Water Pump Housing – Fits Yamaha 55HP C55 Outboards (Replaces 663-44311-02-00)

Water Pump Housing – Fits Yamaha 55HP C55 Outboards (Replaces 663-44311-02-00)

This aftermarket water pump housing is designed for Yamaha 2-Stroke 55HP (C55) outboard models manufactured between 1991 and 1994. It serves as a direct replacement, ensuring proper fit and function for cooling system repairs.

It directly replaces Yamaha OEM part number 663-44311-02-00 and is interchangeable with aftermarket part numbers from Sierra (9-43255) and GLM (12446).

• Installation Type: Direct OEM replacement.
• Construction: Built to meet or exceed original equipment specifications.
• Component: This is a single housing component. The complete water pump repair kit is sold separately.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

This is a single component part. The water pump housing is sold separately and does not include a complete repair kit.

Installation Guide

1. Disconnect Power: Start by disconnecting the battery terminals to prevent electrical accidents.
2. Access the Lower Unit: Drain the gearcase oil from the lower unit.
3. Remove Lower Unit: Unbolt and carefully detach the lower unit from the outboard's midsection.
4. Remove Old Housing: Locate the water pump assembly and unbolt the old housing to remove it.
5. Inspect Components: Check the impeller, wear plate, and gaskets (not included) for wear or damage. Replace them if necessary.
6. Clean Surfaces: Thoroughly clean the mounting surfaces where the new housing will sit to ensure a perfect seal.
7. Install New Housing: Position the new water pump housing and secure it by tightening the bolts to the manufacturer's recommended torque specifications.
8. Reassemble: Reinstall the lower unit onto the outboard motor.
9. Refill and Test: Refill the gearcase with the correct type and amount of lube. Reconnect the battery and run the engine on a water supply to check for proper cooling system operation.

Troubleshooting & FAQ

How do I confirm this housing fits my Yamaha engine?
This housing is confirmed to fit Yamaha C55 models from 1991-1994 and is listed for E48 models. The most reliable method is to verify that your existing part number is 663-44311-02-00. Use our compatibility table and cross-reference guides to be certain.

Is this a complete water pump kit?
No, this listing is for the water pump housing only. It is a single component and does not include the impeller, gaskets, or other parts found in a complete repair kit (sold separately).

What are common signs of a failed water pump housing?
Key indicators include the engine overheating, a noticeably weak or non-existent water stream from the "tell-tale" outlet, or discovering visible cracks, warping, or corrosion on the housing during an inspection.

OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.