Northern Lights — Injector Installation (SP-10)
Repair & overhaul · Fuel injectors
From a Northern Lights owner's manual covering: 844DW3, 844LW3, M20CRW3, M844DW3, M844LW3, M844W3. Check it applies to your exact model before use.
Applies to: Northern Lights M20CRW3, Northern Lights M844DW3, Northern Lights M844LW3, Northern Lights M844W3, Northern Lights 844L engine
Before you start
- Overtightening can damage injector.
- DO NOT use hand to check for leaks.
Procedure
- Install a new copper sealing washer in each injector hole.
- Screw in injector and tighten.
- Install return line using new copper sealings above and below each connection.
- Install delivery lines, leaving loose at injectors for bleeding.
- Pump hand lever on fuel pump to fill lines; tighten lines at injectors.
- Start engine and check for leaks using a piece of paper or cardboard.
Tools required
- Torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Injector torque 43 or 50 ft/lbs (6 to 7 kgm)
- Return line retaining bolts 22 - 30 ft/lbs
Full service-parts list: Northern Lights M20CRW3 →, Northern Lights M844DW3 →, Northern Lights M844LW3 →, Northern Lights M844W3 →
Source: Northern Lights owner'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.