6CJ-44315-00 Water Pump Impeller Gasket for Yamaha F70LA | JLM Marine

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

This aftermarket water pump impeller gasket is precision-engineered for Yamaha 70HP 4-stroke outboard engines, specifically the F70LA series from 2006 and later. Designed to match OEM specifications, it ensures a reliable seal between critical water pump components, maintaining optimal cooling system performance.

This gasket directly replaces Yamaha OEM part number 6CJ-44315-00, providing a cost-effective solution for routine maintenance or water pump rebuilds. Compatible with multiple F70LA engine variants, it integrates seamlessly into your existing cooling system.

• Direct replacement for Yamaha OEM 6CJ-44315-00
• Essential component for water pump service and repair kit assemblies
• Precision-cut for proper fitment and leak-free operation

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:

• 1 × Water Pump Impeller Gasket (Yamaha 6CJ-44315-00)

Installation Guide

1. Preparation: Disconnect the battery and allow the engine to cool completely. Gather necessary tools including screwdrivers, wrenches, and a clean workspace.
2. Access the Water Pump: Remove the lower unit or water pump housing according to your engine's service manual. Keep all fasteners organized for reassembly.
3. Remove Old Components: Carefully extract the old impeller and gasket from the pump housing. Inspect all surfaces for corrosion, scoring, or debris.
4. Clean Mating Surfaces: Thoroughly clean both gasket surfaces on the pump housing and cover plate using a gasket scraper and solvent. Ensure no old gasket material or sealant remains.
5. Position New Gasket: Place the new impeller gasket onto the pump housing, aligning all bolt holes precisely. Do not use additional sealant unless specified by the manufacturer.
6. Install Impeller: If replacing the impeller simultaneously, lubricate it with glycerin or soapy water and insert with blades oriented correctly per the service manual.
7. Reassemble Housing: Carefully position the pump cover plate over the gasket and impeller. Thread bolts by hand first to prevent cross-threading.
8. Torque Fasteners: Tighten all bolts in a cross-pattern to the manufacturer's specified torque settings. This ensures even gasket compression and prevents leaks.
9. Reinstall Lower Unit: Reattach the lower unit or pump assembly, ensuring all alignment pins and seals are properly seated.
10. Test for Leaks: Reconnect the battery and run the engine with a water supply (flushing attachment or in-water test). Monitor for coolant leaks around the gasket area.
11. Final Inspection: Check that water is discharging properly from the telltale indicator. Verify no abnormal sounds or overheating occurs during the test run.

Troubleshooting & FAQ

Q: How do I confirm this gasket fits my F70LA engine?
A: Cross-reference your engine's model and serial number with the compatibility table above. The gasket fits F70LA variants from 2006 onward, including models 0112 through 0411. Verify your part number matches 6CJ-44315-00 using Yamaha's parts diagrams.

Q: Can I reuse the old gasket during water pump service?
A: No, gaskets are single-use components. Once compressed, they lose their ability to seal properly. Always install a new gasket when servicing the water pump to prevent coolant leaks and maintain engine cooling efficiency.

Q: How often should I replace this gasket?
A: Replace the impeller gasket whenever you service the water pump impeller, typically every 2–3 years or 200–300 hours of operation. Also replace it any time the pump housing is disassembled for inspection or repair.

Q: What are the signs that my water pump gasket is failing?
A: Common symptoms include coolant leaking from the lower unit, reduced water flow from the telltale indicator, engine overheating, or visible corrosion around the pump housing. Address these issues immediately to prevent engine damage.

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.