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Craftsman Marine — Checking and adjusting injection timing

For these Craftsman Marine models: L2, L3.

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Before you start

  • Be sure to shut off the fuel feed before removing the delivery valve.
  • The standard injection timing differs with engine specification and engine speed.

Procedure

  1. Disconnect the No. 1 injection pipe.
  2. Remove the No. 1 delivery valve from the injection pump. Put back the valve holder only.
  3. Remove the tie-rod cover and disconnect the tie-rod from the control rack.
  4. Set the control rack to a midway position in the working range.
  5. Open the fuel feed pipe and make sure that fuel flows from the delivery valve holder.
  6. Turn the crankshaft in the direction of normal rotation (clockwise) and find an instant that fuel stops flowing from the delivery valve holder.
  7. Adjust thickness of the injection pump mounting shim if timing does not coincide. Increasing or decreasing shim thickness by 0.1 mm causes the real injection timing to vary about 1°.
  8. If installing, disconnect the injection pipes and fuel feed pipe from the injection pump. Then, remove the tie-rod cover and tie-rod, dismount the pump assembly. Reassembly is the reverse of disassembly.

Specs & torque values

  • Injection pump mounting shim (0.1 mm)

Source: manual:Craftsman_16-27_verkstedbok.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.