Sierra Water Pump Repair Kit with Housing 18-3473, Replaces 6EE-W0078-00-00, Fits Yamaha F4/F6 (2009-17)

The Sierra 18-3473 is a complete water pump repair kit with housing for Yamaha F4 (2009-17) and F6 (2009-17) outboards. Instead of sourcing an impeller and housing separately, this kit bundles the two core wear components needed to restore proper cooling water flow to the outboard: a replacement impeller and a new water pump housing. Over time, the rubber impeller vanes in an outboard water pump wear, take a compression set, or crack, reducing the volume of raw water the pump can push through the engine's cooling passages. The housing itself can also wear from years of impeller contact, so replacing both together restores the pump to like-new operating tolerances rather than pairing a fresh impeller with a worn housing. This kit is built to the OEM cross reference 6EE-W0078-00-00, so it is engineered as a direct equivalent for the water pump service parts on the specified Yamaha outboards. Keeping the water pump in good working order is essential to preventing overheating damage to the powerhead, so this kit is a practical stocking item for scheduled maintenance or as an emergency spare aboard the boat. Installation follows standard outboard lower unit water pump service procedure, replacing the impeller and housing as a matched set.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3473
• Kit Type: Water Pump Repair Kit with Housing
• Kit Contents: Impeller (O.E. # 6E0-44352-00), Water Pump Housing
• OEM Cross Reference: 6EE-W0078-00-00
• Fitment: Yamaha F4 (2009-17), F6 (2009-17)
• Weight: 0.45 pounds
• UPC: 808282376819

Fitment

• Yamaha F4 outboard (2009-17)
• Yamaha F6 outboard (2009-17)

Replaces (OEM)

• 6EE-W0078-00-00

Frequently Asked Questions

What does the Sierra 18-3473 kit include? The kit includes a water pump impeller (O.E. # 6E0-44352-00) and a water pump housing, giving you both core wear components in a single kit rather than needing to order them separately.

Which outboards does the 18-3473 water pump kit fit? It fits Yamaha F4 outboards from 2009-17 and Yamaha F6 outboards from 2009-17.

Is 18-3473 a direct replacement for the OEM Yamaha part? Yes, the 18-3473 kit is built to replace OEM part number 6EE-W0078-00-00 on the covered Yamaha F4 and F6 outboards.

Does this kit come with a housing or just an impeller? This is the version with housing included, part number 18-3473, so both the impeller and the water pump housing are in the box.

How much does the 18-3473 water pump kit weigh? The kit weighs 0.45 pounds.

Why replace the water pump housing along with the impeller? A worn housing can prevent even a new impeller from sealing and pumping correctly, so the 18-3473 kit pairs a fresh impeller with a new housing to restore full cooling water flow.

What is the OEM part number for the impeller inside the kit? The impeller included in the 18-3473 kit carries O.E. # 6E0-44352-00.

What brand is the 18-3473 water pump kit? It is manufactured by Sierra, a marine engine parts supplier.

What is the UPC for the Sierra 18-3473 kit? The UPC for this kit is 808282376819.

Will this kit work on a Yamaha F4 from before 2009? The 18-3473 kit is specified for Yamaha F4 outboards from 2009-17; fitment outside that range is not confirmed for this part number.

What signs indicate the water pump needs replacing? Reduced cooling water discharge, overheating, or a worn/cracked impeller are typical signs that the water pump on a Yamaha F4 or F6 needs the 18-3473 kit installed.