Northern Lights 984K / M984 — Replacing the raw water pump impeller
Maintenance
For the Northern Lights 984K / M984, from the Northern Lights operator's manual.
Applies to: Northern Lights M984, Northern Lights 984K engine
Before you start
- Place protection under the screwdrivers so the pump housing is not damaged.
- Keep an extra impeller and cover gasket on board.
Procedure
- Change the impeller every 600 hours, or as needed.
- Remove the pump cover and pry out the impeller with needle-nose pliers or two screwdrivers.
- Be sure to remove all pieces of the failed impeller.
- Clean the inside of the housing.
- Press in the new impeller and place the sealing plug in the outer end of the impeller center if not already done.
Tools required
- needle-nose pliers or two screwdrivers Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Northern Lights M984 →
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.