Water Pump Impeller Repair Kit for Yamaha 60–90 HP 2-Stroke Outboards – Replaces 692-W0078-00-00 and 692-W0078-02-00

Product Details

This complete water pump impeller repair kit is designed to service the cooling system on selected Yamaha 2-stroke outboards from 60 HP to 90 HP. The listed coverage includes model years from 1984 through 2009 and models such as C75, E75, P75, C80, C85, B90, and C90. Always compare your original part number and specific engine model before ordering.

The kit replaces or interchanges with Yamaha part numbers 692-W0078-00-00, 692-W0078-01-00, 692-W0078-02-00, and 692-W0078-A0-00. It also cross-references Sierra parts 18-3370 and 18-3371.

• Designed as a direct replacement for the listed water pump components.
• Includes a 6-fin neoprene rubber impeller with a brass or metal hub.
• Includes gaskets, plates, cartridge components, O-ring, key, and listed fasteners for a complete water pump service.

Part Number Matrix

Use the following matrix to compare the listed OEM and aftermarket reference numbers.

Engine & Model Compatibility

Review the model and year information below, then confirm the exact model designation, serial range, and original water pump part number before installation.

Technical Specs

Product Type

Water pump impeller repair kit

Installation

Direct replacement for the listed applications

Housing Material

Plastic housing with metal components

Housing Color

Black and natural

Impeller Dimensions

Approximately 2⅝ inches diameter × 1⅞ inches depth (67 mm × 48 mm)

Impeller Construction

6-fin neoprene rubber impeller with brass or metal hub

What’s in the Box

• 1 × Impeller — 688-44352-03
• 1 × Woodruff key — 90280-04M04
• 1 × Cartridge insert — 688-44322-00
• 1 × Outer plate — 688-44323-00
• 1 × Water pump gasket — 688-44315-A0
• 1 × Cartridge gasket — 688-44324-A0
• 1 × Water pump gasket — 688-44316-A0
• 1 × O-ring — 93210-46044
• 2 × Bolt with washer — 90119-08M13
• 2 × Bolt with washer — 90119-08M16

Installation Notes

1. Disconnect the spark plug leads and battery before servicing the outboard.
2. Shift the outboard into neutral and remove the lower-unit mounting bolts.
3. Carefully lower and separate the gearcase from the upper housing.
4. Remove the water pump cover to access the existing impeller.
5. Note the rotational direction of the old impeller fins, then remove the impeller and Woodruff key from the driveshaft.
6. Clean all gasket surfaces and remove old sealant, debris, and gasket material.
7. Install the replacement gaskets, wear plate, and cartridge insert.
8. Install the Woodruff key, slide the new impeller onto the shaft, and turn the shaft clockwise as needed to seat the fins correctly in the housing.
9. Reinstall the water pump housing and tighten the fasteners to the manufacturer’s specified torque.
10. Reattach the lower unit, ensuring proper alignment of the driveshaft and water tube.
11. Reconnect the battery and test the engine in water. Confirm a strong, steady stream from the tell-tale outlet.

Troubleshooting & FAQ

Safety & Important Information

• Verify the original part number, engine model, year, and serial information before purchase.
• Compare the replacement components with your original parts before installation.
• This is an aftermarket replacement kit, not a genuine OEM component.
• Professional installation is recommended when you are not familiar with outboard lower-unit or water-pump service.
• After installation, test the cooling-water discharge and monitor the engine for proper cooling before normal operation.

About Sea Sierra

• Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world conditions.
• Global Fulfillment — Shipping options and delivery estimates are provided according to destination at checkout.
• Manufacturer-Direct Value — Fair pricing with attention to product materials and quality control.