Northern Lights NL498D2 / NL498K2 — Remove and Install Injectors
Repair & overhaul · Fuel injectors
For the Northern Lights NL498D2 / NL498K2, from the Northern Lights operator's manual.
Applies to: Northern Lights NL498D2
Before you start
- Do not use pry bars to remove injectors.
- Do not use hands to check for fuel leaks.
Procedure
- Clean loose dirt from around injectors and fuel lines.
- Relieve high pressure by loosening delivery line flare nuts at each injector.
- Remove delivery lines, return lines, and hold-down brackets; pull injector bodies from holes.
- Discard sleeves from injector holes and cover holes to prevent dirt entry.
- Install new sleeve and injector; replace hold-down bracket and nuts.
- Tighten hold-down nuts evenly to 18-20 ft-lbs (2.5-2.9 kgf-m).
- Install fuel lines; leave delivery lines loose at injectors for bleeding.
- Pump hand lever to fill lines, tighten lines, start engine, and check for leaks with paper or cardboard.
Tools required
- 6 mm wrench or socket Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Injector hold-down nuts: 18 - 20 ft-lbs (2.5 - 2.9 kgf-m)
Full service-parts list: Northern Lights NL498D2 →
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.