Impeller Kit | Kohler 229826

Kohler OEM Impeller Kit | 229826 | 12-Blade Seawater Pump | Marine Generator Raw Water Cooling

The Kohler #229826 is the OEM replacement impeller kit for Kohler marine generator seawater pumps. The flexible impeller is the primary wear component in the raw water cooling circuit — it draws raw water through the pump and delivers it to the heat exchanger or cooling passages at a flow rate sufficient to maintain safe operating temperature under load. Impeller vanes fatigue and crack over time, reducing flow, elevating generator operating temperature, and eventually causing overheating shutdowns. The 229826 kit includes a 12-blade flexible impeller, O-ring seal, and assembly lubricant. Also replaces Sherwood 9000/9000K, Sierra 23-2002/23-3303, and Westerbeke 200175/302875.

Part Details:

• Part Number: 229826
• SKU: KOHLER-229826
• Manufacturer: Kohler (OEM)
• Type: Seawater Pump Impeller Kit
• Impeller: 12-blade flexible impeller
• Dimensions: 2-7/16" diameter × 7/8" wide × 5/8" key drive shaft
• Kit Includes: 12-blade impeller, O-ring seal, assembly lubricant
• Replaces Sherwood: 9000, 9000K
• Replaces Sierra: 23-2002, 23-3303
• Replaces Westerbeke: 200175, 302875
• Condition: New, Genuine OEM Kohler
• Country of Origin: USA

Compatible Kohler Marine Generator Models:

• 3.5/5CFZ and 4/6CZ above serial number 296899 with 246489 seawater pump
• 3.5-5EFZ and 4-6.5ESZ
• 8C, 8E, 10C, 10E, 12.5C, 12.5E, 4CCFOZ, 4/6.5EFOZ, 5CCOZ, 5/8EOZ, 8CCFOZ, 9CCOZ, 8/9EFOZ, 9/10EOZ above serial number 296899 with 344089 or 344371 seawater pump
• 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, 28/32EOZ
• Variation 4 and 5: 17/17.5/20EFOZD and 20/23/24EOZD

Additional Information

Impeller Replacement Interval and Inspection:

Kohler specifies impeller replacement at regular service intervals for marine generators — refer to your generator's service manual for the recommended interval for your specific model. Even within the service interval, inspect the impeller any time the generator exhibits elevated operating temperature, reduced raw water flow from the exhaust, or overheating shutdown. Key signs that an impeller needs immediate replacement regardless of hours:

• Broken or missing vanes — a vane that breaks off circulates through the cooling circuit and can lodge in the heat exchanger, thermostat housing, or exhaust elbow; if vanes are missing, inspect the entire downstream cooling circuit for lodged debris before installing the new impeller
• Flat-spotted or permanently deformed vanes — an impeller stored or left sitting in one position compresses the vanes flat; a flat-spotted impeller will not prime or deliver full flow on restart
• Glazed or hardened vane surface — vane material hardens with age and heat exposure, reducing flexibility and flow efficiency even if vanes appear visually intact

Installation Notes:

Always use the assembly lubricant included in the kit — do not install a flexible impeller dry. A dry start even for a few seconds causes immediate vane damage from friction heat. Install with vanes bent in the direction of pump rotation; confirm rotation direction from your pump's service manual before installation. Torque the pump cover to specification and check for raw water flow at the exhaust immediately after startup.

Frequently Asked Questions

1. How do I confirm this impeller kit fits my Kohler marine generator?
Cross-reference your generator model against the compatibility list above, paying attention to the seawater pump number (246489, 344089, or 344371) and serial number threshold (above 296899) where specified. If your model is not listed or you are unsure of your pump number, contact us at MacombMarineParts.com with your generator model and serial number and we'll confirm fitment before you order.

2. What happens if broken impeller vanes are not recovered?
Broken vane fragments will travel through the raw water circuit and lodge in downstream components — most commonly the heat exchanger tubes, thermostat housing, or exhaust elbow water passage. A lodged vane fragment restricts cooling water flow and will cause the same overheating condition that prompted the impeller replacement. Always inspect and flush the downstream cooling circuit when replacing an impeller with missing or broken vanes.

3. Can this impeller kit replace my Sierra 23-2002 or Westerbeke 200175?
Yes — the Kohler 229826 is a verified cross-reference replacement for Sierra 23-2002, Sierra 23-3303, Sherwood 9000, Sherwood 9000K, Westerbeke 200175, and Westerbeke 302875. Confirm that your pump application matches the Kohler generator compatibility list above before ordering on the basis of a Sierra or Westerbeke cross-reference.

4. How often should I replace the impeller on my Kohler marine generator?
Kohler's recommended replacement interval is specified in your generator's service manual and varies by model. As a general guideline for marine generators, annual impeller inspection is recommended regardless of hours, with replacement at each annual service or any time the generator shows signs of reduced cooling water flow. Generators operated infrequently are not exempt — impellers degrade from age and compression set even without running hours.