Johnson Pump 09-808B-1 Impeller Kit

The Johnson Pump 09-808B-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 to restore proper water flow and ensure reliable cooling performance.

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

This is a widely used small-frame impeller, commonly found in Volvo Penta saildrives, Westerbeke engines, and compact diesel systems.

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 maximum flow and durability
• Includes gasket and O-ring (kit version dependent)

Engine Compatibility

Volvo Penta Marine Engines

Common applications include:

• 120S saildrive series
• 2001 / 2002 / 2003 series
• MD series (MD1, MD2, MD3, MD5, MD6, MD7, MD11, MD17)

Westerbeke Marine Engines

• BEG / SBEG
• WMD
• BCD / BCDT
• BCGA / SBCG / BCGC / BCGB

Universal Marine Engines

• Various small diesel inboard applications

Other Diesel Engine Applications

Common across compact diesel platforms including:

• Bukh
• Yanmar (select pump setups)
• Kubota-based marine engines
• Lombardini / Farymann / Nanni

Johnson Pump Compatibility (Primary Fitment)

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

• F35
• F35B
• F35B-8007
• F35B-8027
• K34A / K34M
• Threaded and slip port variants

Designed specifically for Johnson F35-series pump systems

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.

Impeller Specifications (Fitment Critical)

• Diameter: 1.571.58″ (40 mm)
• Width: 0.75″ (19 mm)
• Shaft: 12 mm (0.47″) pin-drive
• Blade Count: 6 blades
• Material: MC97 neoprene / EPDM

Whats Included in the Kit

• Impeller
• O-ring
• Gasket (varies by kit version)

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

Installation Notes

• Lubricate impeller before installation
• Install with correct vane direction
• Ensure pin-drive alignment is correct
• Replace all seals and gaskets
• Inspect pump housing for wear

Alternate / Superseded Part Numbers

OEM Cross References

• Johnson Pump: 09-808B-1 / 09-808B

Major Cross References

• Volvo Penta: 875583-7, 833995, 3586496, 21951342
• Westerbeke: 032620, 46622, 46120, 42026
• Vetus: IMP00601

Aftermarket Cross References

• Jabsco: 22405-0001
• Sierra: 18-3076
• Mallory: 9-45709
• CEF: 500121

Shipping

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

Parts Desk Insight

This is one of the most common small Johnson impellers used in Volvo saildrive setups. The key identifier is the 6-blade design + 12mm pin-drive shaftthat combo instantly separates it from spline or keyed impellers