Johnson Pump 09-812B-1 Impeller Kit (F6)
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The Johnson Pump 09-812B-1 Impeller Kit is a complete raw water pump service kit designed for Johnson F6 series pumps used in marine engine cooling systems. This kit includes a high-performance MC97 neoprene impeller along with sealing components to restore proper cooling water flow and protect your engine from overheating.
Built with a durable marine-grade elastomer and a brass spline-drive hub, this impeller delivers excellent flexibility, long service life, and reliable performance in both freshwater and saltwater environments.
This is one of the most common impellers used in Indmar, Volvo Penta, PCM, and Marine Power engines, making it a critical maintenance part for inboard applications.
Key Features
- Genuine Johnson Pump impeller kit
- MC97 marine-grade neoprene construction
- 12-blade flexible impeller design
- Brass hub with spline-drive shaft
- Designed for maximum cooling flow and durability
- Includes gasket(s), O-ring, and hardware (kit dependent)
Engine Compatibility
Indmar Marine Engines
Commonly used on:
- Monsoon 320 / 325 / 330 / 335 / 340 / 350
- Hammerhead 365 / 380 / 383 / 400
- Raptor 6.2L / 400 / 450 / 575
- 5.7L, 6.0L, 6.2L, 8.1L platforms
➡️ Found in MasterCraft, Malibu, Supra, Moomba, Axis boats
Volvo Penta Engines
Compatible with select:
- 4.3L, 5.0L, 5.7L MPI / GI / GXi / OSI
- D3 diesel engines
PCM / Crusader / Marine Power
- PCM inboard engines
- Crusader V8 engines
- Marine Power cooling systems
Other Engine Applications
Also used across:
- Yanmar diesel engines
- Yamaha marine applications
- Toyota marine engines
Pump Compatibility (Primary Fitment)
Fits Johnson Pump F6 series pumps, including:
- F6B-9
- F6B-902
- Johnson pump assemblies:
- 10-13208 series
- 10-24232 / 10-24432 series
- 10-245xx series
➡️ Designed specifically for Johnson F6 crankshaft-driven raw water pumps
Serial Number Fitment Notice
Fitment depends on:
- Pump model (F6 required)
- Shaft type (spline drive)
- Engine configuration
⚠️ Always confirm compatibility using your pump model or engine serial number before ordering.
Impeller Specifications (Fitment Critical)
- Diameter: 2-1/4" (57 mm)
- Width: ~1.9" (48 mm)
- Shaft: Spline drive (~16 mm)
- Blade Count: 12 blades
- Material: MC97 neoprene / elastomer
What’s Included in the Kit
- Impeller
- Pump cover gasket
- O-ring
- Hardware / lubricant (varies by kit version)
When This Part Needs Replacement
Replace the impeller if you notice:
- Reduced cooling water flow
- Engine overheating
- Cracked or missing vanes
- Reduced performance under load
Recommended service interval: every 100 hours or annually
Installation Notes
- Lubricate impeller before installation
- Ensure spline alignment is correct
- Install with proper vane direction
- Replace all gaskets and seals
- Inspect pump housing and wear plate
Alternate / Superseded Part Numbers
OEM Cross References
- Johnson Pump: 09-812B-1 / 09-812B
- Superseded by: 09-812BT-1
Major Cross References
- Indmar: 685007 / S685007
- Volvo Penta: 3584350
- Yanmar: 119773-42600
- Yamaha: 6TA-12457-00
Aftermarket Cross References
- Jabsco: 13554-0001
- Sierra: 18-3306
- Mallory: 9-45704
- PCM: RP061018
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 Parts Desk Insight
This is the go-to impeller for Indmar-powered boats—if you’re working on a wake boat (MasterCraft, Malibu, Supra), this is one of the most common service parts you’ll need 👍
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.