09-806B Johnson Pump F35B Impeller 9.5mm ID | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F35B 9.5 mm Pin-Drive Cooling-Water Impeller - Replaces SPX Johnson 09-806B / 09-806B-1

Six-blade compact impeller for Johnson F35 pumps with a 9.5 mm slotted pin-drive hub. It must not be confused with the 12 mm-bore 09-808B version.

⚙️ Key Features

• Material: MC97/EPDM-type cooling-water compound
• Outside diameter: 40.0 mm / 1.57 in
• Width: 19.0 mm / 0.75 in
• Hub bore: 9.5 mm / 0.37 in
• Drive: slotted transverse pin
• Blade count: 6

🚤 Compatibility

Commonly used on

• SPX Johnson F35 pumps with the 9.5 mm shaft
• Jabsco pumps specifying 4528-0001
• OEM pumps carrying the listed Onan, Perkins, Sherwood, Volvo Penta or Yanmar numbers

Application Details

• Pump / Service Type: Raw-water engine cooling and clean-water pumping
• Identification: Measure the shaft: this version is 9.5 mm ID, not 12 mm.
• Always compare the removed impeller or pump against the listed dimensions, drive style, material and housing depth before installation.

🔌 Function

The flexible vanes form expanding chambers on the inlet side and contracting chambers on the discharge side. This produces self-priming suction and moves cooling water or other compatible fluids through the pump.

⚠️ Common Signs of Failure

• Reduced flow or inability to prime
• Engine overheating or weak cooling-water discharge
• Pulsing flow, cavitation or unusual pump noise
• Vanes are cracked, hardened, flattened or missing
• Hub has slipped, corroded or loosened from the rubber body
• Impeller has been damaged by dry running, debris or incompatible fluid

🔄 Supersession & Cross Reference

OEM / Manufacturer Number Progression

• 09-806B-1 - current SPX Johnson MC97 designation
• 09-806B - shortened/legacy designation

OEM / Related Numbers

• 09-806B
• 09-806B-1
• 09-808B / 09-808B-1 - 12 mm bore version

Direct Same-Material / Configuration Equivalents

• Jabsco: 4528-0001 / 8293-0001 / 22429-0001
• JMP: 7001-01 / 7001-01K
• CEF: 500100
• Ancor: 2043 / 5043
• Sierra Marine: 18-8952
• Onan: 132-0859
• Perkins: 24880272 / 24990272 - catalogue variants requiring confirmation
• Sherwood: 9979
• Vetus: IMP00501
• Volvo Penta: 803729, 833550, 875807, 875807-0, 876554-7, 3586494
• Yanmar: 104211-42070 / 104211-42071

Dimensional or Different-Material Counterparts

• SPX Johnson 09-808B-1 and Jabsco 22405-0001 use a 12 mm bore and are not shaft-compatible

📦 Condition

• Brand-new aftermarket replacement impeller
• New and unused
• Supplied in suitable manufacturer or equivalent protective packaging