6E0-W006A-00 Water Pump Housing Kit for Yamaha 4AC 5C MSHKZ AS CMH CS | JLM Marine

Water Pump Housing Kit – Fits Yamaha 4HP & 5HP Outboards (1984-2002)

This comprehensive water pump housing kit is designed for Yamaha 4HP (1984-1999) and 5HP (1984-2002) outboard engines, including models 4AC, MSHKZ, AS, 5C, CMH, and CS. It provides all essential components for a complete water pump service, ensuring reliable cooling system performance and extending engine life.

This kit directly replaces OEM part number 6E0-W006A-00, offering a complete solution for routine maintenance or repair of your Yamaha outboard's cooling system.

• Includes 14 components: water pump housing, impeller, gaskets, seals, thermostat, fuel filter, anode, gear oil pump, and all necessary hardware
• Complete rebuild kit eliminates the need to source individual parts
• Suitable for both routine maintenance and emergency repairs

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 kit includes 14 components for a complete water pump rebuild:

• 6E0-44311-00 – Water Pump Housing × 1
• 6E0-44315-A0 – Gasket × 1
• 6E0-44322-02 – Cartridge Insert × 1
• 6E0-44323-00 – Outer Plate × 1
• 6E0-44352-00 – Impeller × 1 (critical wear component)
• 6E0-44366-00 – Water Seal Damper × 1
• 93604-09066 – Dowel Pin × 1
• 97080-06045 – Bolt × 4
• 646-24251-02 – Fuel Filter × 1
• 6E5-12411-01 – Thermostat × 1
• 90430-08020 – Drain Gasket × 4
• 91490-25030-00 – Cotter Pin × 1
• 6L5-45251-02 – Anode × 1
• 24OP149 – Gear Oil Pump × 1

Installation Guide

1. Disconnect the fuel line and remove the lower unit from the outboard motor. Drain any remaining gear oil completely.
2. Remove the old water pump housing by unscrewing the mounting bolts. Carefully extract the old impeller and note its orientation.
3. Clean all mating surfaces thoroughly, removing old gasket material, corrosion, and debris. Inspect the driveshaft for wear or damage.
4. Install the new drain gaskets (90430-08020) on the lower unit. Replace the anode (6L5-45251-02) if corroded or worn.
5. Lubricate the new impeller (6E0-44352-00) with water or glycerin. Insert it into the housing with blades oriented in the correct rotation direction.
6. Position the cartridge insert (6E0-44322-02) and outer plate (6E0-44323-00) into the housing assembly. Ensure alignment with the dowel pin (93604-09066).
7. Install the new gasket (6E0-44315-A0) on the lower unit mating surface. Apply a thin layer of marine grease to prevent leaks.
8. Mount the new water pump housing (6E0-44311-00) onto the lower unit. Secure with the four bolts (97080-06045), tightening in a cross pattern.
9. Install the water seal damper (6E0-44366-00) and secure with the cotter pin (91490-25030-00). Ensure proper seating to prevent vibration.
10. Replace the thermostat (6E5-12411-01) in the powerhead, ensuring correct orientation for proper cooling system operation.
11. Install the new fuel filter (646-24251-02) and gear oil pump (24OP149) according to manufacturer specifications.
12. Reassemble the lower unit to the outboard, refill with fresh gear oil, and test the cooling system. Check for proper water discharge from the telltale port.

Troubleshooting & FAQ

Q: How do I know if my water pump needs replacement?
A: Common signs include reduced or no water flow from the telltale port, engine overheating, steam from the powerhead, or the overheat alarm sounding. If your engine is older than 2-3 years or has logged 200+ hours without a water pump service, replacement is recommended as preventive maintenance.

Q: How do I confirm this kit fits my specific Yamaha engine?
A: Cross-reference your engine's model and year with the compatibility table above. Your engine model is typically found on the identification plate mounted on the transom bracket. Verify that your original part number matches 6E0-W006A-00 for guaranteed fitment.

Q: How often should I replace my water pump?
A: Yamaha recommends water pump impeller replacement every 2-3 years or 200-300 operating hours, whichever comes first. If your engine operates in sandy, silty, or debris-filled water, consider more frequent replacement (annually or every 100 hours).

Q: What's the difference between this kit and the OEM Yamaha kit?
A: This is an aftermarket replacement part built to OEM specifications using comparable-grade materials. It includes all 14 components needed for a complete rebuild at a more competitive price point. While not manufactured by Yamaha, it is produced in an ISO9002-certified facility with rigorous quality control.

Q: Why does this kit include a fuel filter and thermostat?
A: This is a comprehensive service kit designed for complete lower unit maintenance. The fuel filter and thermostat are commonly replaced during water pump service intervals to ensure overall engine reliability and performance.

Q: Is this an OEM part or aftermarket?
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.