Sierra 18-3395 Water Pump Kit Without Housing - Replaces Yamaha 61A-W0078-01-00

The Sierra 18-3395 Water Pump Kit is a complete rebuild kit for outboard water pumps, supplied without the pump housing itself. It is built to restore proper cooling flow when an impeller and its related wear components have worn down, cracked, or hardened with age. The kit brings together every small part typically consumed during a water pump service into a single purchase, so the job can be done in one pass rather than sourcing individual pieces separately.

Inside the kit you will find the 18-0244 water pump gasket, four 18-0256 bolts, the 18-3071 impeller, the 18-3302 impeller key, the 18-3333 insert cup, the 18-3345 wear plate, and two O-rings (18-7483 and 18-7485). Because the housing is not included, this kit is intended for applications where the existing housing is still in good condition and only the internal wear components need replacing.

The Sierra 18-3395 directly replaces the Yamaha 61A-W0078-01-00 water pump kit. Sierra manufactures this kit to meet or exceed the performance of the original equipment part it replaces, and it is backed by Sierra's standard product warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3395
• Kit Type: Water Pump Kit, Without Housing
• Weight: 0.91 pounds
• UPC: 030999753625
• Housing Included: No
• Kit Contents: 18-0244 Water Pump Gasket, 18-0256 Bolt (Qty 4), 18-3071 Impeller, 18-3302 Impeller Key, 18-3333 Insert Cup, 18-3345 Wear Plate, 18-7483 O-Ring, 18-7485 O-Ring
• OEM Cross Reference: 61A-W0078-01-00

Fitment

Replaces the Yamaha water pump kit 61A-W0078-01-00.

Replaces (OEM)

• 61A-W0078-01-00

Frequently Asked Questions

What does the Sierra 18-3395 water pump kit include? The kit contains the 18-0244 water pump gasket, four 18-0256 bolts, the 18-3071 impeller, the 18-3302 impeller key, the 18-3333 insert cup, the 18-3345 wear plate, and two O-rings (18-7483 and 18-7485).

Does the 18-3395 kit come with a water pump housing? No, the 18-3395 kit does not include a housing. It is designed for rebuilds where the existing water pump housing is reused and only the internal wear components are replaced.

What OEM part number does the Sierra 18-3395 replace? The 18-3395 kit replaces Yamaha OEM part number 61A-W0078-01-00.

Is there a version of this kit that includes the housing? Sierra offers a companion kit with the housing included under a different part number; the 18-3395 is specifically the version without the housing, so confirm which configuration your pump needs before ordering.

How much does the 18-3395 water pump kit weigh? The Sierra 18-3395 water pump kit weighs 0.91 pounds.

Is the Sierra 18-3395 a genuine Yamaha part or an aftermarket equivalent? The 18-3395 is a Sierra-manufactured aftermarket kit engineered to meet or exceed the specifications of the original Yamaha 61A-W0078-01-00 kit it replaces.

What is the impeller key used for in the 18-3395 kit? The 18-3302 impeller key included in the kit locks the impeller to the water pump drive shaft so it rotates with the shaft rather than slipping during operation.

Do I need both O-rings included in the 18-3395 kit for installation? Yes, both the 18-7483 and 18-7485 O-rings included in the 18-3395 kit are used during reassembly to seal the water pump components.

What is the wear plate for in this water pump kit? The 18-3345 wear plate included in the 18-3395 kit provides a renewed, flat surface for the impeller to run against, since the original plate can groove or wear over time.

How many bolts come in the Sierra 18-3395 kit? Four 18-0256 bolts are included in the 18-3395 kit.

Is the gasket included in the 18-3395 kit specific to this pump? Yes, the included 18-0244 water pump gasket corresponds to OEM number 6E5-44315-A0-00 and is matched to this water pump kit.