6CJ-44316-00 Water Pump Impeller Gasket for Yamaha F70LA | JLM Marine

Water Pump Impeller Gasket – Fits Yamaha F70LA 70HP 4-Stroke Outboard

This high-quality water pump impeller gasket is engineered to fit Yamaha F70LA 70HP 4-stroke outboard engines from 2006 and later. Designed as a direct replacement for OEM part number 6CJ-44316-00, this gasket ensures a reliable seal within your water pump assembly, preventing leaks and maintaining optimal cooling system performance.

Whether you're performing routine maintenance or a complete water pump rebuild, this gasket provides the precise fit and durability needed to keep your Yamaha outboard running smoothly. Compatible with multiple F70LA engine variants and repair kit applications.

• Direct replacement for Yamaha OEM part number 6CJ-44316-00
• Designed for 70HP 4-stroke Yamaha outboards
• Essential component for water pump repair and 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

Your purchase includes:

• 8 × Gasket (6CJ-44316-00)

Installation Guide

1. Preparation: Disconnect the battery and flush the cooling system. Gather necessary tools including screwdrivers, wrenches, and a gasket scraper.
2. Remove the Lower Unit: Detach the lower unit from the outboard following your engine's service manual procedures.
3. Access the Water Pump: Remove the water pump housing bolts and carefully separate the housing to expose the impeller and gasket.
4. Remove Old Gasket: Carefully scrape away the old gasket material from both mating surfaces using a gasket scraper. Ensure all residue is completely removed.
5. Clean Surfaces: Wipe both surfaces clean with a lint-free cloth and a suitable solvent to remove any oil or debris.
6. Position New Gasket: Place the new impeller gasket onto the clean surface, ensuring proper alignment with all bolt holes and passages.
7. Reassemble Water Pump: Reinstall the impeller (replace if worn) and position the pump housing over the new gasket.
8. Torque Fasteners: Tighten all housing bolts to the manufacturer's specified torque in a crisscross pattern to ensure even pressure.
9. Reinstall Lower Unit: Carefully reattach the lower unit to the outboard, ensuring proper alignment of the drive shaft.
10. Reconnect and Test: Reconnect the battery and run the engine with a flushing attachment or in a test tank. Check for leaks around the gasket area.
11. Final Inspection: Monitor the cooling system for proper water flow and verify there are no leaks during the first few minutes of operation.

Troubleshooting & FAQ

How do I confirm this gasket fits my Yamaha F70LA engine?
Verify your engine model number and year against the compatibility table above. Check your engine's serial number plate or consult the Yamaha serial number guide linked in the compatibility section to ensure your F70LA variant is listed.

How often should I replace the water pump impeller gasket?
Replace the gasket every time you service or rebuild the water pump assembly, typically every 2-3 years or 200-300 hours of operation. Always use a new gasket when replacing the impeller to maintain a proper seal.

What are signs that my water pump gasket is failing?
Common symptoms include visible water leaks around the pump housing, overheating engine, reduced tell-tale water flow, or corrosion around the pump area. If you notice any of these signs, inspect and replace the gasket immediately.

Why does this package include 8 gaskets?
This bulk package provides multiple gaskets for future maintenance or for marine mechanics servicing multiple engines. Having spares on hand ensures you're prepared for regular water pump service intervals.

Can I reuse the old gasket if it looks undamaged?
No, gaskets are designed for single use only. Even if the old gasket appears intact, it has been compressed and may not seal properly upon reinstallation, leading to leaks and potential engine damage.

What's the difference between OEM and aftermarket gaskets?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.