Sherwood 10077K Impeller Kit
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The Sherwood 10077K Impeller Kit is a complete raw water pump service kit designed for Sherwood pump systems used in marine engines and generators. This kit includes a precision-molded neoprene impeller along with gaskets and an O-ring to restore proper cooling system performance and ensure reliable water circulation.
Constructed with a marine-grade neoprene impeller and a brass hub with a keyed drive, this kit provides durability and consistent performance in both freshwater and saltwater environments. Replacing a worn impeller helps maintain proper engine temperature and prevents overheating or internal damage.
This is a very common small-frame Sherwood impeller, widely used in gas inboards, classic marine engines, and Onan marine generators.
Key Features
- Genuine Sherwood impeller service kit
- Marine-grade neoprene rubber construction
- 12-blade flexible impeller design
- Brass hub with keyed drive (3/32" keyway)
- Includes gasket(s) and O-ring
- OEM-spec fit and performance
Engine Compatibility
Onan Marine Generators
Common applications include:
- MDKAA
- MDKAB
- MDKAL
- MDKAV
- MDKAW
- MDKAZ
- MDKBG
- MDKBK
- MDKBL
- MDKBM
- MDKBN
- MDKDK / MDKDL / MDKDM / MDKDN
➡️ Typically 6.5–10kW marine generator systems
Chris-Craft Marine Engines
- Model 283
- Model 430
- Model B
Gray Marine Engines
- Government / industrial marine engines
Westerbeke Marine Engines
- Various 4 & 6 cylinder diesel engines
- Pilot and generator applications
Universal / Palmer / Medalist Engines
- Universal marine engines
- Palmer I.H. series
- Medalist OK / OL engines
Sherwood Pump Compatibility (Primary Fitment)
Fits a wide range of Sherwood pumps, including:
- R30G / R30G-1-01
- G701 / G701-01
- G702 / G702-01
- H70 / H80
- M10095G
- M10261G
- N10360GX
- Q10805G
- Q10840
- E05 / E20
- A03 / A20
➡️ Some pump systems use two 10077K impellers (dual impeller setups)
Serial Number Fitment Notice
Fitment depends on:
- Pump model
- Shaft size (1/2" keyed shaft required)
- Engine or generator application
⚠️ Always confirm compatibility using your pump model or engine serial number before ordering.
Impeller Specifications (Fitment Critical)
- Diameter: 2-1/4" (57 mm)
- Width: 25/32" (≈20 mm)
- Shaft: 1/2" (12.7 mm) keyed
- Keyway: 3/32"
- Blade Count: 12 blades
- Material: Marine-grade neoprene
What’s Included in the Kit
- Impeller
- Gaskets (typically 2–3 depending on version)
- O-ring
When This Part Needs Replacement
Replace the impeller if you notice:
- Reduced or no cooling water flow
- Engine or generator overheating
- Cracked, missing, or stiff vanes
- Reduced performance under load
Recommended service interval: every 100 hours or annually
Installation Notes
- Lubricate impeller before installation
- Install with correct vane direction
- Ensure key is properly seated
- Replace all included gaskets and O-rings
- Inspect pump housing for wear
Alternate / Superseded Part Numbers
OEM Cross References
- Sherwood: 10077K / 10077K-SHW
Major Cross References
- Onan: 132-0375, 132-0379, 132-0498, 541-1519
- Westerbeke: 11764, 33100, 33112
- Universal: 287439
- Crusader: 727103
- Chris Craft: 16.80-90047
Aftermarket Cross References
- Sierra: 23-3310 / 23-3302 / 23-2000
- JMP: 7110 / 7110-01K
- CEF: 500166
- Mallory: 9-45716
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 Parts Desk Insight
The 10077K is one of the most common small-frame Sherwood impellers, especially on generators. The key identifier is the 1/2" keyed shaft + 2-1/4" diameter—that combo makes it easy to separate from 10615K 👍
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.