Water Pump Repair Kit – Fits Yamaha F300/F350 V8 Outboards (Replaces 6AW-W0078-00-00)

Water Pump Repair Kit – Fits Yamaha F300/F350 V8 Outboards

This water pump repair kit is designed for Yamaha F300 and F350 V8 4-stroke outboard engines from 2007 through 2016 and newer. It contains a comprehensive set of OEM-grade components required for a complete water pump assembly rebuild, ensuring reliability and performance.

This kit is a direct replacement for Yamaha part number 6AW-W0078-00-00.

• Installation Type: Direct OEM Replacement
• Compatible Engines: Yamaha F300/F350 V8 (2007-2016+)
• Included Components: Impellers, gaskets, o-rings, and all necessary hardware.

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

• 1 x Gasket, Water Pump (6AW-44315-00-00)
• 1 x Insert, Cartridge (6AW-44322-00-00)
• 1 x Outer Plate, Cartridge (6AW-44323-00-00)
• 1 x Key (6AW-44336-00-00)
• 2 x Impeller (6AW-44352-00-00)
• 4 x Bolt, With Washer (90119-08M14-00)
• 2 x O-Ring (93210-37M67-00)
• 1 x O-Ring (93210-94003-00)
• 2 x Pin, Dowel (93606-12019-00)

Installation Guide

1. Disconnect the battery and remove the engine cover.
2. Remove the lower unit bolts and detach the lower unit from the engine.
3. Locate and unbolt the water pump housing to access the old components.
4. Remove the old impeller, gaskets, wear plate, and any other parts included in the kit.
5. Thoroughly clean all housing surfaces and inspect for damage or corrosion.
6. Install the new gasket, wear plate, and cartridge components from the kit.
7. Slide the new impeller onto the driveshaft, ensuring the key is properly aligned.
8. Reinstall the water pump housing and torque the bolts to manufacturer specifications.
9. Reattach the lower unit to the engine, ensuring the driveshaft and water tube align correctly.
10. Reconnect the battery and test the engine using a water supply to confirm proper pump operation.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my engine?
A: Check your engine's model and year against the "Compatible Engine Models" table above. This kit is a direct replacement for OEM part number 6AW-W0078-00-00. You can also use the Yamaha serial number guide linked above to verify your model details.

Q: What are the common signs of a failing water pump?
A: Common signs include the engine overheating at idle or low speeds, a weak or inconsistent water stream from the tell-tale port, or a high engine temperature alarm.

Q: How often should the water pump impeller be replaced?
A: For preventative maintenance, it is recommended to inspect the impeller annually and replace it at least every two years or 200 hours of use, whichever comes first, especially if operating in saltwater or sandy conditions.

Q: Is this an original Yamaha OEM part?
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.