Northern Lights M773L — Bleeding the Fuel System
Maintenance
For the Northern Lights M773L, from the Northern Lights operator's manual.
Applies to: Northern Lights M773L
Before you start
- Escaping diesel fuel under pressure can penetrate skin; relieve pressure before disconnecting lines.
Procedure
- Loosen bleed bolt A on top of the filter.
- Pump hand primer B on the fuel lift pump until pure fuel without bubbles escapes; tighten bleed screw A.
- Loosen bleed screw C, pump hand primer until pure fuel escapes, then tighten.
- If the engine will not start, loosen a fuel line at the injector and crank until pure fuel escapes, then tighten.
- After the engine starts, use a piece of cardboard to look for fuel leaks.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Northern Lights M773L →
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.