6G8-W006A-00 Maintenance Kit for Yamaha F20A F25A F25D | JLM Marine

6G8-W006A-00 Maintenance Kit for Yamaha F20A F25A F25D | JLM Marine

This comprehensive maintenance kit is designed to fit Yamaha 4-stroke outboard engines F20A, F25A, and F25D (25 HP) across model years 1998–2017. It provides all essential service components—including water pump parts, filters, thermostat, anodes, and gaskets—in one convenient package to streamline your routine maintenance.

Direct OEM Replacement: 6G8-W006A-00

• Includes complete water pump rebuild components (impeller, housing, gaskets, seals, and hardware)
• Features fuel filter, oil filter, thermostat assembly, drain gaskets, and sacrificial anode
• Covers Yamaha F25HP DEHTL, DETL, and DMHL models from 2009–2017

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 components:

• 61N-44322-00 – Cup, Insert × 1
• 6H4-44352-02 – Impeller × 1
• 61N-44311-00 – Housing, Water Pump × 1
• 6L2-44367-00 – Seal, Water × 1
• 90280-03024 – Key × 1
• 93210-45161 – O-ring × 1
• 61N-44323-00 – Plate, Wear × 1
• 97095-06040 – Bolt × 4
• 61N-24560-10 – Fuel Filter × 1
• 5GH-13440-00 – Oil Filter × 1
• 6G8-12411-00 – Thermostat × 1
• 62Y-12414-00 – Thermostat Gasket × 1
• 90430-08020 – Drain Gasket × 4
• 91490-25030-00 – Cotter Pin × 1
• 61N-45251-00 – Anode × 1
• 24OP149 – Gear Oil Pump × 1

Installation Guide

1. Preparation: Disconnect the fuel line and tilt the engine to access the lower unit. Gather necessary tools including socket wrenches, screwdrivers, and a torque wrench.
2. Remove Lower Unit: Drain the gear oil completely using the drain screws. Remove the bolts securing the lower unit to the mid-section and carefully separate the lower unit.
3. Water Pump Disassembly: Remove the old water pump housing by unscrewing the mounting bolts. Carefully extract the old impeller, wear plate, cup insert, and seals.
4. Clean Components: Thoroughly clean the water pump cavity and inspect for corrosion or damage. Ensure all mating surfaces are smooth and free of debris.
5. Install New Water Pump Parts: Insert the new key onto the driveshaft, then slide the new impeller (lubricate blades with glycerin or soapy water) onto the shaft with blades facing the correct direction. Install the new wear plate, cup insert, O-ring, and water seal per the service manual.
6. Reassemble Water Pump Housing: Position the new housing over the assembly and secure with the provided bolts, torquing to manufacturer specifications (typically 7–10 ft-lbs).
7. Replace Filters: Locate and remove the old fuel filter and oil filter from the powerhead. Install the new fuel filter (observe flow direction arrows) and spin on the new oil filter hand-tight plus 3/4 turn.
8. Thermostat Replacement: Remove the thermostat cover, extract the old thermostat and gasket, then install the new thermostat (ensure correct orientation) with the new gasket. Reinstall the cover and torque bolts evenly.
9. Anode Installation: Remove the old sacrificial anode from the lower unit and clean the mounting surface. Install the new anode securely to prevent galvanic corrosion.
10. Reinstall Lower Unit: Apply new drain gaskets to both the fill and drain screws. Carefully align the lower unit with the mid-section (ensure the water tube enters the grommet) and secure with bolts, torquing in a cross pattern.
11. Refill Gear Oil: Using the included gear oil pump, fill the lower unit with the manufacturer-recommended gear oil until it overflows from the top vent hole. Install the top screw first, then the bottom drain screw with new gaskets.
12. Final Check: Reconnect the fuel line, lower the engine, and run it in a test tank or on the water. Verify strong water stream from the tell-tale, check for leaks, and confirm smooth operation.

Troubleshooting & FAQ

Q: How do I confirm this maintenance kit fits my engine?
A: Cross-reference your engine model and year with the compatibility table above (F20A/F25A 1998–2009, F25D/F25HP DEHTL/DETL/DMHL 2009–2017). You can also verify using the Yamaha serial number guide or consult your engine's parts diagram for OEM number 6G8-W006A-00.

Q: How often should I perform this maintenance service?
A: Yamaha recommends replacing the water pump impeller every 2–3 years or 200–300 hours of operation, whichever comes first. Filters, thermostats, and anodes should be inspected annually and replaced as needed based on condition.

Q: What are the signs that my water pump or filters need replacement?
A: Weak or absent water flow from the tell-tale, engine overheating, reduced performance, hard starting, or visible impeller damage are common indicators. If your engine is running hot or you notice performance issues, inspect and replace these components immediately.

Q: Can I install this kit myself or do I need a professional?
A: Installation requires moderate mechanical skill and familiarity with outboard lower unit service. If you are comfortable with basic tools and following a service manual, DIY installation is feasible. However, professional installation is recommended if you lack experience to ensure proper torque specs and alignment.

Q: Does this kit include everything needed for a complete service?
A: Yes, this kit includes the water pump rebuild components, fuel and oil filters, thermostat assembly, drain gaskets, anode, and a gear oil pump. You will need to supply the appropriate gear oil 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.