Water Pump Impeller Repair Kit – Fits Yamaha 60-90 HP 2-Stroke (Replaces 692-W0078-00-00, 692-W0078-02-00)

Water Pump Impeller Repair Kit – Fits Yamaha 60-90 HP 2-Stroke

This complete water pump impeller repair kit provides everything needed to restore your cooling system. It is designed for Yamaha 2-Stroke outboards from 60 HP to 90 HP (1984–2009), including C75, E75, P75, C80, C85, B90, and C90 models.

This aftermarket kit is a direct replacement for Yamaha part numbers 692-W0078-00-00, 692-W0078-01-00, 692-W0078-02-00, and 692-W0078-A0-00, as well as Sierra part numbers 18-3370 and 18-3371.

• Installation Type: Direct OEM-spec replacement.
• Complete Kit: Includes a new impeller, housing insert, wear plate, gaskets, fasteners, and O-rings.
• Durable Impeller: Features a 6-fin neoprene rubber impeller with a corrosion-resistant brass hub for reliable performance.

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 x Impeller (688-44352-03)
• 1 x Woodruff Key (90280-04M04)
• 1 x Cartridge Insert (688-44322-00)
• 1 x Outer Plate (688-44323-00)
• 1 x Water Pump Gasket (688-44315-A0)
• 1 x Cartridge Gasket (688-44324-A0)
• 1 x Water Pump Gasket (688-44316-A0)
• 1 x O-Ring (93210-46044)
• 2 x Bolt with Washer (90119-08M13)
• 2 x Bolt with Washer (90119-08M16)

Installation Guide

Regular maintenance of your water pump is critical for engine health. Professional installation is recommended.

1. Safety First: Disconnect the battery and work in a well-ventilated area.
2. Drain Lower Unit: Remove the lower and upper drain screws and drain the gear lube into a suitable container.
3. Remove Lower Unit: Loosen and remove the bolts securing the lower unit (gearcase) to the engine. Carefully lower it away from the midsection.
4. Access Water Pump: Remove the bolts on the water pump housing and slide the housing up and off the drive shaft.
5. Replace Components: Remove the old impeller, Woodruff key, wear plate, and gaskets. Note their orientation.
6. Clean Surfaces: Thoroughly clean the mating surfaces to ensure a good seal with the new gaskets.
7. Install New Parts: Install the new gasket, wear plate, and cartridge insert. Slide the Woodruff key into its slot on the drive shaft.
8. Install Impeller: Align the new impeller with the keyway and slide it down. Rotate the drive shaft clockwise to help flex the fins into the housing.
9. Reassemble: Reinstall the housing with the new gasket and tighten the bolts to the manufacturer's specified torque.
10. Reattach Lower Unit: Carefully guide the lower unit back into place, ensuring the drive shaft, shift shaft, and water tube are properly aligned. Secure it with the bolts.
11. Refill Gear Lube: Use a pump to fill the lower unit with fresh gearcase lube from the bottom drain hole until it seeps out the top one. Reinstall both drain screws with new washers.
12. Test Operation: Securely attach a water supply ("earmuffs") or test in the water. Start the engine and confirm a steady stream of water from the "telltale" outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit will fit my Yamaha engine?

A: The best method is to match your engine's model and year to our detailed "Compatible Engine Models" list. You can also verify your existing part number against our "Part Number Cross-Reference" table, which includes Yamaha and other aftermarket numbers this kit replaces.

Q: How often should I replace my water pump impeller?

A: For preventative maintenance, it is recommended to inspect and likely replace the impeller every 1 to 2 years or every 100-200 hours of operation, whichever comes first. This interval can be shorter if you frequently operate in sandy, silty, or saltwater environments.

Q: What are the signs of a failing water pump?

A: The most common signs include the engine overheating at idle or low speeds, and a weak or non-existent stream of water from the tell-tale outlet port. If you notice either of these, shut down the engine immediately to prevent severe 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.