Water Pump Impeller Kit for Jabsco and Volvo Penta Applications – Replaces 21951346 and 3862281
Water Pump Impeller Kit for Jabsco and Volvo Penta Applications – Replaces 21951346 and 3862281 is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Kit for Jabsco and Volvo Penta Applications – R...
Water Pump Impeller Kit for Jabsco and Volvo Penta Applications – Replaces 21951346 and 3862281 is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller kit includes a flexible neoprene impeller and service components for raw-water cooling pumps used in marine engine applications. It is intended as an aftermarket replacement for compatible Jabsco and Volvo Penta pump assemblies.
Reference numbers associated with this application include Jabsco 1210-0001-P and Volvo Penta 21951346 and 3862281. Always compare the existing impeller, pump assembly, dimensions, drive style, and reference number before ordering.
- Designed for direct replacement in a compatible raw-water pump.
- Neoprene construction for marine raw-water cooling applications.
- Kit includes the impeller, rubber plug, O-rings, and impeller lubricant.
- Suitable for service or preventive replacement when the original impeller is worn, cracked, or missing blades.
Part Number Matrix
The references below are provided for identification and cross-reference purposes. Part-number listings do not replace verification of the complete pump application.
| Brand | Part Number |
|---|---|
| Jabsco | 1210-0001-P, 1210-0001, 1210-0003 |
| Volvo Penta | 21951346, 3862281, 3858256, 877400 |
| Johnson | 09-1027B, 09-1027B-1 |
| Sierra | 18-3081, 18-3277 |
Engine and Model Compatibility
The original application information identifies Volvo Penta GM-based gasoline engines, including 3.0L, 4.3L, 5.0L, 5.7L, and 5.8L applications manufactured up to and including 1998. Confirm the exact engine model, year, pump assembly, and existing impeller reference before installation.
| Brand | Engine Model | Displacement | Stroke | Years | Reference Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | GM 3.0L | 3.0L | 4-Stroke | Up to 1998 | 21951346 | Gasoline engine application |
| Volvo Penta | GM 4.3L | 4.3L | 4-Stroke | Up to 1998 | 21951346 | Gasoline engine application |
| Volvo Penta | GM 5.0L | 5.0L | 4-Stroke | Up to 1998 | 21951346 | Gasoline engine application |
| Volvo Penta | GM 5.7L | 5.7L | 4-Stroke | Up to 1998 | 21951346 | Gasoline engine application |
| Volvo Penta | GM 5.8L | 5.8L | 4-Stroke | Up to 1998 | 21951346 | Gasoline engine application |
Fitment warning: Engine displacement and year alone are not sufficient to confirm fitment. Pump design, serial range, shaft dimensions, drive style, and the original impeller reference must also match.
Technical Specifications
- Product Type
- Raw-water pump impeller kit
- Installation
- Direct replacement for a compatible pump assembly
- Impeller Material
- Neoprene
- Insert Material
- Brass
- Drive Type
- 7-spline drive
- Number of Blades
- 12
- Dimensions
- 57 x 31.5 mm (2-1/4 x 1-1/4 in) [outside diameter x width]
- Shaft Size
- 16 mm (5/8 in)
What's in the Box
- 1 x Neoprene impeller
- 1 x Rubber plug
- 2 x O-rings
- 1 x Impeller lubricant
The kit is supplied as a service set. Included components are intended for the compatible pump application and should be compared with the parts removed during service.
Installation Notes
- Stop the engine, allow it to cool, and close the raw-water intake seacock.
- Place an absorbent towel under the pump to catch residual water.
- Remove the screws from the water-pump cover plate.
- Carefully remove the old impeller with two screwdrivers or an impeller-pulling tool.
- Clean the pump housing and inspect the cover, wear surfaces, and housing for scoring or damage.
- Apply the included lubricant to the inside of the housing and to the new impeller.
- Install the impeller with a rotating motion in the direction required to bend the blades correctly for the pump.
- Install the supplied plug and O-rings where applicable, then replace the cover plate.
- Tighten the cover screws evenly to the pump manufacturer's specified torque.
- Open the seacock, start the engine, and immediately check for leaks and proper cooling-water flow.
Do not run a neoprene impeller dry. A dry start can damage the impeller and pump housing.
Troubleshooting and FAQ
How do I confirm this impeller fits my Volvo Penta engine?
Begin by matching the original impeller or pump reference to the numbers listed in the Part Number Matrix, including Volvo Penta 21951346 and Jabsco 1210-0001-P. Then confirm the pump design, spline count, dimensions, engine model, year, and any applicable serial-range information. Do not rely on engine displacement alone.
What are the signs of a failing water-pump impeller?
Common signs include higher-than-normal engine temperature, reduced cooling-water flow from the exhaust, or a high-temperature alarm. Cracked, hardened, worn, or missing blades indicate that the impeller should be replaced before further operation.
How often should I replace the impeller?
Impeller service intervals depend on the engine manufacturer's maintenance schedule and operating conditions. Inspect the impeller regularly and replace it when damaged, hardened, worn, or after extended storage. Follow the engine and pump manufacturer's service guidance for the recommended interval.
What is the purpose of the lubricant included in the kit?
The lubricant helps ease installation and reduces initial friction before cooling water reaches the impeller. Apply only a thin coat to the impeller and pump housing as appropriate for the pump manufacturer's instructions.
Is a neoprene impeller suitable for my application?
Neoprene impellers are commonly used in raw-water cooling systems. This impeller is intended for compatible marine cooling-water pumps and should not be used for pumping oil, fuel, or other fluids unless specifically approved by the pump manufacturer.
Is this an OEM part?
No. This listing is for an aftermarket replacement kit. The manufacturer names and part numbers shown are used only to identify compatible applications and reference numbers.
What should I do if the old impeller has missing blades?
Remove all broken blade fragments from the pump housing, hoses, heat exchanger, and related cooling passages before installing the replacement. Debris left in the cooling system can restrict water flow and cause overheating.
Safety and Important Information
- Verify the original part number, pump assembly, dimensions, drive style, and engine application before ordering.
- Close the raw-water intake and allow the engine to cool before servicing the pump.
- Never run the pump dry or operate the engine without confirming adequate cooling-water flow.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when the pump, cooling passages, or engine condition is uncertain.
About Sea Sierra
- We supply aftermarket marine replacement parts for maintenance and repair applications.
- Product identification should always be confirmed against the original component and the equipment manufacturer's requirements.
- Contact support with the engine model, pump number, and original part details if application assistance is needed.
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