689-44324-A0 Water Pump Impeller Gasket for Yamaha Mariner 20HP 25HP 30HP | JLM Marine

Water Pump Impeller Gasket for Yamaha Mariner 20HP 25HP 30HP | JLM Marine

This water pump impeller gasket is engineered for Yamaha 2-stroke 25-30 HP and Mariner 20-30 HP outboard engines. It ensures a proper seal between the water pump components, preventing leaks and maintaining optimal cooling performance for your marine engine.

Direct Replacement For: Yamaha 689-44324-A0, 689-44324-A0-00

• OEM-spec gasket for reliable water pump sealing
• Fits multiple Yamaha and Mariner outboard models from 1984-1985 and later
• Essential component for water pump maintenance and rebuild

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

• 1 × Impeller Gasket (Replaces 689-44324-A0, 689-44324-A0-00)

Installation Guide

1. Disconnect the battery and remove the lower unit from the outboard motor following your engine's service manual.
2. Remove the water pump housing and carefully extract the old impeller and gasket.
3. Clean all mating surfaces thoroughly, removing old gasket material and debris. Inspect for damage or corrosion.
4. Place the new impeller gasket onto the pump housing, ensuring proper alignment with all bolt holes.
5. Install the impeller, ensuring the blades are oriented correctly according to your service manual. Apply marine grease to the impeller for initial lubrication.
6. Install the pump housing and torque bolts to manufacturer specifications in a criss-cross pattern.
7. Reinstall the lower unit, ensuring proper alignment of the driveshaft and water tube.
8. Reconnect the battery and perform a water pump function test before launching.

Troubleshooting & FAQ

Q: How do I confirm this gasket fits my specific Yamaha or Mariner engine?
A: Cross-reference your engine's model number, horsepower, and year with the compatibility table above. For Yamaha 2-stroke 25-30 HP engines from 1984-1985 or Mariner 20C, 25C, and 30A models with the specified serial number prefixes, this gasket is the correct fit. Always verify the OEM part number 689-44324-A0 matches your current gasket.

Q: How often should I replace the water pump impeller gasket?
A: Replace the gasket every time you service or replace the water pump impeller, typically every 2-3 years or 200-300 operating hours. Never reuse an old gasket, as it may not seal properly and can cause cooling system leaks.

Q: What are the signs that my water pump gasket is failing?
A: Common symptoms include water leaking from the lower unit, engine overheating, weak or no water stream from the tell-tale indicator, or visible coolant around the pump housing. If you notice any of these signs, inspect and replace the gasket immediately.

Q: Can I install this gasket without removing the entire lower unit?
A: No, proper water pump service requires complete lower unit removal to access the pump housing and gasket. Attempting shortcuts may result in improper installation and cooling system failure.

Q: Is this an OEM Yamaha gasket or an aftermarket replacement?
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.