09-808B Johnson Pump F35B Impeller 12mm ID | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F35B 12 mm Pin-Drive Cooling-Water Impeller - Replaces SPX Johnson 09-808B / 09-808B-1

Six-blade F35 impeller with a 12 mm slotted pin-drive hub. It shares the outside dimensions of 09-806B but has the larger shaft bore used by a separate pump group.

⚙️ 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: 12.0 mm / 0.47 in
• Drive: slotted transverse pin
• Blade count: 6

🚤 Compatibility

Commonly used on

• SPX Johnson F35 pumps with a 12 mm shaft
• Jabsco pumps specifying 22405-0001
• OEM pumps carrying the listed Onan, Volvo Penta or Westerbeke references

Application Details

• Pump / Service Type: Raw-water engine cooling and clean-water pumping
• Identification: Measure the shaft: this version is 12 mm ID, not 9.5 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

• 09-808B-1 - current SPX Johnson MC97 designation
• 09-808B - shortened/legacy designation

OEM / Related Numbers

• 09-808B
• 09-808B-1
• 09-806B / 09-806B-1 - 9.5 mm bore version

Direct Same-Material / Configuration Equivalents

• Jabsco: 22405-0001 / 22405-0001-P
• JMP: 7000-01 / 7000-01K
• CEF: 500121
• Ancor: 2048 / 50021
• Sierra Marine: 18-3076
• Mallory Marine: 9-45709
• DJ Pump: 08-31-0601
• Onan: 132-0310
• Vetus: IMP00601
• Volvo Penta: 833995, 875583-7, 3586496, 21951342
• Westerbeke / Universal: 032620 / 32620 / 33032

Dimensional or Different-Material Counterparts

• SPX Johnson 09-806B-1 and Jabsco 4528-0001 use a 9.5 mm bore and are not shaft-compatible

📦 Condition

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