Northern Lights — Injector installation (SP11)
Repair & overhaul · Fuel injector
From a Northern Lights operator's manual covering: M16, M20, M20C, M844, M844L, ML844, ML844L, NL844. Check it applies to your exact model before use.
Applies to: Northern Lights M20C, Northern Lights M844, Northern Lights M844L, Northern Lights ML844, Northern Lights ML844L, Northern Lights NL844, Northern Lights 844 / 844L engine, Northern Lights 844L engine
Before you start
- Do NOT use hand to check for leaks.
- Overtightening can damage injector.
Procedure
- Install a new copper sealing washer in each injector hole.
- Screw in injector and tighten to 44-51 ft/lbs (6 to 7 Kgm).
- Install return line using new sealing washer below each connection. Tighten return line retaining bolts to 22-30 ft/lbs.
- Install delivery lines. Leave loose at injectors for bleeding.
- Crank engine to fill lines. Tighten lines at injectors to 11-18 ft./lbs.
- Start engine and check for leaks using a piece of paper or cardboard.
Specs & values
- Injector torque: 44-51 ft/lbs (6 to 7 Kgm)
- Return line retaining bolts: 22-30 ft/lbs
- Delivery lines at injectors: 11-18 FridayParts $23.50 ft./lbs
Full service-parts list: Northern Lights M20C →, Northern Lights M844 →, Northern Lights M844L →, Northern Lights ML844 →, Northern Lights ML844L →, Northern Lights NL844 →
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.