09-843S-9 Johnson Pump F3B Nitrile Impeller | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F3B-19 Nitrile Impeller - Replaces SPX Johnson 09-843S-9

Compact six-blade nitrile impeller for Johnson F3B-19 bilge, deck-wash and oil-change pumps. SPX lists no official Jabsco replacement, so the exact 45.2 × 12.8 mm single-flat geometry must be retained.

⚙️ Key Features

• Material: nitrile, oil resistant
• Outside diameter: 45.2 mm / 1.78 in
• Width: 12.8 mm / 0.50 in
• Hub bore: 8.0 mm single flat
• Blade count: 6

🚤 Compatibility

Commonly used on

• SPX Johnson F3B-19 pumps 10-24516-series
• SPX Johnson F3B-19 oil-change pumps 10-24760-series

Application Details

• Pump / Service Type: Oil, diesel, bilge, deck-wash and compatible utility pumping
• Identification: Confirm 45.2 × 12.8 mm size and 8 mm single-flat 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

• 09-843S-9 - current verified SPX Johnson service reference

OEM / Related Numbers

• 09-843S-9
• 09-1052S-9 - same principal dimensions for TA3P10/F3P10 package

Direct Same-Material / Configuration Equivalents

• AMS: J-09-843S-9
• Aftermarket 09-843S-9 / J-09-843S-9 dimensional service kits

Dimensional or Different-Material Counterparts

• SPX Johnson 09-1052S-9 - same 45.2 × 12.8 × 8 mm flat nitrile envelope, supplied for macerator/F3P10 service
• No official SPX-listed Jabsco replacement

📦 Condition

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