Northern Lights — Injector Installation
Repair & overhaul · injectors
From a Northern Lights operator's manual covering: NL378, NL378x, NL484, NL488x, NL498x. Check it applies to your exact model before use.
Applies to: Northern Lights NL378, Northern Lights NL378x, Northern Lights NL484, Northern Lights NL488x, Northern Lights NL498x
Before you start
- DO NOT use hand to check for leaks.
Procedure
- Place new sleeve in injector hole.
- Slide injector into hole; replace hold-down bracket and nuts.
- Tighten nuts evenly to 5 - 6.5 ft-lbs. (0.7 - 0.9 kgf-m).
- Install fuel lines.
- Install return lines and clamps.
- Install delivery lines; leave 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
- 5 - 6.5 ft-lbs. (0.7 - 0.9 kgf-m)
Full service-parts list: Northern Lights NL378 →, Northern Lights NL378x →, Northern Lights NL484 →, Northern Lights NL488x →, Northern Lights NL498x →
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.