UANOFCN Outboard Water Pump Impeller Kit Model: 68V-W0078, 50-115 HP with Housing complete housing, seals & bolts

The UANOFCN 68V-W0078 Outboard Water Pump Impeller Kit is a complete replacement set engineered to restore cooling circulation on Yamaha 75–115 HP 4-stroke outboards.

This kit provides the core components needed to rebuild the water pump assembly on compatible Yamaha engines so you can maintain reliable engine cooling and extend the life of the outboard. It includes the housing, impeller, seals and fasteners that match OEM form and fit specifications for popular F75, F90, F115, LF115 and VF115 models. Each part is supplied ready for installation or to keep as a service spare when you’re preparing for a season on the water.

Which Yamaha engines does this kit fit?

It’s designed for 4-stroke Yamaha outboards in the 75–115 horsepower range, including F75, F90, F115 and LF115/VF115 variants. Fitment is based on the OEM part numbers listed by Yamaha and common aftermarket cross-references.

• Compatible with Yamaha 75, 90, 115 HP 4-stroke models
• Replaces Yamaha 68V-W0078-01-00 and 68V-W0078-00-00
• Also cross-references Sierra 18-3523-1 / 18-3442 and Mallory 9-48611
• Contact seller with your engine model number to confirm fit

What parts are included and why they matter?

The kit supplies the water pump housing assembly plus internal components you’ll need to complete a proper impeller replacement. Having the matched housing, gaskets and fasteners reduces the risk of leaks and ensures the impeller sits correctly for optimal coolant flow.

• Water pump housing and base outer plate for correct alignment
• Impeller, impeller key and insert cup for effective water circulation
• O-ring, gasket and dowel pin to prevent leaks and ensure seal integrity
• Bolts included for straightforward reassembly without sourcing extra hardware

How difficult is installation and what should I prepare?

Installation is a moderate DIY marine service task best performed with basic mechanical skills and hand tools. Expect to drain the lower unit, remove the old pump housing, fit the new components, and torque fasteners to manufacturer specs. If you’re not comfortable, a marine mechanic can typically complete the swap quickly.

• Recommended tools: standard socket set, torque wrench, gasket scraper
• Plan for lower unit removal and fresh gearbox oil after reassembly
• Inspect drive shaft and seals while the lower unit is accessible
• Contact us with your engine model if you need compatibility help

How does this kit help prevent summertime breakdowns?

The impeller is the first line of defense for engine cooling; replacing a worn rubber impeller and any compromised seals prevents overheating and cavitation-related damage. A complete kit reduces the chance of a mid-season failure by restoring the pump to near-original performance.

• New impeller ensures proper water flow to the heat exchanger
• Fresh gaskets and O-ring stop external leaks that lower cooling efficiency
• Properly aligned housing prevents premature impeller wear

Who is this for: This UANOFCN 68V-W0078 kit is for boat owners, DIY mechanics, and marine service shops working on Yamaha 75–115 HP 4-stroke outboards who need an OEM-equivalent replacement. It’s especially useful for routine seasonal maintenance, pre-trip checks, or repairing a pump after signs of reduced water flow. If you’re unsure about fitment, provide your exact engine model number to the seller for confirmation before ordering.