Kohler — Impeller Inspection and Replacement Procedure
Maintenance · Seawater pump
From a Kohler operator's manual covering: 11EKOD, 11EKOZD, 5EFKOD, 5EFKOZD, 6EKOD, 6EKOZD, 7- 9EFKOZD, 7EFKOZD, 9- 11EKOZD, 9EFKOD, 9EFKOZD, 9EKOZD. Check it applies to your exact model before use.
Applies to: Kohler 11EKOZD, Kohler 5EFKOD, Kohler 6EKOD, Kohler 7EFKOZD, Kohler 9EFKOZD, Kohler 9EKOZD
Procedure
- Close the seacock.
- Remove the seawater pump coverplate.
- Remove the impeller.
- Inspect the impeller for damaged, cracked, broken, missing or flattened vanes; vanes should be straight and flexible.
- Lubricate the impeller with soapy water before installation.
- Install the impeller, pushing and rotating in the same direction as engine rotation until seated.
- Inspect the coverplate and gasket for corrosion and/or damage; replace as necessary.
- Lubricate the gasket with silicon grease and attach the gasket and coverplate.
- Open the seacock.
- Start the generator set and check for leaks.
- Stop the generator set and repair leaks or replace damaged or worn components.
Full service-parts list: Kohler 11EKOZD →, Kohler 5EFKOD →, Kohler 6EKOD →, Kohler 7EFKOZD →, Kohler 9EFKOZD →, Kohler 9EKOZD →
Source: Kohler 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.