OEM Kohler Seawater Pump Impeller Kit — Engineered for Reliable Thermal Management

Maintain peak cooling system performance on your Kohler marine generator or seawater pump with the Kohler 229826 OEM replacement impeller kit — a precision-engineered wear component designed to sustain optimal raw water flow and prevent thermal overload across dozens of factory-spec generator models. Order today from MacombMarineParts.com and ship from the U.S. warehouse nearest you.

Why Replace Your Impeller on Schedule?

The flexible impeller is a critical wear item within the raw water cooling circuit of Kohler marine generators. Degradation of impeller vanes reduces volumetric flow efficiency, elevates operating temperatures, and accelerates downstream component wear. Adhering to the replacement intervals specified in your owner's manual is the single most effective measure for extending generator service life and preserving rated output performance.

What's Included

• 12-blade flexible impeller — OEM geometry for full flow recovery
• O-ring seal — ensures a leak-free pump housing interface
• Assembly lubricant — facilitates correct impeller installation and reduces initial dry-run wear

Broad OEM Compatibility

The Kohler 229826 utilizes a near-universal impeller profile, making it a direct-fit replacement across a wide range of Kohler generator models and seawater pump configurations. It also serves as a verified cross-reference replacement for select Sierra, Westerbeke, and Sherwood impellers — reducing sourcing complexity for multi-brand fleets. Refer to the compatibility table below or consult your official parts diagram to confirm fitment.

Not sure if this is the right part? Email or text our MacombMarineParts.com technical sales — we specialize in marine generator components and can verify fitment before you order.

Genuine OEM Quality. Ships Fast from MacombMarineParts.com.

Counterfeit and aftermarket impellers frequently fail to meet Kohler's dimensional and durometer specifications, resulting in premature vane fatigue and reduced flow rates. Choosing authentic Kohler OEM components ensures your cooling system meets or exceeds factory performance standards — even under sustained high-load or high-temperature operating conditions.

MacombMarineParts.com stocks this impeller kit at and ships quickly, minimizing transit time so you can complete your maintenance and return to the water without delay.

Additional Information

• Kohler generator impeller kit original equipment
• Includes O-ring and lubricant
• 12-blade impeller with 2-7/16” diameter x 7/8” wide x 5/8” long key drive shaft
• Fits 3.5/5CFZ and 4/6CZ Kohler marine generators above serial number 296899 with 246489 seawater pump.
• Fits 3.5-5EFZ and 4-6.5ESZ Kohler marine generator models.
• Fits 8C, 8E, 10C, 10E, 12.5C, 12.5E, 4CCFOZ, 4/6.5EFOZ, 5CCOZ, 5/8EOZ, 8CCFOZ, 9CCOZ, 8/9EFOZ and 9/10EOZ Kohler marine generators above serial number 296899 with 344089 or 344371 seawater pump.
• Fits 10/13/15EG, 10/13/15EGD, 13/15EGZ, 13/15EGZD, 15/20C, 12.5/16CF, 6EKOD, 5EFKOD, 9EKOZD, 7EFKOZD, 11EKOZD, 9EFKOZD, 6.5/7/8.5/9/11/11.5/13/23/25/27/28EFOZD, 8/9/10/13/14/15/15.5/28/32EOZD, 23/27EFOZ and 28/32EOZ Kohler marine generator models.
• Fits variation 4 and 5 17/17.5/20EFOZD and 20/23/24EOZD Kohler marine generator models.
• Replaces the following part numbers: Sherwood 9000 and 9000K; Sierra 23-2002 and 23-3303; Westerbeke 200175 and 302875