Water Pump Impeller O-Ring – Fits Honda 8HP 9.9HP 10HP 4-Stroke (Replaces 91301-ZG3-000)
Water Pump Impeller O-Ring – Fits Honda 8HP 9.9HP 10HP 4-Stroke (Replaces 91301-ZG3-000) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Water Pump Impeller O-Ring – Fits Honda 8HP 9.9HP 10HP 4-Stroke (Re...
Water Pump Impeller O-Ring – Fits Honda 8HP 9.9HP 10HP 4-Stroke (Replaces 91301-ZG3-000) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller O-Ring – Fits Honda 8HP 9.9HP 10HP 4-Stroke (Replaces 91301-ZG3-000) is an essential seal component for Honda 4-stroke outboard engines ranging from 8 to 10 horsepower. Designed to fit BF8D, BFP8D, BF9.9D, BFP9.9D, BF10D, BF10B, BFP10D, and BFP10B models spanning 2002–2006 and all years for 10HP variants, this o-ring ensures proper sealing within the water pump assembly to prevent leaks and maintain optimal cooling performance.
This aftermarket replacement directly supersedes Honda OEM part number 91301-ZG3-000.
- Direct fit for Honda 4-stroke outboards 8–10 HP
- Critical seal for water pump impeller housing integrity
- Compatible with BF and BFP series engines
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Honda | 91301-ZG3-000 | OEM reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Honda | BF8D | 8 | 4-Stroke | 2002–2006, K0, K2, K3 | 91301-ZG3-000 |
| Honda | BFP8D | 8 | 4-Stroke | 2002–2006, K0, K2, K3 | 91301-ZG3-000 |
| Honda | BF9.9D | 9.9 | 4-Stroke | 2002–2006, K0, K2, K3 | 91301-ZG3-000 |
| Honda | BFP9.9D | 9.9 | 4-Stroke | 2002–2006, K0, K2, K3 | 91301-ZG3-000 |
| Honda | BF10D | 10 | 4-Stroke | All years | 91301-ZG3-000 |
| Honda | BF10B | 10 | 4-Stroke | All years | 91301-ZG3-000 |
| Honda | BFP10D | 10 | 4-Stroke | All years | 91301-ZG3-000 |
| Honda | BFP10B | 10 | 4-Stroke | All years | 91301-ZG3-000 |
Technical Specs
- OEM Reference
- 91301-ZG3-000
- Part Type
- Water Pump Impeller O-Ring
- Fitment
- Honda 4-Stroke Outboards 8–10 HP
- Material
- Marine-grade elastomer
What's in the Box
- 1 × O-Ring (91301-ZG3-000)
Installation Notes
- Disconnect fuel line and remove engine cowling to access the lower unit.
- Drain the lower unit gear oil completely and remove the lower unit from the midsection.
- Remove the water pump housing by unfastening the retaining bolts.
- Carefully remove the old impeller and associated o-rings from the housing.
- Inspect the housing and pump cavity for debris, scoring, or corrosion; clean thoroughly.
- Lubricate the new o-ring with marine grease to ease installation and ensure proper sealing.
- Install the new o-ring into the designated groove, ensuring it seats evenly without twisting.
- Reassemble the impeller, housing, and lower unit in reverse order, torquing fasteners to manufacturer specifications.
- Refill the lower unit with the correct marine gear oil and test for leaks before returning the engine to service.
Troubleshooting & FAQ
How do I know if my water pump o-ring needs replacement?
Signs include visible coolant leaks around the water pump housing, overheating engine, weak telltale stream, or visible cracking and hardening of the existing o-ring during routine maintenance.
Can I reuse the old o-ring during impeller replacement?
No. O-rings are single-use seal components that compress and deform during installation. Reusing an old o-ring significantly increases the risk of coolant leaks and impeller failure.
What happens if the o-ring is installed dry?
Installing without lubrication can cause the o-ring to twist, pinch, or tear during reassembly, leading to immediate or premature seal failure and potential engine overheating.
Is this o-ring compatible with both BF and BFP Honda series?
Yes. This o-ring fits both standard BF and power-trim BFP models within the 8–10 HP 4-stroke range, as specified in the compatibility table above.
How often should the water pump o-ring be replaced?
Replace the o-ring every time you service the water pump impeller, typically every 2–3 years or 200–300 hours of operation, whichever comes first.
What is the difference between OEM and aftermarket o-rings?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
How fast will my order ship, and what does it cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What warranty and return options are available?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Will this o-ring work if my engine year is not listed?
Cross-check your engine's service manual or parts diagram with OEM part number 91301-ZG3-000. If your manual references this number, the o-ring will fit regardless of year.
Safety & Important Info
- Verify images/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 tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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