marine 90A FOUR.

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Before you start

  • The fuel injectors must be serviced in a clean room environment.
  • The injector seats in the cylinder head on a copper sealing washer. This washer should be removed with the injector and replaced with a new washer when the injector is reinstalled.

Procedure

  1. Disconnect the high pressure fuel lines from the injectors, then loosen the lines at their attachment to the injection pump and move them out of the way of the injectors. Avoid bending the lines.
  2. Remove the fuel return line in its entirety from the top of the injectors. Take care not to lose the two sealing washers and banjo bolt that attaches the fuel return line to each injector.
  3. Remove the fuel injector holder bracket mounting nuts, then remove the holder brackets.
  4. Remove the fuel injectors. Clean the area around the base of the injector prior to lifting it out of the cylinder head to help prevent any rust or debris from falling down into the injector hole. If the injector will not lift out easily and is held in by carbon build-up or the like, work the injector side-to-side with the aid of the socket wrench to free it, and then lift it out.
  5. Remove the gaskets.
  6. Remove the 0-rings.

Tools required

  • Socket wrench

Source: manual:43502 rev 2.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.