Seachoice F7 Impeller Kit 17789 | Johnson 09-1028BT-1 / Jabsco 17937-0001
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Seachoice F7 Impeller Kit 17789
Part Number: 17789 (Seachoice) | MPN: A03783 | UPC: 0719249177892
The Seachoice 17789 is an F7 flexible impeller service kit for selected Johnson Pump and Jabsco marine raw-water pumps. It features an 8-blade impeller with a splined hub, measuring 2.56 in. / 65 mm outside diameter and 1.98 in. / 50.2 mm wide. It cross-references directly to Johnson Pump 09-1028BT-1 and Jabsco 17937-0001, making the full pump or original impeller number the most reliable fitment reference.
Impeller Specifications
- Pump family: Johnson Pump / Jabsco F7
- Number of blades: 8
- Outside diameter: 2.56 in. / 65 mm
- Width: 1.98 in. / 50.2 mm
- Drive: Splined hub
Kit Contents
- F7 flexible impeller
- Gasket
- O-ring
- Impeller lubricant
Compatible Applications
This kit belongs to the F7 Johnson / Jabsco flexible-impeller pump family. The equivalent Johnson 09-1028BT-1 is cataloged for marine cooling applications associated with:
- Mercury Marine 4-cylinder engines
- Mercury Marine 6-cylinder engines
- Volvo Penta
- Yanmar
- Kohler marine generator applications
Always confirm fitment by matching the existing pump model and impeller number rather than engine brand alone.
Fitment Notice
Before ordering, verify:
- Existing impeller number
- Pump manufacturer, model, and F7 designation
- Outside diameter: 2.56 in. / 65 mm
- Width: 1.98 in. / 50.2 mm
- 8-spline drive configuration
Do not confuse this F7 kit with smaller F5 or F6 Johnson pump impellers. The Johnson F5 09-1027B-10 measures only 2.25 in. / 57.1 mm OD × 1.24 in. / 31.5 mm wide — a significantly different size. The F7 uses the larger 65 mm / 2.56 in. diameter and 50.2 mm / 1.98 in. width configuration.
OEM & Cross-Reference Part Numbers
- Seachoice: 17789
- Seachoice MPN: A03783
- Johnson Pump: 09-1028BT-1
- Jabsco: 17937-0001
When to Replace the Impeller
- Cooling-water flow is weak or intermittent
- Pump self-priming performance has declined
- Vanes are cracked, torn, stiff, or permanently deformed
- Blade pieces are missing — trace all fragments through the cooling circuit before reassembly
- Pump has been run dry
- Cooling system has experienced overheating
- Annual raw-water pump service is due
Installation Notes
- Shut down and isolate the engine or pump before beginning work
- Remove the pump cover and extract the old impeller
- Inspect the old impeller carefully for missing vane pieces — locate any fragments in the cooling circuit before closing up
- Inspect the pump chamber and cover plate for scoring or wear
- Confirm the replacement dimensions and spline configuration match the original
- Lubricate the new impeller with the supplied or approved water-safe impeller lubricant
- Rotate the pump shaft in its normal operating direction while seating the impeller
- Replace the supplied gasket and O-ring
- Verify strong cooling-water flow immediately after startup
Related Parts
- Johnson Pump 09-1028BT-1 Impeller Kit
- Jabsco 17937-0001-P Profile Y Neoprene Impeller Kit
- Johnson Pump Impeller Puller for 09-1028BT
- Seachoice F35 Impeller Kit 17788 | Johnson 09-808B-1 / Jabsco 22405-0001
- Johnson Pump 09-1027B-10 Impeller Kit (F5)
- Johnson Pump 09-812B-1 Impeller Kit (F6)
- Sierra 18-3306 Johnson Pump F6 / Jabsco Impeller Repair Kit
- Johnson Pump 09812BT1 Kit: F6 Impeller w/ Thread MC97
- Seachoice 17781 Impeller Puller
- Jabsco Neoprene Impeller Kit 920-0001-P
- Jabsco Neoprene Impeller Kit 17370-0001-P
- Yanmar Impeller Kit 119773-42640 — 6LP / 6LPA Seawater Pump Service Kit
Parts Desk Insights
The Seachoice 17789 is a solid value-priced option for annual F7 raw-water pump service across Mercury Marine 4- and 6-cylinder, Volvo Penta, Yanmar, and Kohler applications that use Johnson or Jabsco F7 pumps. Confirming the cross-reference against Johnson 09-1028BT-1 or Jabsco 17937-0001 before ordering takes the guesswork out of fitment.
The most common mistake is confusing F-series impeller designations by appearance alone — the F5, F6, and F7 look similar but have different diameters and widths that affect pump sealing and flow. Always confirm the full impeller or pump number, not just the pump family name. As with any impeller service, if blade fragments are found in the old impeller, trace them through the full cooling circuit before reassembling — a missed piece is a frequent cause of continued overheating after a service.
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.