Northern Lights M673 / OM673 — Injector removal

Repair & overhaul · Injectors

For the Northern Lights M673 / OM673, from the Northern Lights operator's manual.

Applies to: Northern Lights M673, Northern Lights OM673

Procedure

1. Clean dirt around injectors and fuel lines.
2. Relieve pressure by loosening delivery line flare nuts.
3. Remove delivery lines as an assembly; cover openings.
4. Remove return line retaining bolts and return line.
5. Unscrew and remove injectors; do not use pry bars.
6. Discard copper sealing washers; cover holes.

Full service-parts list: Northern Lights M673 →, Northern Lights OM673 →

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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