Northern Lights — SP17 Raw Water Pump
Maintenance
From a Northern Lights operator's manual covering: M20C, M844LW2, M844W2. Check it applies to your exact model before use.
Applies to: Northern Lights M20C, Northern Lights M844LW2, Northern Lights M844W2, Northern Lights 844W2 / 844LW2 engine, Northern Lights 844W2 engine, Northern Lights 844LW2 engine
Before you start
- Place protection under the screwdrivers so the pump housing is not damaged.
Procedure
- Change the seawater pump impeller every 1000 hours, or as needed.
- Remove the pump end cover; pry out the impeller using needle-nose pliers or two screwdrivers.
- Be sure all pieces of a failed impeller are removed.
- Clean the inside of the housing.
- Press in the new impeller and place sealing washers in the outer end of the impeller center.
- Replace the cover using a new gasket.
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.
Specs & values
- Impeller change every 1000 hours
Full service-parts list: Northern Lights M20C →, Northern Lights M844LW2 →, Northern Lights M844W2 →
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.