6W4-W006A-00 Maintenance Kit for Yamaha 60HP 70HP 2-Stroke | JLM Marine

Maintenance Kit for Yamaha 60HP 70HP 2-Stroke – OEM 6W4-W006A-00

This comprehensive maintenance kit is designed for Yamaha 2-stroke outboard engines rated at 60-70 HP, covering model years 1984-2003. It provides all essential components needed for routine service intervals, including impeller, thermostats, gaskets, fuel filter, and drain hardware.

Direct replacement for Yamaha OEM part number 6W4-W006A-00, ensuring compatibility and reliable performance across multiple service applications.

• Complete 16-piece service kit with water pump, fuel, and thermostat components
• Fits Yamaha 60-70HP 2-stroke engines from 1984 to 2003
• Includes gear oil pump and all necessary gaskets for comprehensive maintenance

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 maintenance kit includes the following 16 components for complete service:

• 688-44316-A0 – Gasket × 1
• 97095-08045 – Bolt × 2
• 6H3-44315-A0 – Gasket × 1
• 6H3-44324-A0 – Gasket × 1
• 6H3-44352-00 – Impeller × 1
• 90280-03M03 – Key × 1
• 663-44322-00 – Cup, Insert × 1
• 93210-46044 – O-ring × 1
• 97095-08055 – Bolt × 2
• 6H3-44323-00 – Plate, Wear × 1
• 655-24560-00 – Fuel Filter × 1
• 6E5-12411-30 – Thermostat × 1
• 6H3-12414-A1 – Thermostat Gasket × 1
• 90430-08020 – Drain Gasket × 4
• 91490-30025 – Cotter Pin × 1
• 24OP149 – Gear Oil Pump × 1

Installation Guide

1. Disconnect the fuel line and remove the lower unit from the engine following your service manual. Inspect all mounting surfaces for damage or corrosion.
2. Remove the old water pump housing cover and extract the worn impeller, noting its rotation direction. Clean all gasket surfaces thoroughly.
3. Install the new wear plate (6H3-44323-00) onto the pump housing, ensuring proper alignment. Apply a light coating of marine grease to the cavity.
4. Lubricate the new impeller (6H3-44352-00) with marine grease and insert it into the housing with blades oriented correctly. Install the key (90280-03M03) into the driveshaft slot.
5. Position the insert cup (663-44322-00) and install new gaskets (6H3-44315-A0, 6H3-44324-A0, 688-44316-A0) onto their respective surfaces. Do not reuse old gaskets.
6. Install the O-ring (93210-46044) into its groove and secure the pump housing cover with the provided bolts (97095-08045, 97095-08055). Torque to manufacturer specifications.
7. Remove the old thermostat and gasket from the cylinder head. Clean the seating surface and inspect for pitting or warping.
8. Install the new thermostat (6E5-12411-30) with the spring facing inward, followed by the new gasket (6H3-12414-A1). Secure the cover plate evenly.
9. Replace all four drain gaskets (90430-08020) on the lower unit drain plugs. Reinstall plugs and torque properly.
10. Install the new fuel filter (655-24560-00) in the fuel line, ensuring arrow direction matches fuel flow. Secure with hose clamps.
11. Use the included gear oil pump (24OP149) to refill the lower unit with fresh gear oil until it flows from the upper vent hole. Install the cotter pin (91490-30025) as specified in your service manual.
12. Reinstall the lower unit, reconnect the fuel line, and run the engine briefly to check for leaks. Verify proper water flow from the tell-tale indicator.

Troubleshooting & FAQ

Q: How do I confirm this maintenance kit fits my specific Yamaha engine?
A: Verify that your engine is a Yamaha 60HP or 70HP 2-stroke model manufactured between 1984 and 2003. Cross-reference your existing part number 6W4-W006A-00 or consult the Yamaha parts diagrams linked above using your engine's serial number.

Q: How often should I replace the components in this maintenance kit?
A: Yamaha recommends replacing the water pump impeller annually or every 100 hours of operation, whichever comes first. Thermostats and fuel filters should be inspected during each major service and replaced every 200-300 hours or if signs of wear or restriction appear.

Q: What are the signs that my water pump impeller needs replacement?
A: Common symptoms include reduced or no water flow from the tell-tale, engine overheating, steam from the engine, or weak water stream. If you notice any of these, inspect and replace the impeller immediately to prevent engine damage.

Q: Can I install this maintenance kit myself or do I need a professional?
A: If you have mechanical experience and access to a service manual with torque specifications, you can perform this maintenance yourself. However, professional installation is recommended to ensure all components are correctly installed, torqued, and tested for proper operation.

Q: Does this kit include everything I need for a complete service?
A: This kit includes the major maintenance components: water pump parts, thermostats, gaskets, fuel filter, and gear oil pump. You will need to supply gear oil, marine grease, and basic hand tools separately.

Q: OEM vs. 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.