Sierra 18-3396-1 Water Pump Kit with Housing for Yamaha Outboards, Replaces 61A-W0078-A2-00

The Sierra 18-3396-1 Water Pump Kit with Housing is a complete cooling system rebuild kit for Yamaha Outboards. Unlike a basic impeller-only kit, this version includes the full water pump housing along with every wear component needed to restore proper cooling flow in one job, so you are not left tracking down a housing separately when the old one is cracked, corroded, or worn out of spec.

The kit contains the water pump housing, impeller, wear plate, impeller key, insert cup, water pump gasket, four mounting bolts, and two O-rings, giving you a full set of new sealing and wear surfaces rather than a partial repair. The water pump gasket carries the O.E. Cross-reference 6E5-44315-A0-00 and the mounting bolts cross-reference to O.E. 97095-08045-00, so the internal hardware matches factory specifications. Installing a complete kit like this at once helps prevent a repeat teardown if a worn housing or hardened gasket surface causes a new impeller to fail prematurely.

This is a direct fit for the Yamaha outboard applications that used the original 61A-W0078-A2-00 and 61A-W0078-A3-00 water pump assemblies, making it a straightforward like-for-like replacement during scheduled water pump service or when diagnosing overheating and reduced cooling water discharge.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3396-1
• Item Type: Water Pump Kit with Housing
• Fitment: Yamaha Outboards
• Weight: 1.6125 pounds
• Package Dimensions: 10.8 cm (L) x 18 cm (H) x 12.8 cm (W)
• Included Components: Water pump housing, impeller, wear plate, impeller key, insert cup, water pump gasket, 4 mounting bolts, 2 O-rings
• Water Pump Gasket O.E. Number: 6E5-44315-A0-00
• Mounting Bolt O.E. Number: 97095-08045-00
• UPC: 808282362126

Fitment

• Yamaha Outboards using the 61A-W0078-A2-00 and 61A-W0078-A3-00 water pump assemblies

Replaces (OEM)

• 61A-W0078-A2-00
• 61A-W0078-A3-00

Frequently Asked Questions

What does the Sierra 18-3396-1 kit include? The 18-3396-1 kit includes a water pump housing, impeller, wear plate, impeller key, insert cup, water pump gasket, 4 mounting bolts, and 2 O-rings, giving you a complete water pump rebuild rather than just an impeller.

Does this kit include the water pump housing? Yes, the Sierra 18-3396-1 is the housing-included version of this water pump kit, so you do not need to source the housing separately.

What Yamaha outboards does the 18-3396-1 fit? This kit fits Yamaha outboard models that originally used the 61A-W0078-A2-00 or 61A-W0078-A3-00 water pump assembly.

What OEM part numbers does the 18-3396-1 replace? Sierra 18-3396-1 replaces Yamaha OEM numbers 61A-W0078-A2-00 and 61A-W0078-A3-00.

How much does the water pump kit weigh? The Sierra 18-3396-1 Water Pump Kit with Housing weighs 1.6125 pounds.

What is the O.E. Number for the water pump gasket in this kit? The water pump gasket included in the 18-3396-1 kit cross-references to O.E. Number 6E5-44315-A0-00.

What O.E. Number do the mounting bolts match? The four mounting bolts included in the 18-3396-1 kit cross-reference to O.E. Number 97095-08045-00.

Is this a genuine Yamaha part or an aftermarket replacement? The 18-3396-1 is a Sierra-brand aftermarket kit manufactured to match the fit and function of the original Yamaha water pump assembly, not a Yamaha-branded part.

How many O-rings come in the kit? The Sierra 18-3396-1 kit includes 2 O-rings along with the housing, impeller, wear plate, impeller key, insert cup, gasket, and bolts.

When should I replace the water pump kit instead of just the impeller? If the water pump housing is cracked, corroded, or worn, replacing the full 18-3396-1 kit addresses the housing along with the impeller and wear components in a single job instead of risking a repeat teardown.

What is the package size of the 18-3396-1 kit? The Sierra 18-3396-1 Water Pump Kit with Housing ships in a package measuring 10.8 cm (L) x 18 cm (H) x 12.8 cm (W).