Seachoice F35 Impeller Kit 17788 | Johnson 09-808B-1 / Jabsco 22405-0001
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Seachoice F35 Impeller Kit 17788
Part Number: 17788 (Seachoice) | UPC: 0719249177885
The Seachoice 17788 is an F35 flexible impeller service kit for selected Johnson Pump and Jabsco marine raw-water pumps. It uses the F35 MC97 flexible-rubber impeller — a 6-blade configuration designed for reliable self-priming performance and consistent cooling-water flow. It cross-references directly to Johnson Pump 09-808B-1 and Jabsco 22405-0001.
Impeller Specifications
- Pump family: Johnson Pump / Jabsco F35
- Impeller material: MC97 flexible rubber compound
- Number of blades: 6
- Outside diameter: 1.58 in. / 40 mm
- Impeller width: 0.75 in. / 19 mm
- Hub / bore diameter: approx. 0.47 in. / 12 mm
Compatible Applications
Seachoice 17788 belongs to the F35 pump family. Documented applications for the corresponding Johnson 09-808B-1 F35 impeller include:
- Volvo Penta MB and MD-series engines
- Westerbeke 8–10 kW generator applications
- Onan 5.0, 5.5, 6.0, 6.5, 7.5, and 9.0 kW applications
Always confirm by matching the existing pump model and impeller number rather than engine or generator model alone.
Fitment Notice
Before ordering, confirm:
- Existing impeller number
- Water-pump model and F35 designation
- Outside diameter: 1.58 in. / 40 mm
- Width: 0.75 in. / 19 mm
- Hub and drive configuration
Important: Do not confuse this kit with Johnson Pump 09-806B-1, which is also an F35 impeller but is narrower at approximately 0.50 in. / 12.7 mm wide. The 09-808B-1 / Seachoice 17788 is 0.75 in. / 19 mm wide. The width difference matters for correct pump sealing and flow performance.
OEM & Cross-Reference Part Numbers
- Seachoice: 17788
- Seachoice / Johnson reference: 09-808B-1SC
- Johnson Pump: 09-808B-1
- Jabsco: 22405-0001
When to Replace the Impeller
- Cooling-water flow is weak or intermittent
- Pump loses reliable self-priming ability
- Impeller vanes are cracked, torn, stiff, or permanently deformed
- Blade pieces are missing (check entire cooling circuit for fragments)
- Pump has been operated dry
- Cooling system has experienced overheating
- Annual raw-water pump service is due
Annual impeller replacement is recommended to maintain reliable pump operation.
Installation Notes
- Shut down and isolate the engine or pump system before beginning work
- Remove the pump cover and extract the old impeller
- Inspect old impeller for missing vane pieces — locate any fragments in the cooling circuit before reinstalling
- Inspect the pump chamber and cover plate for scoring or wear
- Confirm the replacement impeller matches the original hub, diameter, and width
- Lubricate the impeller with a water-safe impeller lubricant before installation
- Rotate the shaft in its normal operating direction while seating the impeller
- Replace sealing components included with the service kit
- Verify water flow immediately after startup
Related Parts
- Johnson Pump 09-808B-1 Impeller Kit
- Johnson Pump 09-806B-1 Impeller Kit (F35, narrower — 0.50 in. / 12.7 mm wide)
- Jabsco 22405-0001-P Profile D Neoprene Impeller Kit
- Jabsco 6-189480001P Replacement Neoprene Impeller
- Jabsco 6-186730001P Replacement Neoprene Impeller – Profile I
- Jabsco 6-188380001P Replacement Neoprene Impeller
- Sherwood 09959K Impeller Kit
- Sherwood 762-09959K Impeller Kit – Neoprene w/ Gasket & O-Ring
- Sherwood Impeller Kit 10615K
Parts Desk Insights
The Seachoice 17788 is a strong value-priced choice for annual raw-water pump service on Volvo Penta MB/MD-series and Westerbeke or Onan generator-cooling systems that use Johnson or Jabsco F35 pumps. It's a popular pre-season stocking item — straightforward fitment when the OEM number is confirmed.
The most common ordering mistake is confusing the 09-808B-1 (0.75 in. wide) with the 09-806B-1 (0.50 in. wide) — both are called F35, but the width difference causes poor pump performance if the wrong one is installed. Always cross-check the full impeller or pump number, not just the pump family name. If impeller blade fragments are found when removing the old impeller, trace them through the full cooling circuit before closing up — missed pieces are a frequent cause of recurring overheating.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.