09-821B Johnson Pump F75B-9 Neoprene Impeller | Genuine OEM Marine Part

🔧 Product Description

Aftermarket F75B-9 Long Spline-Drive Cooling-Water Impeller - Replaces SPX Johnson 09-821B / 09-821BT-1

Long twelve-blade MC97 impeller for Johnson F75B-9 pump assemblies. It is used on large engine-cooling pumps and crosses to Volvo Penta and Yanmar references.

⚙️ Key Features

• Material: MC97/neoprene-type cooling-water compound
• Outside diameter: 65.0 mm / 2.56 in
• Width: 80.0 mm / 3.15 in
• Drive: internal spline
• Blade count: 12

🚤 Compatibility

Commonly used on

• SPX Johnson F75B-9 spline-drive pumps
• Volvo Penta and Yanmar pumps carrying the listed OEM numbers

Application Details

• Pump / Service Type: High-capacity raw-water engine cooling
• Identification: Confirm 65 × 80 mm dimensions and exact spline.
• 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

• 09-821BT-1 - current SPX Johnson MC97 service designation
• 09-821B / 09-821B-1 - legacy/shortened designations

OEM / Related Numbers

• 09-821B
• 09-821B-1
• 09-821BT-1

Direct Same-Material / Configuration Equivalents

• JMP: 7376-01 / 7376-01K
• Ancor: AN4205
• Dayco: DRIM024
• Volvo Penta: 876771, 21422649, 21951358, 22000061, 22994993, 3887761
• Yanmar: 119574-42550, 119574-42552, 119578-42550

Dimensional or Different-Material Counterparts

• No official SPX-listed Jabsco equivalent
• The 50.2 mm-wide 09-1028B and 48.2 mm-wide 09-812B are not substitutes

📦 Condition

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