655-44352 Water Pump Impeller for Yamaha 6HP 8HP | JLM Marine

Water Pump Impeller – Fits Yamaha 2-Stroke 6HP & 8HP Outboards

This aftermarket water pump impeller is designed to fit Yamaha 2-stroke outboard engines rated at 6HP and 8HP. It provides reliable cooling system performance for select short and long shaft models within specific serial number ranges, ensuring compatibility with 6A and 8A (P165) series engines.

Direct replacement for OEM part numbers 655-44352 and 655-44352-09, offering a dependable solution for maintaining optimal engine temperature and preventing overheating.

• Package includes one complete outboard impeller
• Suitable for both short shaft and long shaft configurations
• Precise fitment for specific serial number ranges

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:

• One (1) Outboard Impeller

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit.
2. Drain the lower unit oil by removing the drain and vent plugs; catch the fluid in an appropriate container.
3. Remove the water pump housing bolts and carefully separate the housing from the lower unit.
4. Extract the old impeller by gently prying it from the impeller shaft; note the direction of the blade curvature.
5. Inspect the impeller housing and wear plate for scoring, cracks, or debris; clean thoroughly.
6. Lubricate the new impeller blades with a water-resistant grease or soapy water to ease installation.
7. Install the new impeller onto the shaft, ensuring the blades curve in the same direction as the original.
8. Align the impeller key with the slot on the shaft and press it fully into place.
9. Reassemble the water pump housing, ensuring all gaskets are properly seated and aligned.
10. Torque the housing bolts to manufacturer specifications in a cross pattern to ensure even seating.
11. Refill the lower unit with fresh gear oil and reinstall the drain and vent plugs.
12. Reconnect the fuel line and cowling, then test the cooling system by running the engine in a test tank or on-water.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Yamaha engine?
A: Check your engine's model plate for the HP rating, stroke type, and serial number. Compare it to the compatibility table above; this impeller fits Yamaha 2-stroke 6HP (6A up to serial 00600 short shaft, 30300 long shaft) and 8HP (P165-8A up to serial 20160 short shaft, 54715 long shaft).

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend replacing the impeller every 2–3 years or 200–300 operating hours, whichever comes first. If you notice overheating, reduced water flow from the tell-tale, or visible cracking/missing blades, replace it immediately.

Q: What are the signs of a failing impeller?
A: Common symptoms include engine overheating, weak or no water stream from the tell-tale (pee hole), steam from the cowling, or an alarm/warning light. Inspect the impeller if any of these occur.

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 the installation guide. However, professional installation is recommended to ensure correct torque settings and seal integrity.

Q: Is this an OEM or aftermarket impeller?
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.