Honda Water Pump O-Ring 91356-ZV5-000 – Fits BF25 BF30 BF35 BF40 BF45 BF50 4-Stroke Outboards
Honda Water Pump O-Ring 91356-ZV5-000 – Fits BF25 BF30 BF35 BF40 BF45 BF50 4-Stroke Outboards is backordered and will ship as soon as it is back in stock.
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Honda Water Pump O-Ring 91356-ZV5-000 – Fits BF25 BF30 BF35 BF40 BF...
Honda Water Pump O-Ring 91356-ZV5-000 – Fits BF25 BF30 BF35 BF40 BF45 BF50 4-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This water pump O-ring is an aftermarket replacement for the sealing position in the water pump or impeller housing of selected Honda 4-stroke marine outboards. It is listed for Honda BF25, BF30, BF35, BF40, BF45, and BF50 models that use OEM reference 91356-ZV5-000.
The O-ring helps seal the water pump assembly and maintain the integrity of the outboard cooling system. Confirm the model and original part number before ordering, because model families may have different parts depending on the exact configuration.
- Replacement water pump O-ring for selected Honda marine outboards
- Used in the water pump or impeller housing sealing location
- Aftermarket replacement for Honda OEM reference 91356-ZV5-000
- One individual O-ring; water pump, impeller, housing, and other parts are not included
Part Number Matrix
Use this reference to compare the replacement with the part specified for your engine.
| Brand | Part Number | Part Description |
|---|---|---|
| Honda | 91356-ZV5-000 | Water pump O-ring |
Engine & Model Compatibility
The catalog occurrences for this part number identify the following Honda 4-stroke models. Year and serial-number ranges were not provided, so verify the engine identification plate and the original part before installation.
| Brand | Model | Rated HP | Stroke | Year / Serial Condition | OEM Part No. |
|---|---|---|---|---|---|
| Honda | BF25 | 25 HP | 4-Stroke | Not specified | 91356-ZV5-000 |
| Honda | BF30 | 30 HP | 4-Stroke | Not specified | 91356-ZV5-000 |
| Honda | BF35 | 35 HP | 4-Stroke | Not specified | 91356-ZV5-000 |
| Honda | BF40 | 40 HP | 4-Stroke | Not specified | 91356-ZV5-000 |
| Honda | BF45 | 45 HP | 4-Stroke | Not specified | 91356-ZV5-000 |
| Honda | BF50 | 50 HP | 4-Stroke | Not specified | 91356-ZV5-000 |
Technical Specs
- Part Type
- Water pump O-ring
- OEM Replacement Reference
- Honda 91356-ZV5-000
- Application
- Water pump or impeller housing sealing position
- Compatible Brand
- Honda Marine
- Compatible Models Listed
- BF25, BF30, BF35, BF40, BF45, and BF50
- Stroke
- 4-Stroke
- Year / Serial Range
- Not specified; verify before ordering
What's in the Box
- 1 × Water pump O-ring
Installation Notes
- Stop the engine, remove the key, disconnect the battery, and follow the applicable Honda service manual.
- Remove the lower unit and water pump components as directed by the service procedure.
- Remove the old O-ring and clean the groove and mating surfaces. Remove corrosion, dirt, and old sealing material without damaging the housing.
- Compare the replacement O-ring with the original part and confirm that the size and profile are correct.
- Install the O-ring evenly in its designated groove. Do not twist, pinch, stretch excessively, or cut the seal during installation.
- Reassemble the water pump and lower unit using the service manual's component orientation, fasteners, and torque specifications.
- Run the engine only in an appropriate test tank or as otherwise specified by the service manual, then check for leaks and verify cooling-water discharge.
Troubleshooting & FAQ
What type of part is this?
This listing is for one water pump O-ring. It is not a complete impeller, water pump housing, or water pump repair kit.
Which Honda engines are listed for this O-ring?
The available catalog references list Honda BF25, BF30, BF35, BF40, BF45, and BF50 4-stroke outboards. The available records do not specify complete year or serial-number ranges.
Is this the same as a water pump impeller seal?
No. The catalog identifies 91356-ZV5-000 as a water pump O-ring. It is a ring-shaped gasket used at the specified water pump or impeller housing sealing location, not the rotating impeller and not a generic shaft seal.
Can I replace only the O-ring?
Yes, if the impeller, housing, plate, and other water pump components are within serviceable condition. Inspect the complete water pump assembly while it is disassembled and replace any worn or damaged parts.
How do I confirm fitment?
Match the engine model, stroke, service-manual application, and original O-ring number. Because year and serial conditions are not specified in the available records, do not rely on horsepower alone.
Is this an OEM Honda part?
No. This listing is for an aftermarket replacement. Honda 91356-ZV5-000 is shown as the OEM reference number for identification and cross-reference purposes.
What should I do if the O-ring leaks after installation?
Stop operating the engine and inspect the O-ring for twisting, pinching, cuts, incorrect seating, or damage to the mating groove. Also check the water pump housing and related components, then reinstall or replace parts according to the service manual.
Safety & Important Information
- Verify the engine model, 4-stroke configuration, and original part number before purchase.
- Year and serial-number coverage is not specified; confirm fitment with the applicable service documentation.
- This is an aftermarket replacement, not an OEM Honda component.
- Use the correct service-manual procedures and torque specifications. Professional installation is recommended if you are not familiar with lower-unit or water-pump service.
- Do not operate an outboard without an adequate cooling-water supply.
About Sea Sierra
- We supply replacement marine parts for routine maintenance and repair applications.
- Product references are provided to help you compare the replacement with the part required for your engine.
- For the best fit, always verify the complete engine model and the original manufacturer part number before ordering.
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