Water Pump Impeller – Fits Honda Marine 8-20 HP (Replaces 19210-ZW9-013, 18-3100, CEF500347)
Water Pump Impeller – Fits Honda Marine 8-20 HP (Replaces 19210-ZW9-013, 18-3100, CEF500347) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Water Pump Impeller – Fits Honda Marine 8-20 HP (Replaces 19210-ZW9...
Water Pump Impeller – Fits Honda Marine 8-20 HP (Replaces 19210-ZW9-013, 18-3100, CEF500347) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller for Honda Outboard Motors is designed for reliable performance in Honda Marine 4-stroke engines, including 8, 9.9, and 10 HP models made up to the year 2000, as well as 8-20 HP models from 2000 and newer. It ensures your engine's cooling system functions efficiently, preventing overheating and maintaining optimal performance on the water.
This component serves as a direct replacement for several part numbers, including Honda 19210-ZW9-003 and 19210-ZW9-013, Sierra 18-3100, and CEF 500347, ensuring a precise fit and straightforward installation.
- Engineered for direct replacement installation.
- Durable 6-blade design crafted from wear-resistant rubber.
- Restores cooling system performance to prevent engine overheating.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number | Notes |
|---|---|---|
| Honda | 19210-ZW9-013 | Supersedes 19210-ZW9-003 |
| Honda | 19210-ZW9-003 | Superseded by 19210-ZW9-013 |
| Sierra | 18-3100 | Aftermarket equivalent |
| CEF | 500347 | Aftermarket equivalent |
| AM | AM19210-ZW9-013 | Aftermarket equivalent |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
For Honda Marine engines, verify your model, horsepower, and production year range to ensure correct fitment. Note that some models, particularly power thrust variants, have specific compatibility.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Honda | BF8B-D | 8 | 4-Stroke | Up to 2000 | 19210-ZW9-013 | Supersedes 19210-ZW9-003 |
| Honda | BF9.9D | 9.9 | 4-Stroke | Up to 2000 | 19210-ZW9-013 | Supersedes 19210-ZW9-003 |
| Honda | BF10B-D | 10 | 4-Stroke | Up to 2000 | 19210-ZW9-013 | Supersedes 19210-ZW9-003 |
| Honda | BF8D, BFP8D | 8 | 4-Stroke | 2000+ | 19210-ZW9-013 | Power thrust models |
| Honda | BF9.9D, BFP9.9D | 9.9 | 4-Stroke | 2000+ | 19210-ZW9-013 | Power thrust models |
| Honda | BF15-20 | 15-20 | 4-Stroke | 2000+ | 19210-ZW9-013 | [Verify compatibility] |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct replacement
- Connection
- Internal shaft insert (16mm)
- Housing Color
- Black (rubber)
- Dimensions
- External Diameter: 45.6mm, Internal (A): 13mm, Height (C): 14.8mm
- Fitting Type
- Direct drive
- Other Technical Attributes
- 6 blades
What’s in the Box
- 1 x Water Pump Impeller (19210-ZW9-013)
Installation Notes
- Disconnect the engine's battery and shift the outboard into neutral.
- Remove the lower unit (gearcase) by unbolting it from the engine midsection.
- Locate and unbolt the water pump housing to expose the old impeller.
- Note the rotational direction of the old impeller's blades before removing it.
- Thoroughly clean the inside of the pump housing and inspect for wear, scoring, or corrosion.
- Lightly lubricate the new impeller and housing interior with a marine-safe lubricant.
- Install the new impeller by sliding it onto the driveshaft while turning the shaft clockwise to correctly orient the blades.
- Reinstall the water pump housing, gaskets, and seals, ensuring bolts are torqued to spec.
- Reattach the lower unit to the engine and test operation in a suitable water source.
Troubleshooting & FAQ
How do I confirm this impeller fits my Honda engine?
Check your engine's model, horsepower (HP), and year of manufacture. Compare this information against the detailed compatibility table provided on this page. For 15-20 HP models listed as "Verify compatibility," it is critical to match your existing part number to 19210-ZW9-013 before ordering.
What are the signs of a failing water pump impeller?
Common signs include the engine overheating at idle or low speeds, a weak or intermittent water stream from the "tell-tale" outlet, and visible cracks or stiffness in the impeller blades upon inspection.
How often should a water pump impeller be replaced?
As a preventative maintenance item, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).
What is the difference between part 19210-ZW9-013 and 19210-ZW9-003?
The part number 19210-ZW9-013 officially supersedes 19210-ZW9-003. This means it is the current, recommended replacement for any engine that originally used the older part number.
What does "Power thrust models" mean?
"Power thrust" (BFP) models feature a different gearcase ratio and a larger-diameter propeller designed to provide more torque and control for heavier boats, such as pontoons or sailboats. This impeller fits both standard (BF) and power thrust (BFP) models as listed.
Is this an OEM or aftermarket part?
This listing is for an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It has been built to meet or exceed OEM-level specifications using comparable materials. All our parts are manufactured in an ISO 9002 certified facility and are batch-inspected for quality and consistency.
What are the shipping speed and cost?
We ship worldwide quickly, with typical transit times between 5–15 days for most regions. Standard shipping is free. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original packaging. See our full policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, typically arriving in 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
