Volvo Penta Raw Water Pump Impeller Kit 21951360 – D4 / D6 / V6 / V8 OEM
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Volvo Penta Raw Water Pump Impeller Kit – Part No. 21951360
Part Number: 21951360
Brand: Volvo Penta
Supersedes: No documented earlier OEM number
Replaced By: Current – 21951360 is the active OEM number
Aftermarket Cross-References: Johnson Pump 09-812B-1, Sierra 18-3057 (verify fitment independently before substituting)
Overview
This is a genuine Volvo Penta OEM raw water pump impeller kit for D4 and D6 diesel engines and compatible V6/V8 gasoline applications. The kit includes a precision-molded flexible rubber impeller along with the pump cover gasket, O-ring/sealing components, and installation lubricant needed for a complete pump service. As an OEM kit, all components are matched to the original pump specifications for hub type, blade profile, and sealing dimensions.
Note: Part number 21951360 is a distinct OEM reference from the related Impeller Kit 21951346, Impeller Kit 21951348, and Impeller Kit 21951352. All fit D4/D6 and related applications but apply to different pump configurations or serial-number ranges. Confirm the correct number against your engine serial number and pump diagram before ordering.
System
Raw-Water / Seawater Cooling System – Impeller Pump. The impeller circulates seawater through the engine cooling circuit. Degraded impeller vanes reduce flow and can cause overheating or shed blade fragments into the cooling system.
Kit Contents
- 1 x flexible rubber raw water pump impeller
- Pump cover gasket
- O-ring / sealing components
- Installation lubricant
Compatible Applications
- Volvo Penta D4 series diesel engines (select models – confirm by serial number)
- Volvo Penta D6 series diesel engines
- Select Volvo Penta V6 gasoline engines with compatible raw water pump configuration
- Select Volvo Penta V8 gasoline engines with compatible raw water pump configuration
- Other compatible Volvo Penta engines – confirm by engine serial number and raw water pump diagram
Serial Number & Fitment Notice
Raw water pump configurations vary across engine families, model years, and production runs. Always confirm part number 21951360 against your engine serial number and the correct Volvo Penta raw water pump diagram before ordering. Hub type and blade count are key identifiers — visually similar impellers in this range are not always interchangeable. 21951360 is not the same kit as 21951346, 21951348, or 21951352.
Service Interval
Replace the raw water pump impeller annually or every 100–200 hours, whichever comes first. In saltwater or high-use applications, annual replacement is strongly recommended regardless of hours. Do not wait for overheating symptoms — a degraded impeller can shed blade fragments that travel downstream and damage heat exchangers or thermostats.
When to Replace
Replace this impeller kit when the existing impeller shows cracked, missing, or hardened vanes, reduced cooling water flow at the exhaust, or any engine overheating. Also replace after extended storage where the impeller may have taken a permanent set. Replace the gasket, O-ring, and apply fresh lubricant at the same time — all are included in this kit.
Installation Notes
Apply the included lubricant to the impeller before insertion — dry installation can damage the blades immediately on first start. Install with the correct vane rotation direction for the pump. Replace all gaskets and O-rings included in the kit. Inspect the pump housing bore for scoring or wear. After reassembly, check the cooling circuit for any broken vane debris before returning the engine to service.
Technical FAQ
Q: What is the difference between 21951346, 21951348, 21951352, and 21951360?
A: All four are OEM Volvo Penta impeller kits for D4/D6 and related gasoline applications, but they apply to different pump configurations or serial-number ranges. The correct kit is determined by your engine serial number and the applicable raw water pump diagram — do not substitute between these numbers without confirming fitment. The 21951360 is the highest-specification kit in this series and is typically required for larger pump assemblies in the D6 and V8 range.
Q: Can I use the Johnson Pump 09-812B-1 or Sierra 18-3057 instead?
A: These are listed as aftermarket cross-references. Aftermarket impellers may differ in material grade or hub tolerance. Verify fitment independently against your pump assembly before substituting an aftermarket kit for the OEM, particularly given the higher specification of this pump assembly.
Q: What happens if a blade breaks off?
A: Broken impeller blades travel through the cooling circuit and can lodge in heat exchangers, thermostats, or other restrictions. If you find a damaged impeller with missing blades, flush the cooling circuit and inspect downstream components before returning the engine to service.
Related Parts
- Volvo Penta Impeller Kit 21951346 – related OEM impeller kit for D4/D6 (different pump configuration)
- Volvo Penta Impeller Kit 21951348 – related OEM impeller kit for D4/D6 (different pump configuration)
- Volvo Penta Impeller Kit 21951352 – related OEM impeller kit for D4/D6/IPS (different pump configuration)
- Johnson Pump 09-812B-1 Impeller Kit (F6) – aftermarket cross-reference impeller kit
- Volvo Penta Seawater Pump Cover Screw Kit 21951334 – pump cover screws for D3/D4/D6/KAD/TAMD
- Volvo Penta Seawater Pump Wear Kit 21951374 – wear components for the seawater pump family
Parts Desk Insights
The 21951360 is the highest-cost kit in the 2195134x/2195136x impeller series, which reflects a larger or more complex pump assembly — most commonly seen on D6 and larger V8 gasoline applications. The most frequent issue is customers ordering one of the lower-cost kits in this series (21951346, 21951348, or 21951352) when the engine actually requires 21951360, because all four share the same engine family and aftermarket cross-references. The only reliable way to confirm which kit applies is to match your engine serial number against the Volvo Penta raw water pump diagram. Pairing this kit with the pump cover screw kit 21951334 is the cleanest way to complete the service in one pass.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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