Sierra 18-3433 Water Pump Kit Without Housing, Replaces Yamaha 63V-W0078-01-00, Fits 9.9/15 HP (1996-04) & F15 (1998-04)

The Sierra 18-3433 Water Pump Kit is a direct-fit replacement water pump kit for Yamaha outboard engines, supplied without the pump housing. It is built for boat owners and marine technicians who need to restore proper cooling water flow to the engine without replacing a housing that is already in good condition. The kit's impeller compound is formulated based on the size and application of this specific pump, and the remaining kit components are constructed to meet or exceed original equipment specifications. This kit is functionally the same as the Sierra 18-3412 kit, with the difference being that 18-3433 omits the housing, making it the correct choice when the existing housing is being reused or sourced separately.

The kit includes the mounting bolt (O.E. 97095-08045-00, qty 4) needed to complete the water pump service, along with the additional gasket and seal components required for a proper installation. It is designed as a maintenance and repair part for Yamaha outboard engines within the stated fitment range, restoring the water pump function that circulates cooling water through the engine.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3433
• Product Type: Water Pump Kit
• Housing: Without Housing
• OEM Cross Reference: 63V-W0078-01-00
• Fitment: Yamaha 9.9/15 HP (1996-04); Yamaha F15 (1998-04)
• Included Components: Bolt, O.E. 97095-08045-00, Qty 4
• Weight: 0.37 pounds
• UPC: 808282185671

Fitment

• Yamaha 9.9/15 HP outboards, 1996-04
• Yamaha F15 outboards, 1998-04

Replaces (OEM)

• 63V-W0078-01-00

Frequently Asked Questions

What engines does the Sierra 18-3433 water pump kit fit? The 18-3433 kit fits Yamaha 9.9/15 HP outboards from 1996-04 and Yamaha F15 outboards from 1998-04.

Does the 18-3433 kit include the pump housing? No, Sierra 18-3433 is supplied without housing, so it is intended for installations where the existing housing is reused or sourced as a separate part.

What OEM part number does 18-3433 replace? Sierra 18-3433 replaces Yamaha OEM number 63V-W0078-01-00.

How much does the 18-3433 water pump kit weigh? The kit weighs 0.37 pounds.

What is included in the Sierra 18-3433 kit? The kit includes a mounting bolt (O.E. 97095-08045-00, qty 4) along with the other components needed to service the water pump, aside from the housing.

What is the difference between Sierra 18-3433 and 18-3412? 18-3433 and 18-3412 are the same water pump kit, except 18-3433 does not include the pump housing while 18-3412 does.

Is the Sierra 18-3433 kit a genuine Yamaha part or an aftermarket replacement? The 18-3433 is a Sierra-brand aftermarket kit built to replace Yamaha OEM part 63V-W0078-01-00, not a Yamaha-branded part.

Will 18-3433 work if my boat's water pump housing is still good? Yes, since Sierra 18-3433 is sold without housing, it is well suited to a rebuild where the existing housing does not need to be replaced.

Is the Sierra 18-3433 impeller sized specifically for this application? Yes, the impeller compound in the 18-3433 kit is formulated based on the size and application of this specific Yamaha water pump.

What is the UPC for the Sierra 18-3433 water pump kit? The UPC for Sierra 18-3433 is 808282185671.