09-801B Johnson Pump F5B Key-Drive Impeller | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F5B Key-Drive Cooling-Water Impeller - Replaces SPX Johnson 09-801B

Twelve-blade neoprene impeller for F5B pumps using a 15.9 mm keyed shaft rather than the 09-1027B spline drive. It has a broad Jabsco, Sierra, Volvo Penta, Yanmar and industrial-pump crossover family.

⚙️ Key Features

• Material: neoprene, cooling-water service
• Outside diameter: 57.1 mm / 2.25 in
• Width: 31.5 mm / 1.24 in
• Hub bore: 15.9 mm / 0.63 in
• Drive: keyway
• Blade count: 12

🚤 Compatibility

Commonly used on

• SPX Johnson F5B key-drive pumps
• Jabsco pumps specifying 4568-0001
• Volvo Penta and Yanmar engine pumps carrying the listed keyed-impeller references

Application Details

• Pump / Service Type: Raw-water engine cooling and clean-water transfer
• Identification: Confirm 15.9 mm keyed bore; do not substitute the spline-drive F5B impeller.
• 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

• 09-801B - current/legacy SPX Johnson key-drive reference

OEM / Related Numbers

• 09-801B
• 09-1027B / 09-1027B-1 - same envelope with spline drive, not interchangeable by hub

Direct Same-Material / Configuration Equivalents

• Jabsco: 4568-0001 / 4568-0001-P / 4568-0001-B
• CEF: 500108
• Ancor: 2041
• Sierra Marine: 18-3075 / 18-3075D
• GLM: 89530
• Mallory Marine: 9-45701
• Oberdorfer: 6620 / B6620
• Volvo Penta: 831182, 875573, 875575-3, 21951350
• Yanmar: 124310-46090 / 145410-46090

Dimensional or Different-Material Counterparts

• SPX Johnson 09-1027B and Jabsco 1210-0001 share 57.1 × 31.5 mm dimensions but use an internal spline and are not hub-compatible

📦 Condition

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