632-W006A-00 Water Pump Repair Kit for Yamaha 40HP 50HP 2-Stroke | JLM Marine

632-W006A-00 Water Pump Repair Kit for Yamaha 40HP 50HP 2-Stroke | JLM Marine

This comprehensive water pump repair kit is engineered for Yamaha 2-stroke 3-cylinder outboard engines rated at 40HP and 50HP, covering model years 1995–2019. It provides all essential components to restore your engine's cooling system to optimal performance, ensuring reliable operation on the water.

Designed as a direct replacement for OEM part number 632-W006A-00, this kit consolidates critical wear items and sealing components into a single, convenient package. Whether you're performing routine maintenance or addressing overheating issues, this kit delivers the parts you need for a complete water pump service.

• Includes 15 components: impeller, wear plate, gaskets, o-ring, thermostat, fuel filter, gear oil pump, and hardware
• Fits Yamaha 40HP and 50HP 2-stroke 3-cylinder engines (1995–2019)
• Complete rebuild solution for cooling system maintenance and repair

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 comprehensive repair kit includes 15 precision-engineered components for complete water pump service:

• 6H3-44352-00 Impeller × 1
• 63D-44323-00 Plate, Wear × 1
• 63D-44322-00 Cup, Insert × 1
• 63D-44316-00 Gasket × 1
• 93210-59MG7 O-ring × 1
• 90280-03024 Key × 1
• 63D-44312-00 Cover × 1
• 663-44366-00 Grommet × 1
• 90119-08M15 Bolt × 4
• 61N-24560-00 Fuel Filter × 1
• 6E5-12411-30 Thermostat × 1
• 6J8-12414-A0 Thermostat Gasket × 1
• 90430-08020 Drain Gasket × 4
• 91490-30025 Cotter Pin × 1
• 24OP149 Gear Oil Pump × 1

Installation Guide

1. Prepare the workspace: Disconnect the battery and gather necessary tools including screwdrivers, wrenches, and a drain pan.
2. Access the water pump: Remove the lower unit from the outboard engine following manufacturer guidelines. Drain any remaining gear oil into the pan.
3. Remove the old pump housing: Unbolt the existing water pump cover using the appropriate socket. Carefully pull the housing free from the drive shaft.
4. Extract worn components: Remove the old impeller, wear plate, insert cup, and gaskets. Inspect the pump housing for damage or corrosion.
5. Clean all surfaces: Thoroughly clean the pump housing and mating surfaces with a non-abrasive cleaner to ensure proper sealing.
6. Install the insert cup and wear plate: Position the new insert cup (63D-44322-00) and wear plate (63D-44323-00) into the housing with correct orientation.
7. Lubricate and install the impeller: Apply marine-grade grease to the new impeller (6H3-44352-00) blades. Install it onto the drive shaft with blades oriented in the correct rotation direction.
8. Install gaskets and o-ring: Place the new gasket (63D-44316-00) and o-ring (93210-59MG7) into their respective positions, ensuring proper seating.
9. Reassemble the pump housing: Install the new cover (63D-44312-00) and grommet (663-44366-00). Secure with the four new bolts (90119-08M15), tightening in a cross pattern.
10. Install thermostat components: Replace the thermostat (6E5-12411-30) and thermostat gasket (6J8-12414-A0) in the powerhead. Replace drain gaskets (90430-08020) and secure the cotter pin (91490-30025).
11. Replace filters and oil pump: Install the new fuel filter (61N-24560-00) and gear oil pump (24OP149) according to service manual specifications.
12. Reassemble and test: Reattach the lower unit to the engine, refill with fresh gear oil, reconnect the battery, and perform a water test to verify proper cooling flow and operation.

Troubleshooting & FAQ

Q: How do I know if my water pump needs to be replaced?
A: Common signs include overheating alarms, reduced water flow from the tell-tale (indicator stream), steam from the engine, or weak discharge. If your engine is running hotter than normal or you notice decreased water pressure, it's time to inspect and likely replace the water pump components.

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend inspecting the impeller annually and replacing it every 2–3 years or 200–300 hours of operation, whichever comes first. If you operate in sandy or debris-filled water, more frequent replacement may be necessary.

Q: Can I replace just the impeller, or do I need the entire kit?
A: While you can replace the impeller alone, it's best practice to replace all wear components (gaskets, seals, wear plate, and insert cup) at the same time. This kit provides everything needed to ensure a leak-free, long-lasting repair and prevents repeated disassembly.

Q: Will this kit fit both 40HP and 50HP engines from 1995 to 2019?
A: Yes, this kit is designed to fit Yamaha 40HP (1995–2016) and 50HP (1995–2019) 2-stroke 3-cylinder engines. Always verify your engine's model and serial number against the compatibility table to confirm proper fitment before ordering.

Q: What's the difference between this aftermarket kit and the OEM version?
A: 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.

Q: How fast do you ship and how much does it cost?
A: 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.

Q: What is your warranty and return policy?
A: 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.