09-824P-2 Johnson Pump F4B-12 Urethane Ballast Pump Impeller | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F4B-12 Polyurethane Ballast Impeller - Replaces SPX Johnson 09-824P-2

Six-blade polyurethane impeller for Johnson F4B-12 Ultra Ballast and compatible water-transfer pumps. The abrasion-resistant urethane compound is intended for clean water and ballast service rather than diesel or oil.

⚙️ Key Features

• Material: polyurethane/urethane
• Outside diameter: 50.8 mm / 2.00 in
• Width: 22.0 mm / 0.87 in
• Hub bore: 8.0 mm single flat
• Blade count: 6
• Commonly identified as the green ballast-pump impeller

🚤 Compatibility

Commonly used on

• SPX Johnson F4B-12 Ultra Ballast pumps
• Jabsco pumps specifying 6303-007-P
• Wakeboard and ski-boat ballast systems using the 8 mm single-flat F4 impeller

Application Details

• Pump / Service Type: Clean-water and ballast transfer; not preferred for hydrocarbons
• Identification: Confirm polyurethane compound, 50.8 × 22 mm dimensions 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

• 09-824P-2 - current polyurethane service designation
• 09-824P-1EZ / 09-824P-1 - related earlier Ultra Ballast designations

OEM / Related Numbers

• 09-824P-2
• 09-824P-1EZ
• 09-824P-1
• 09-824P-9 - nitrile version

Direct Same-Material / Configuration Equivalents

• Jabsco: 6303-007-P
• Aftermarket 6303-007-P polyurethane ballast-pump impeller kits

Dimensional or Different-Material Counterparts

• SPX Johnson 09-824P-9 and Jabsco 6303-0003 - nitrile oil-resistant counterparts
• Jabsco 6303-0001 - neoprene water-service dimensional counterpart

📦 Condition

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