66T-W006A-00 Water Pump Repair Kit for Yamaha F25 FT25 T25 F30 | JLM Marine

Water Pump Repair Kit – Fits Yamaha F25 FT25 T25 F30 Outboards

This comprehensive water pump repair kit is engineered for Yamaha 4-stroke outboard engines, including F25HP, FT25B High Thrust, T25F, and F30A models spanning 2001–2024. It ensures reliable cooling system performance and extends engine life by delivering OEM-equivalent specifications at an aftermarket value.

Direct replacement for OEM part number 66T-W006A-00, this kit consolidates all essential cooling, filtration, and maintenance components into one package, simplifying scheduled service and eliminating the need for multiple orders.

• Includes 17 critical components: impeller, wear plate, thermostat, fuel filter, oil filter, anode, gaskets, and more
• Complete service solution for water pump rebuild and routine maintenance intervals
• Designed for 4-stroke Yamaha outboards ranging from 25HP to 40HP

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 kit includes all necessary components for a complete water pump rebuild and routine service:

• 6H4-44352-00 Impeller × 1
• 66T-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-24560-10 Fuel Filter × 1
• 5GH-13440-60 Oil Filter × 1
• 6G8-12411-00 Thermostat × 1
• 62Y-12414-00 Gasket × 1
• 90430-08020 Drain Gasket × 4
• 91490-30025 Cotter Pin × 1
• 67C-45251-00 Anode × 1
• 24OP149 Gear Oil Pump × 1

Installation Guide

1. Disconnect the fuel line and remove the lower unit from the outboard motor following your engine's service manual.
2. Remove the old water pump housing cover by unscrewing the mounting bolts. Inspect and discard the old impeller and wear plate.
3. Clean all mating surfaces thoroughly to remove old gasket material, corrosion, and debris.
4. Install the new wear plate (66T-44323-00) into the pump housing, ensuring proper alignment with dowel pins.
5. Lubricate the new impeller (6H4-44352-00) with glycerin or soapy water, then carefully insert it into the housing with blades oriented in the correct rotation direction.
6. Insert the key (90280-03024) into the driveshaft slot, then slide the insert cup (63D-44322-00) over the impeller hub.
7. Position the new gasket (63D-44316-00) on the pump housing and install the cover (63D-44312-00) with the grommet (663-44366-00) in place.
8. Secure the cover using the four new bolts (90119-08M15), tightening them in a cross pattern to the manufacturer's torque specification.
9. Replace the thermostat (6G8-12411-00) and its gasket (62Y-12414-00) in the powerhead cooling passage.
10. Install the new fuel filter (61N-24560-10), oil filter (5GH-13440-60), and anode (67C-45251-00) in their respective locations.
11. Reinstall the lower unit, ensuring the driveshaft engages properly with the impeller. Replace drain gaskets (90430-08020) and secure with the cotter pin (91490-30025).
12. Reconnect the fuel line, perform a freshwater flush test, and verify water flow from the tell-tale indicator before launching.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Yamaha engine?
A: Cross-reference your engine's model and year with the compatibility table above. Verify the original part number (66T-W006A-00) matches your engine's service manual or existing component. If your model year falls within 2001–2024 for F25/FT25B/T25F/F30A series, this kit is the correct fitment.

Q: How often should I replace the water pump impeller and these components?
A: Yamaha recommends inspecting the water pump impeller every 100 hours of operation or annually, whichever comes first. Replace the impeller if you notice cracked blades, missing vanes, or reduced cooling performance. Filters, thermostats, and anodes should be serviced according to your engine's maintenance schedule—typically every 100–200 hours.

Q: What are the signs that my water pump needs immediate replacement?
A: Watch for reduced or no water flow from the tell-tale indicator, engine overheating alarms, steam from the powerhead, or loss of engine power. If you experience any of these symptoms, shut down the engine immediately and inspect the cooling system to prevent catastrophic damage.

Q: Does this kit include everything I need for a complete service, or do I need to order additional parts?
A: This kit contains 17 essential components covering the water pump rebuild, fuel filter, oil filter, thermostat, anode, and gear oil pump. For a full service, you may also need engine oil, gear oil, spark plugs, and a lower unit seal kit depending on your maintenance interval—consult your engine's service manual.

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.