Water Pump Impeller – Fits Yamaha 75-100HP 4-Stroke Outboards (Replaces 67F-44352-00-00)

Water Pump Impeller – Fits Yamaha 75-100HP 4-Stroke Outboards (Replaces 67F-44352-00-00)

This water pump impeller is a direct replacement for those found in Yamaha 75, 80, 90, and 100 HP 4-stroke outboard motors manufactured from 1999 to 2017. It ensures proper engine cooling by delivering a reliable water supply, preventing overheating and potential engine damage.

This component is designed to replace Yamaha parts 67F-44352-00-00 and 67F-44352-01-00, and it also cross-references with several major aftermarket brands, including Sierra, Mallory, and GLM.

• Installation Location: Mounts inside the water pump housing on the lower unit.
• Resilient Material: Constructed from marine-grade neoprene rubber for durability and resistance to wear.
• Blade Count: Features 6 blades for efficient water displacement.

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 x Water Pump Impeller (Replaces 67F-44352-00-00)

Note: This listing is for the impeller only. Associated gaskets and keys are sold separately or as part of a complete water pump service kit.

Installation Guide

Follow these steps for a standard impeller replacement. The process may vary slightly based on your specific outboard model.

1. Safety First: Disconnect the battery and remove the engine kill switch lanyard.
2. Shift to Neutral: Ensure the outboard is in the neutral gear position.
3. Drain Gearcase Oil: Place a drain pan under the lower unit and remove the upper (vent) and lower (drain) screws to drain the gearcase oil.
4. Remove Lower Unit: Loosen and remove the bolts securing the lower unit (gearcase) to the midsection.
5. Access Impeller: Carefully slide the lower unit down and away from the engine to expose the driveshaft and water pump housing.
6. Disassemble Pump Housing: Remove the bolts holding the water pump housing cover in place. Lift the housing to reveal the old impeller.
7. Remove Old Impeller: Slide the old impeller off the driveshaft. You may need to remove a small woodruff key that prevents it from spinning freely.
8. Clean Components: Thoroughly clean the inside of the housing, the wear plate, and the driveshaft.
9. Install New Impeller: Place the woodruff key back into its slot on the driveshaft. Slide the new impeller on, turning the driveshaft clockwise to bend the blades in the correct direction.
10. Reassemble: Reinstall the water pump housing, ensuring gaskets are properly seated. Tighten bolts to the manufacturer's specified torque.
11. Reattach Lower Unit: Guide the lower unit back into place, aligning the driveshaft, shift shaft, and water tube. Reinstall and tighten the mounting bolts.
12. Final Steps: Refill the gearcase with fresh oil until it seeps from the vent hole. Reinstall both screws and test the engine using a water source (flusher or in water).

Troubleshooting & FAQ

How do I confirm this fits my engine?
The best method is to match your engine's model and year to the "Compatible Engine Models" chart above. You can also verify by cross-referencing your existing part number with our "Part Number Cross-Reference" table. For extra certainty, use the official Yamaha guides linked above to check diagrams for your specific serial number.

How often should I replace the water pump impeller?
As a preventative maintenance item, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. Frequency may increase if you operate in sandy, silty, or saltwater conditions.

What are the signs of a failing impeller?
Common symptoms include the engine running hotter than normal, a weak or non-existent water stream from the "tell-tale" outlet port, and, in severe cases, an engine overheat alarm. A brittle, cracked, or worn-down impeller should be replaced immediately.

OEM vs. Aftermarket?
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.