Johnson Pump 189-091028BT1 Flexible Impeller | F7-Series Raw Water Pump
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Johnson Pump Flexible Impeller — Part No. 189-091028BT1
- Part Number (SKU): 189-091028BT1
- Manufacturer Part Number (MPN): 09-1028BT-1
- Brand: Johnson Pump
- Type: Flexible marine pump impeller
- Pump Series: Johnson Pump F7
- Blades: 8
- Material: MC97 rubber compound
- Shaft Connection: Internal spline
- Outside Diameter: 2.56 in. (65 mm)
- Width: 1.98 in. (50.2 mm)
- UPC: 7330717011642
- Supersedes / Earlier Reference: 09-1028B
- Cross-Reference: Jabsco 17937-0001
What This Impeller Does
The 09-1028BT-1 is a genuine flexible impeller for Johnson Pump F7-series marine pumps, used in raw-water cooling and general water-pumping applications. The MC97 compound resists swelling, minimizes fatigue failures, and delivers the consistent flow required for reliable engine cooling at all operating speeds.
Compatible Pump Models
Confirm fitment against your pump model number or existing impeller part number before ordering. This impeller is documented for:
- F7B-3
- F7B-3000
- F7B-3020
- F7B-3030
- F7B-30007
- F7B-30207
- F7B-30307
- Selected F7B-5 configurations
Documented Johnson Pump unit numbers that use this impeller:
- 10-22045-1
- 10-22054-1
- 10-24209-1
- 10-24209-3
- 10-24209-5
- 10-24209-7
- 10-24209-9
- 10-24209-11
Compatible Engine Applications
This impeller also appears in parts references for selected Volvo Penta installations. Confirm by pump number — engine family alone is not sufficient for fitment.
- Volvo Penta D4
- Volvo Penta MD40 / TMD40 / TAMD40
- Volvo Penta 30-series
- Volvo Penta 31-series
Fitment Verification
Similar-looking F-series impellers can differ in diameter, width, hub type, and shaft connection. Always confirm all four identifiers before ordering:
- Part number: 09-1028BT-1
- Outside diameter: 65 mm (2.56 in.)
- Width: 50.2 mm (1.98 in.)
- Blades: 8
- Hub: Internal spline
When to Replace
- Blades are cracked, torn, or permanently bent
- Blade tips are missing
- Rubber has hardened
- Water flow has decreased noticeably
- Engine temperature is running above normal
- The pump has been run dry
- Service history is unknown
Johnson Pump recommends proactive replacement on a regular service interval — a failing impeller can reduce cooling-water flow and contribute to overheating or pump damage.
Installation Notes
While the pump is open, inspect the housing bore, cover plate, cam, and shaft seal for wear. If any blades are missing, check downstream cooling passages for fragments before closing the system. Seat the internal spline fully on the pump shaft and use the lubricant specified for your pump model. After installation, confirm normal water flow at the exhaust and check for leaks at the pump cover.
Alternate & Cross-Reference Numbers
- 189-091028BT1 (SKU)
- 09-1028BT-1 (MPN)
- 09-1028B (earlier reference, superseded)
- Jabsco 17937-0001 (cross-reference)
Related Parts
- Johnson Pump 09-1028BT-1 Impeller Kit
- Seachoice F7 Impeller Kit 17789 | Johnson 09-1028BT-1 / Jabsco 17937-0001
- Johnson Pump F4B Impeller Kit 09-1026B-1
- Johnson Pump F5B Impeller Kit 09-1027B-1
- Johnson Pump 09-1027B-10 Impeller | Volvo Penta F5B-9 Raw Water Pump
Parts Desk Insights
Best use case: This is the go-to replacement impeller when you have confirmed an F7-series pump calling for 09-1028BT-1. It is a direct-fit OEM-grade part — no modifications needed.
Common issues: Customers occasionally order by diameter alone and receive an impeller that doesn't fit — the hub type and width also have to match. Always cross-check all five identifiers (part number, OD, width, blade count, hub type) before confirming the order. If a blade is missing on disassembly, inspect the entire cooling circuit for rubber fragments before reassembly.
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.