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Northern Lights M673 / OM673 — Changing lube oil filter

Maintenance · Engine

For the Northern Lights M673 / OM673, from the Northern Lights operator's manual.

Applies to: Northern Lights M673, Northern Lights OM673

Before you start

  • Hand tight only; overtightening damages housing

Parts for this job

Part numbers from the service-parts lists for Northern Lights M673, Northern Lights OM673. Verify against your serial number before ordering; some links are affiliate links.

Procedure

  1. Remove old filter with filter wrench; discard.
  2. Remove old gasket; clean mount face.
  3. Apply thin film of engine oil to new gasket.
  4. Screw filter on until gasket meets sealing surface.
  5. Tighten one-half turn by hand; do not overtighten.
  6. Start engine, check leaks, stop, wait 3 minutes, check oil.

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 M673 →, Northern Lights OM673 →

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.

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