09-1027B-9 Johnson Pump F5B Nitrile Spline-Drive Impeller | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F5B Nitrile Spline-Drive Impeller - Replaces SPX Johnson 09-1027B-9

Twelve-blade oil-resistant nitrile impeller for Johnson F5B spline-drive pumps. It is dimensionally related to the 09-1027B-1 cooling-water impeller but must be selected when the transferred fluid requires nitrile.

⚙️ Key Features

• Material: nitrile, oil resistant
• Outside diameter: 57.1 mm / 2.25 in
• Width: 31.5 mm / 1.24 in
• Drive: internal spline
• Blade count: 12

🚤 Compatibility

Commonly used on

• SPX Johnson F5B nitrile spline-drive pumps
• Jabsco pumps specifying 1210-0003
• Oil and diesel transfer pumps using the F5B spline hub

Application Details

• Pump / Service Type: Diesel, lubricating oil, oily water and compatible fluid transfer
• Identification: Confirm nitrile material, 57.1 × 31.5 mm dimensions and spline 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

• 09-1027B-9 - current verified nitrile service reference

OEM / Related Numbers

• 09-1027B-9
• 09-1027B / 09-1027B-1 / 09-1027BT-1 - water-service counterparts

Direct Same-Material / Configuration Equivalents

• Jabsco: 1210-0003
• JMP: 7100-02
• CEF: 500207
• Ancor: J050407

Dimensional or Different-Material Counterparts

• Jabsco 1210-0001, JMP 7100-01/7100-01K, CEF 500107, Sierra 18-3081 and the broad OEM 09-1027B crossover family - same envelope but water-service compound

📦 Condition

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