Outboard Water Pump Impeller – Fits Yamaha F4 F6 2-Stroke & 4-Stroke Outboards
This high-quality aftermarket water pump impeller is engineered to fit Yamaha 4-stroke outboards (F4 1984 & UP, F6 2006 & UP) and 2-stroke models (4 hp 1984–1999, 5 hp 1984–2002). Designed to deliver reliable cooling performance, it ensures optimal engine temperature regulation and protects against overheating in all marine conditions.
This impeller directly replaces Yamaha OEM part numbers 6E0-44352-00, 6E0-44352-01, and 6E0-44352-03, as well as aftermarket equivalents from CEF Marine, Sierra Marine, and Mallory Marine. Built to OEM specifications with durable rubber construction, it provides dependable service life at a competitive price.
- Precision-molded 6-blade design for efficient water flow and cooling
- Compatible with both 2-stroke and 4-stroke Yamaha small outboards
- Direct fit replacement – no modifications required
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands:
| Brand |
Part Number |
| Yamaha |
6E0-44352, 6E0-44352-00, 6E0-44352-01, 6E0-44352-03 |
| CEF Marine |
500325 |
| Sierra Marine |
18-3073 |
| Mallory Marine |
9-45611 |
| Aftermarket |
47-96305M |
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.
| Brand |
Model |
Rated HP |
Stroke |
Years |
| Yamaha |
F4 |
4 hp |
4-Stroke |
1984 & UP |
| Yamaha |
F6 |
6 hp |
4-Stroke |
2006 & UP |
| Yamaha |
— |
4 hp |
2-Stroke |
1984–1999 |
| Yamaha |
— |
5 hp |
2-Stroke |
1984–2002 |
Technical Specifications
| Specification |
Value |
| Number of Blades |
6 |
| Impeller Height |
12.6 mm / 0.50 inch |
| Overall Diameter |
40.0 mm / 1.57 inch |
| Hub Shaft Diameter |
11.0 mm / 0.43 inch |
| Net Weight |
0.35 oz |
| Material |
Rubber |
Package Contents
Your order includes:
- 1 × Outboard Water Pump Impeller
Installation Guide
-
Disconnect the fuel line and remove the lower unit from the outboard motor according to your service manual.
-
Locate the water pump housing on the lower unit. Remove the retaining screws and carefully separate the housing.
-
Remove the old impeller from the shaft. Inspect the housing and plate for wear, debris, or scoring.
-
Clean all mating surfaces thoroughly. Replace the pump housing and faceplate if damaged.
-
Lubricate the new impeller blades with a water-resistant grease or glycerin to ease installation and prevent tearing.
-
Install the new impeller onto the drive shaft, ensuring the blades face the correct rotation direction (check your service manual).
-
Reassemble the water pump housing, torquing fasteners to manufacturer specifications.
-
Reinstall the lower unit onto the motor, ensuring proper alignment and secure attachment.
-
Reconnect the fuel line and run the engine in a test tank or on-water to confirm proper water flow from the telltale.
-
Check for leaks around the pump housing and lower unit seals. Re-torque fasteners if necessary.
Troubleshooting & FAQ
Q: How do I confirm this impeller fits my Yamaha outboard?
A: Cross-reference your engine model and year with the compatibility table above. You can also check your original impeller dimensions (diameter, height, blade count) against our specifications, or verify the OEM part number on your current impeller matches one of the listed cross-references.
Q: How often should I replace my water pump impeller?
A: Yamaha recommends replacing the impeller every 2–3 years or 200–300 hours of operation, whichever comes first. If you frequently operate in sandy, shallow, or debris-filled water, inspect and replace it annually.
Q: What are the signs of a failing impeller?
A: Common symptoms include weak or no water stream from the telltale (pee hole), engine overheating, steam from the powerhead, or reduced performance. If you notice any of these, inspect the impeller immediately to prevent severe engine damage.
Q: Will this aftermarket impeller perform as well as the OEM Yamaha part?
A: Yes. This impeller is manufactured to OEM specifications using high-grade rubber compound in an ISO9002-certified facility. It provides comparable durability and cooling performance at a more competitive price point.
Q: Can I install this impeller myself, or do I need a mechanic?
A: If you have basic mechanical skills and the proper tools, you can replace the impeller yourself following a service manual. However, professional installation is recommended to ensure correct assembly, torque specs, and to avoid damaging seals or the pump housing.
Q: Is this an OEM part or 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.