Northern Lights M673 / OM673 — Bleeding fuel system
Maintenance
For the Northern Lights M673 / OM673, from the Northern Lights operator's manual.
Applies to: Northern Lights M673, Northern Lights OM673
Before you start
- Fuel under pressure can penetrate skin
Procedure
- Loosen bleed screw A on top of filter.
- Pump hand primer B until pure fuel without bubbles escapes.
- Tighten bleed screw A.
- Loosen bleed screw C; pump until pure fuel escapes.
- If engine does not start, loosen one injector fuel line.
- Crank until fuel escapes; tighten line; repeat each line.
- After start, check for fuel leaks.
Tools required
- cardboard or wood for leak check Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.