Volvo Penta Raw Water Pump Impeller Kit 21951362 – OEM Large Pump Assembly

Volvo Penta Raw Water Pump Impeller Kit – Part No. 21951362

Part Number: 21951362
Brand: Volvo Penta
Supersedes: No documented earlier OEM number
Replaced By: Current – 21951362 is the active OEM number

Overview

This is a genuine Volvo Penta OEM raw water pump impeller kit for use where the Volvo Penta parts diagram calls for part number 21951362. It is the highest-specification kit in the 21951340–21951362 impeller series, designed for larger raw water pump assemblies in the applicable Volvo Penta engine range. 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.

Note: Part number 21951362 is a distinct OEM reference from the related impeller kits in this series: 21951346, 21951348, 21951352, and 21951360. All fit overlapping engine families 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 engines equipped with the compatible large raw water pump assembly where the parts diagram calls for part number 21951362
• Confirm fitment by engine model, serial number, and the applicable Volvo Penta raw water pump diagram before ordering

Serial Number & Fitment Notice

Raw water pump configurations vary across engine families, model years, and production runs. Always confirm part number 21951362 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. 21951362 is not the same kit as 21951346, 21951348, 21951352, or 21951360.

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: How do I know if 21951362 is the right kit for my engine?
A: Look up your engine serial number in the Volvo Penta parts system and match the raw water pump diagram. The 21951362 is the highest-specification kit in this series and applies to larger pump assemblies — if your diagram calls for a different number in the 2195134x–2195136x range, order that kit instead.

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.

Q: Can I reuse the old gasket if it looks intact?
A: Not recommended. Gaskets compress during initial installation and rarely seal correctly when reused. This kit includes a replacement gasket for that reason.

Related Parts

• Volvo Penta Impeller Kit 21951360 – next kit down in the series (D4/D6/V6/V8)
• Volvo Penta Impeller Kit 21951352 – related OEM impeller kit for D4/D6/IPS
• Volvo Penta Impeller Kit 21951348 – related OEM impeller kit for D4/D6
• Volvo Penta Impeller Kit 21951346 – related OEM impeller kit for D4/D6
• 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 21951362 is the top-of-range kit in this impeller series and is typically required for the largest raw water pump assemblies in the Volvo Penta lineup. The most common issue is customers ordering 21951360 when their engine actually requires 21951362, because both are high-spec kits with overlapping engine families and the same 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.