6L2-W006A-00 Maintenance Kit for Yamaha 20HP 25HP 2-Stroke | JLM Marine

Maintenance Kit for Yamaha 20HP 25HP 2-Stroke – 6L2-W006A-00

This comprehensive maintenance kit is designed for Yamaha 20 HP and 25 HP 2-Stroke Twin Carby models (1988-2016). It provides all essential components needed for routine servicing, ensuring your outboard runs smoothly and reliably season after season.

Direct OEM replacement number: 6L2-W006A-00. This aftermarket kit includes critical water pump components, fuel filter, thermostat assembly, gaskets, and gear oil pump—everything required for a complete maintenance refresh.

• Complete 12-piece maintenance kit covering water pump, fuel system, and cooling system
• Fits 20–25 HP 2-Stroke Twin Carby Yamaha outboards (1988-2016)
• Includes impeller, thermostat, fuel filter, gaskets, and gear oil pump

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 12 components:

• 90280-03024 – Key x1
• 6L2-44352-00 – Impeller x1
• 93210-45161 – O-ring x1
• 6L2-44322-00 – Cup, Insert x1
• 6L2-44323-00 – Plate, Wear x1
• 97095-06040 – Bolt x4
• 61N-24560-00 – Fuel Filter x1
• 6E5-12411-30 – Thermostat x1
• 6J8-12414-A0 – Thermostat Gasket x1
• 90430-08020 – Drain Gasket x4
• 91490-30025 – Cotter Pin x1
• 24OP149 – Gear Oil Pump x1

Installation Guide

1. Preparation: Disconnect the battery and ensure the engine is cool. Gather all tools needed: screwdrivers, wrenches, and a torque wrench.
2. Remove Lower Unit: Drain the gear oil using the drain screw, then unbolt and carefully remove the lower unit from the mid-section.
3. Access Water Pump: Remove the water pump housing cover by unscrewing the bolts. Keep track of bolt locations for reassembly.
4. Replace Impeller & Components: Remove the old impeller, insert cup, and wear plate. Install the new impeller (using the key provided), insert cup, and wear plate from the kit.
5. Install Gaskets & O-ring: Replace the old O-ring and gaskets with the new ones included in the kit. Ensure all mating surfaces are clean and free of debris.
6. Reassemble Water Pump: Reinstall the water pump housing using the new bolts provided. Torque bolts evenly in a star pattern to manufacturer specifications.
7. Replace Fuel Filter: Locate the inline fuel filter, disconnect fuel lines carefully, and replace with the new fuel filter. Ensure clamps are secure to prevent leaks.
8. Replace Thermostat: Remove the thermostat cover, extract the old thermostat, and install the new thermostat with the new gasket. Ensure proper orientation (check flow direction).
9. Install Drain Gaskets: Replace all four drain gaskets on applicable drain plugs to ensure watertight seals.
10. Reinstall Lower Unit: Apply marine grease to the driveshaft splines, align the lower unit with the mid-section, and secure with bolts. Install the cotter pin as needed.
11. Refill Gear Oil: Using the new gear oil pump, refill the lower unit with fresh gear oil until it flows from the upper vent hole. Install both drain and vent plugs with new gaskets.
12. Test & Inspect: Reconnect the battery, run the engine in a test tank or on-water, and check for proper water flow from the tell-tale. Inspect all connections for leaks and proper operation.

Troubleshooting & FAQ

Q: How do I confirm this maintenance kit fits my Yamaha outboard?
A: This kit is designed for Yamaha 20 HP and 25 HP 2-Stroke Twin Carby models from 1988 to 2016. Verify your engine model and year against the compatibility table above, and cross-reference the OEM part number 6L2-W006A-00 with your engine's parts diagram.

Q: How often should I perform maintenance with this kit?
A: We recommend replacing the impeller and water pump components annually or every 100 operating hours, whichever comes first. The fuel filter and thermostat should be inspected during each service interval and replaced as needed or every 1-2 years.

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

Q: Can I use this kit if I'm not a professional mechanic?
A: While experienced DIYers can perform this maintenance with basic tools and mechanical knowledge, we recommend professional installation if you're unfamiliar with outboard servicing. Improper installation can lead to overheating or water intrusion issues.

Q: What's the difference between this aftermarket kit and the OEM Yamaha kit?
A: This is an aftermarket replacement kit built to OEM specifications using comparable-grade materials. It includes all the same components as the OEM kit at a more competitive price point, providing reliable performance without the premium cost.

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.