Yamaha Water Pump Gasket – Replaces OEM 63D-44316-00

Product Details

This Water Pump Gasket is a replacement sealing component for the water pump assembly on select Yamaha outboard applications. It is intended to help seal the mating surfaces of the water pump assembly during water pump service and gasket replacement.

This gasket replaces Yamaha OEM reference 63D-44316-00. Confirm the complete engine model, year, stroke configuration, serial-number range, and the original gasket before ordering. A part-number match should be verified against your engine's service information because water pump components can vary between applications.

• Replacement gasket for a Yamaha water pump assembly
• OEM reference: 63D-44316-00
• Suitable for water pump maintenance when the original gasket is removed or damaged
• For freshwater and saltwater outboard service when correctly matched to the engine application

Part Number Information

Use the reference below to compare this replacement with the gasket specified for your water pump assembly.

Compatibility

The available catalog evidence identifies 63D-44316-00 as a Yamaha water pump gasket reference and lists it in a water pump assembly for selected Yamaha four-stroke applications, including F30 and F40A configurations in the cited catalog. This does not establish fitment for every Yamaha 40HP, 50HP, or 60HP engine.

Before purchasing, compare the OEM number, gasket shape, water pump diagram, engine model, year, stroke, and serial-number range with your outboard. Do not rely on horsepower alone to confirm compatibility.

Technical Specifications

Part Type

Water pump gasket

OEM Reference

63D-44316-00

Application

Water pump assembly sealing component

Product Configuration

Single replacement gasket

Brand Status

Aftermarket replacement; not a Yamaha-branded OEM component

What's in the Box

This listing is for the gasket only.

• 1 × Water Pump Gasket

The impeller, water pump housing, cover, wear plate, O-ring, key, fasteners, and other water pump components are not included unless specifically stated in the package contents.

Installation Notes

1. Use the service manual for your exact outboard model and follow the manufacturer's safety procedures.
2. Disconnect the battery and fuel supply as required, then remove the lower unit according to the service manual.
3. Remove the water pump components and carefully take out the old gasket.
4. Inspect the impeller, housing, cover, wear plate, key, O-ring, and mating surfaces for wear or damage. Replace any worn components as needed.
5. Clean the mating surfaces completely. Remove old gasket material without gouging the metal surfaces.
6. Position the new gasket in the correct orientation and align all openings and bolt holes.
7. Reassemble the water pump using the service-manual procedures and torque specifications for your engine.
8. Reinstall the lower unit, provide an appropriate water supply, and check for leaks and proper cooling-water flow before normal operation.

Troubleshooting & FAQ

What does this gasket seal?

This gasket seals mating surfaces in the water pump assembly. Its exact position should be confirmed from the water pump diagram for your engine.

Is this a complete water pump kit?

No. This listing is for one water pump gasket only. It does not include an impeller, housing, cover, wear plate, O-ring, key, bolts, or other kit components.

Does this fit every Yamaha 40HP, 50HP, or 60HP outboard?

No broad horsepower-only fitment claim can be made. Yamaha water pump parts vary by model, year, stroke, and serial-number range. Confirm OEM reference 63D-44316-00 and the complete engine application before ordering.

Can I reuse the old gasket?

A removed gasket should generally be replaced rather than reused. Reusing a compressed or damaged gasket can cause leakage and may contribute to cooling-system problems.

Do I need sealant?

Do not apply sealant unless the service manual for your exact engine specifies it. Clean, flat mating surfaces and correct gasket placement are essential for proper sealing.

Should the gasket be replaced when changing the impeller?

Replace the gasket whenever it is removed, damaged, compressed, or specified for replacement during water pump service. Inspect the rest of the water pump assembly at the same time.

Is this an OEM Yamaha part?

No. This is an aftermarket replacement gasket identified for the Yamaha OEM reference 63D-44316-00.

What should I verify before ordering?

Verify the exact engine model, year, stroke, shaft configuration where applicable, serial-number range, OEM reference, and the shape and opening layout of your original gasket. If any detail differs, consult the engine service manual or a qualified marine technician.

Safety & Important Information

• Installation should be performed by a qualified technician or by a person familiar with outboard service procedures.
• Never operate an outboard without an adequate cooling-water supply.
• Follow all service-manual torque values, sealing instructions, and lower-unit installation procedures.
• Do not purchase based on horsepower alone; verify the exact application and OEM reference.
• Stop operation immediately if the engine overheats, the tell-tale flow is abnormal, or water leaks are observed after service.

About Sea Sierra

• Marine Replacement Parts — Practical replacement components for routine outboard maintenance and repair.
• Application-Focused Listings — Product references are provided to help you compare the part with your engine and original component.
• Service-Ready Information — Always use the exact engine service manual for installation and final fitment confirmation.