ARCO IP003 Johnson Pump Replacement Impeller | Replaces 09-45825 / Sierra 18-3089
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ARCO IP003 Johnson Pump Replacement Impeller
Part Number: IP003 (ARCO) | Brand: ARCO Marine | UPC: 693006030159
ARCO IP003 is a premium replacement flexible impeller for compatible Johnson Pump F6 / F6B-9 circulating and raw-water pump applications. It directly cross-references Johnson Pump 09-45825 (F6B-9 service kit impeller) and Sierra 18-3089.
The impeller uses a 12-blade design with a splined hub, measuring approximately 2.25 in. / 57.1 mm outside diameter and 1.90 in. / 48.2–49.2 mm wide. Because Johnson Pump produces multiple impellers that share similar appearances but differ in diameter, width, and hub configuration, always confirm fitment by the existing pump or impeller reference number — not by visual comparison alone.
Specifications
- Manufacturer Part Number: IP003
- Brand: ARCO Marine
- Product Type: Flexible Pump Impeller
- Pump Family: Johnson Pump F6 / F6B-9
- Blades: 12
- Hub Drive: Splined
- Outside Diameter: approx. 2.25 in. / 57.1 mm
- Width: approx. 1.90 in. / 48.2–49.2 mm
- System: Circulating water pump / raw-water cooling pump
- UPC: 693006030159
Compatible Applications
Fitment is determined by the existing pump or impeller number — not by engine brand or displacement alone. Confirmed cross-references:
- Johnson Pump 09-45825 (F6B-9 service kit)
- Johnson Pump impeller family 09-812B-1 (F6-series)
- Sierra 18-3089
- Any circulating-water or raw-water pump application documented to use the above references
Confirm the pump model, impeller reference, hub configuration, and physical dimensions before ordering.
Fitment Notice
Before ordering, confirm all of the following:
- Existing impeller or service-kit number is 09-45825 or 18-3089
- Pump family is Johnson F6 or F6B-9
- 12-blade configuration
- Outside diameter: approx. 2.25 in. / 57.1 mm
- Width: approx. 1.90 in. / 48.2–49.2 mm
- Splined hub drive (not keyed or single-flat)
Johnson Pump manufactures several F-series impellers in similar size ranges that are not interchangeable. Match by part number, not by appearance.
Service Interval
Inspect the impeller at each annual cooling-system service. Replace immediately when any of the following are observed:
- Reduced or absent cooling-water flow
- Engine running hotter than normal
- Pump slow to prime or fails to prime
- Blades cracked, torn, hardened, or permanently bent
- Blade tips missing — inspect all downstream hoses and cooling passages before fitting the replacement
- Pump has operated without water supply
- Scheduled preventive pump service interval reached
Installation Notes
- Shut down the engine and disconnect the battery before beginning service
- Close the raw-water intake seacock where fitted
- Note the pump cover orientation before disassembly for correct reassembly
- Remove the old impeller carefully — do not damage the housing bore or shaft
- Inspect the pump housing bore, cam surface, shaft, and cover plate for scoring or wear — a heavily scored housing may need additional pump service
- Locate and recover all missing blade pieces from downstream passages before installing the new impeller
- Lubricate the replacement impeller with glycerin or dish soap before installation — do not use petroleum-based lubricants
- Align the splined hub with the pump shaft and seat the impeller fully
- Replace the cover gasket or sealing component as required
- Tighten the cover fasteners evenly to specification
- Open the seacock and confirm strong water flow immediately after startup
Cross-Reference Part Numbers
- ARCO: IP003
- Johnson Pump: 09-45825
- Johnson Pump (related F6 family): 09-812B-1
- Sierra: 18-3089
- UPC: 693006030159
Related Products
- Johnson Pump 09-812B-1 Impeller Kit (F6) — F6-series impeller kit, same dimensional family
- Johnson Pump 09812BT1 Kit: F6 Impeller with Thread MC97 — F6 impeller kit variant
- Sierra 18-3306 Johnson Pump F6 / Jabsco Impeller Repair Kit — aftermarket F6 repair kit
- Johnson Pump F5B Impeller Kit 09-1027B-1 — adjacent F5B-series impeller kit
- Seachoice F7 Impeller Kit 17789 | Johnson 09-1028BT-1 — adjacent F7-series impeller kit
Parts Desk Insights
Best use case: ARCO IP003 is the right choice for annual or post-overheating service on Johnson Pump F6 and F6B-9 circulating-water pump applications where the existing impeller references 09-45825 or Sierra 18-3089. It’s a direct drop-in at a reliable aftermarket price point when the pump confirms the correct number family.
Common issues: The most frequent ordering mistake with Johnson Pump impellers is selecting by physical appearance or engine type rather than pump number. The F-series lineup (F4, F5, F6, F7) uses visually similar impellers with meaningfully different diameters, widths, and hub types — none are interchangeable. Always start with the number stamped on the existing impeller or the pump model tag. If blade pieces are missing after removal, trace every downstream fitting and heat exchanger before starting the engine — a loose fragment will destroy the new impeller almost immediately.
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.