09-810B-9 Johnson Pump F4B-19 Nitrile Impeller | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F4B 12 mm Nitrile Pin-Drive Impeller - Replaces SPX Johnson 09-810B-9

Six-blade nitrile impeller for Johnson F4/F4B pumps with a 12 mm pin-drive shaft. It is the oil-resistant counterpart to the 09-810B-1 cooling-water impeller.

⚙️ Key Features

• Material: nitrile, oil resistant
• Outside diameter: 50.8 mm / 2.00 in
• Width: 22.0 mm / 0.87 in
• Hub bore: 12.0 mm / 0.47 in
• Drive: transverse pin
• Blade count: 6

🚤 Compatibility

Commonly used on

• SPX Johnson F4B-8 and F4B-19 pumps using the 12 mm pin-drive shaft
• Oil-transfer versions of Johnson pump 10-24570 and related F4 pump assemblies

Application Details

• Pump / Service Type: Diesel, oil, oily water and compatible fluid transfer
• Identification: Confirm nitrile compound, 12 mm bore and transverse pin drive.
• 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

• 09-810B-9 - current verified nitrile service reference

OEM / Related Numbers

• 09-810B-9
• 09-810B / 09-810B-1 - water-service counterpart

Direct Same-Material / Configuration Equivalents

• CEF: 500201
• Aftermarket J-09-810B-9 nitrile F4B service kits

Dimensional or Different-Material Counterparts

• SPX Johnson 09-810B-1, Jabsco 18653-0001 and CEF 500101 - same dimensions in water-service MC97/neoprene
• No official SPX-listed Jabsco nitrile replacement

📦 Condition

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