Northern Lights 984K / M984 — Checking injection pump timing

Testing & diagnosis · fuel injection pump

For the Northern Lights 984K / M984, from the Northern Lights operator's manual.

Applies to: Northern Lights M984, Northern Lights 984K engine

Procedure

1. Bleed air from the fuel system.
2. Remove the fuel injection line from the No. 1 delivery valve on the injection pump.
3. Pressurize the system with the hand primer pump.
4. Slowly rotate the crankshaft clockwise by hand until fuel just begins to rise in the No. 1 delivery valve.
5. The crankshaft pulley notch for 14 degrees BTDC should align with the timing pointer; if not, the pump needs to be timed.

Full service-parts list: Northern Lights M984 →

Source: Northern Lights operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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