REPLACEMENTKITS.COM Water Pump Impeller Kit compatible with Johnson F6B-9 — neoprene 12-blade, brass insert

Replacement Kits Water Pump Impeller Kit Compatible with Johnson F6B-9 provides a complete neoprene impeller replacement with brass insert, gasket, and O-ring to restore seawater cooling performance.

If your boat’s raw water pump is showing reduced flow, noisy operation, or leaking, replacing the worn impeller and seals is the fastest way to get cooling back to specification. This kit from REPLACEMENTKITS.COM is built to match Johnson F6B-9 style pumps and many equivalent OEM part numbers, giving you a straightforward swap without guesswork.

How does this kit match my Johnson F6B-9 pump?

The kit contains the specific impeller geometry and seal components designed for direct fitment to Johnson F6B-9 and several cross-reference models. You’ll find the same spline, blade count, and sealing interfaces so no machining or modification is required.

• 12-blade impeller with ~2-1/4" diameter and 1-15/16" width
• 5/8" shaft spline brass insert for correct drive engagement
• Includes replacement O-ring and gasket for a leak-free seal
• Cross-references: Johnson 09-812B-1/09-812B, Indmar S685007, Sierra 18-3306, Jabsco 13554-0001-P

What materials are used and why do they matter?

The impeller is molded from premium neoprene rubber selected for flexibility and abrasion resistance in marine cooling systems. A solid brass spline insert reduces wear where the impeller engages the drive shaft, extending service life compared with plain rubber-only designs.

• Neoprene compound resists seawater degradation and retains blade flexibility
• Brass spline insert prevents premature drive wear and maintains alignment
• Precision-cut gasket and O-ring help prevent leaks under pressure
• Durable construction suitable for repeated seasonal maintenance

Which engines and boats will this impeller kit work on?

Although matched to Johnson F6B-9 pumps, this replacement fits a broad range of marine applications that use equivalent pump geometry. It's commonly used on Indmar Monsoon, Hammerhead, and Raptor models as well as many Volvo Penta engines and OEM systems found on wake and ski boats.

• Compatible pump models: Johnson F6B-9, 10-24232-1, 10-24915-01, Jabsco 50410-1201
• Used on Indmar Monsoon/Hammerhead/Raptor series (320–350 HP ranges)
• Fits popular boats: Supra, Moomba, Mastercraft, Tige
• Cross-referenced Volvo Penta part numbers included for broader compatibility

How do I install this kit and what should I check during replacement?

Installation is a routine item for a mechanically inclined owner or tech: drain the pump housing, remove the old impeller, inspect the housing and shaft, then install the new impeller, gasket, and O-ring. Make sure the impeller blades are not twisted and the brass insert seats on the shaft spline to avoid premature failure.

• Remove pump cover and old impeller; clean housing and keyways
• Verify shaft spline condition and seating for the brass insert
• Use provided gasket and O-ring; torque cover to manufacturer specs
• Prime pump and run briefly to confirm flow and no leaks

Who this is for: This replacement impeller kit is intended for boat owners, marine technicians, and service shops that need an accurate, ready-to-install spare for Johnson F6B-9 style pumps and equivalent systems. It's ideal for routine maintenance, winterization service, or addressing low-cooling symptoms on wake, ski, and performance boats using Indmar or Volvo Penta-driven engines. REPLACEMENTKITS.COM supplies an American-owned aftermarket part with clear OEM cross-references so you can replace worn components confidently and return your cooling system to reliable operation.