Description

The Johnson Pump 09-806B-1 Impeller Kit is a complete raw water pump service kit designed for Johnson F35 series pumps used in marine engine cooling systems. This kit includes a precision-molded MC97 neoprene impeller along with sealing components and lubricant to restore proper water flow and ensure reliable engine cooling.

Built with a durable marine-grade neoprene compound and a brass hub with a slotted pin-drive shaft, this impeller delivers excellent flexibility, long service life, and consistent performance in both freshwater and saltwater environments.

This is a widely used compact diesel impeller, commonly found in Volvo Penta, Yanmar, Bukh, and small marine diesel engines.

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Key Features

• Genuine Johnson Pump impeller kit
• MC97 marine-grade neoprene / EPDM construction
• 6-blade flexible impeller design
• Brass hub with slotted pin-drive shaft
• Designed for efficient cooling flow and durability
• Includes gasket and O-ring for full service

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Engine Compatibility

Volvo Penta Marine Engines

Common applications include:

• MD1 / MD2 / MD3
• MD6 / MD7
• MD21 / MD22
• 2001 / 2002 / 2003 series
• AQ / AQD series engines

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Yanmar Marine Diesel Engines

• 1GM / 2GM / 3GM series
• YSM / YSB / YSE series
• SB8 / SB12 engines

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Bukh Marine Engines

• DV10
• DV20 / DV20M

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Perkins Marine Engines

• Various small diesel applications
• Cross reference fitment

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Onan Marine Generators

• Generator cooling systems using Johnson pumps

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Other Diesel Applications

• Farymann diesel engines
• Lombardini / Nanni
• Iveco Aifo marine engines

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Johnson Pump Compatibility (Primary Fitment)

Fits Johnson F35 / F35B series raw water pumps, including:

• F35
• F35B
• F35B-8007
• F35B-8027
• Pump assemblies:
  • 10-31934-1
  • 10-32280-1
  • 10-32388-1
  • 10-32415-1
  • 10-35039-1

Designed specifically for Johnson F35-series pump systems

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Serial Number Fitment Notice

Fitment depends on:

• Pump model (F35 required)
• Shaft type (pin-drive / slotted shaft)
• Engine application

Always confirm compatibility using your pump model or engine serial number before ordering.

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Impeller Specifications (Fitment Critical)

• Diameter: 40 mm (1.57″)
• Width: 19 mm (0.75″)
• Shaft: 9.5–12 mm pin-drive
• Blade Count: 6 blades
• Material: MC97 neoprene / EPDM

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What’s Included in the Kit

• Impeller
• Pump cover gasket
• O-ring
• Lubricant (varies by kit version)

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When This Part Needs Replacement

Replace the impeller if you notice:

• Reduced or no cooling water flow
• Engine overheating
• Cracked, missing, or stiff vanes
• Reduced performance under load

Recommended service interval: every 100 hours or annually

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Installation Notes

• Lubricate impeller before installation
• Align pin-drive correctly during install
• Install with correct vane direction
• Replace all seals and gaskets
• Inspect pump housing and wear plate

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Alternate / Superseded Part Numbers

OEM Cross References

• Johnson Pump: 09-806B-1 / 09-806B

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Major Cross References

• Volvo Penta: 3586494, 876689, 803729, 875807
• Yanmar: 104211-42070
• Perkins: 24880272 / 24990272
• Onan: 132-0859
• Vetus: IMP00501

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Aftermarket Cross References

• Jabsco: 4528-0001-P / 4528-0003-P
• Ancor: 2043

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Shipping

Shipping: Ships same or next day for fast Canada wide shipping.

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Parts Desk Insight

The 09-806B-1 is easy to mix up with the 09-808B-1—but this one is smaller (40mm) and uses a pin-drive hub, not a spline. That detail is the quickest way to avoid a wrong order