Water Pump Impeller Gasket for Honda BF115, BF135 and BF150 4-Stroke Outboards – Replaces 19234-ZY6-000

Product Details

This Water Pump Impeller Gasket is a single replacement gasket for the water pump assembly on select Honda 4-stroke outboard engines. It is identified as Honda OEM part number 19234-ZY6-000 and is listed as an impeller gasket for selected BF115, BF135, BF140 and BF150 applications.

Use the model and application information below as a guide, and confirm the complete engine model, variant and serial-number range against your Honda parts diagram before ordering.

• Seals the water pump impeller assembly and helps prevent cooling-water leakage
• Suitable for water pump service, impeller replacement and maintenance work where this part number is specified
• Single gasket replacement; water pump housing, impeller, key and other service parts are not included

Part Number Matrix

Use this matrix to compare the applicable manufacturer reference.

Engine & Model Compatibility

The following Honda 4-stroke model designations are associated with this gasket in the available parts references. Model suffixes, production changes and serial-number conditions can affect fitment, so verify your exact engine identification before installation.

Technical Specs

Part Type

Water pump impeller gasket

Manufacturer Part Number

19234-ZY6-000

Catalog Description

Gasket B, impeller

Application

Water pump impeller assembly

Product Type

Single replacement gasket

What's in the Box

• 1 × Water pump impeller gasket

The impeller, water pump housing, drive key, fasteners and other components are not included.

Installation Notes

1. Disconnect the battery and secure the outboard according to the instructions in the service manual.
2. Remove the propeller and lower unit as required to access the water pump assembly. Follow the service manual for gear-oil draining and lower-unit procedures.
3. Remove the water pump housing and old impeller gasket, taking care not to damage the mating surfaces.
4. Clean the mating surfaces thoroughly and remove all old gasket material, corrosion and debris.
5. Position the new gasket on the water pump assembly, aligning it with the locating features and bolt holes.
6. Inspect the impeller, key, housing and wear surfaces. Replace worn or damaged components as required.
7. Reassemble the water pump using the service manual's installation sequence and specified torque values.
8. Reinstall the lower unit and any removed components, then test the engine with an appropriate flushing adapter or in the water.
9. Confirm a strong telltale stream and monitor the engine for leaks or overheating before returning it to service.

Troubleshooting & FAQ

How do I know if the water pump gasket needs replacement?

Replace the gasket when it is removed during water pump service, or if it shows compression damage, tears, deformation or evidence of leakage. Overheating or a weak telltale stream can have several causes, so inspect the complete cooling system rather than replacing the gasket alone.

Can I reuse the old gasket if it looks intact?

Reusing a removed gasket is not recommended. A gasket may have compressed or taken a set even when visible damage is not obvious. Install a new gasket during water pump service for the best chance of maintaining a proper seal.

Does this listing include an impeller or water pump kit?

No. This listing is for one water pump impeller gasket only. The impeller, key, housing, plate and other water pump service components are not included.

Will this gasket fit every Honda BF115, BF135, BF140 or BF150?

Not necessarily. The available references associate part number 19234-ZY6-000 with selected BF115, BF135, BF140 and BF150 model variants. Confirm the complete model designation and serial-number range in your Honda parts diagram before ordering.

Do I need sealant with this gasket?

Use the installation method specified by the Honda service manual for your exact engine. Do not apply sealant unless the service instructions specifically call for it, and keep sealant away from water passages.

What happens if the gasket fails?

A damaged or incorrectly installed gasket can allow water to leak or bypass the intended water-pump sealing surfaces. This may reduce cooling-system performance and contribute to overheating. Stop operation if the engine overheats or the cooling-water flow is abnormal.

Is this an OEM Honda part?

This listing is for an aftermarket replacement gasket identified for use with Honda manufacturer part number 19234-ZY6-000. Honda is a trademark of Honda Motor Co., Ltd.; this product is not represented as a Honda-branded component.

Safety & Important Info

• Verify the complete engine model, variant and serial-number range before purchase.
• Do not rely on horsepower alone to determine fitment.
• Use the correct service-manual procedures and torque specifications for your engine.
• Inspect the complete water pump and cooling system when servicing the gasket.
• Professional installation is recommended if you are not experienced with outboard lower-unit or water-pump service.

About Sea Sierra

• Marine Replacement Parts — We supply replacement components for routine outboard maintenance and repair.
• Application-Focused Information — Product references and compatibility details are provided to help you compare the part with your engine identification.
• Service-Ready Selection — Choose the correct individual component for your water pump service rather than assuming a complete kit is included.