Water Pump Impeller Repair Kit for Yamaha Outboard 75-115 HP

In this review of the Water Pump Impeller Repair Kit for Yamaha Outboard 75-115 HP, the bottom line is simple: this kit is for boat owners and DIY mechanics who need a complete, direct replacement to restore cooling performance on select Yamaha 4-stroke outboards. The review finds the kit most valuable because it supplies not only the impeller but the housing insert, gasket, O-ring, hardware and alignment dowels needed to reinstall the pump correctly, which reduces parts hunting and downtime when servicing F75, F90 and F115 series motors.

Key Features

• Model compatibility: Fits Yamaha F75, F90, VF90, F115, FL115, LF115 and VF115 outboards so buyers get a direct replacement for common midrange engines.
• Complete kit: Includes impeller, water pump housing insert cup, base outer plate, gasket, O-ring, impeller key, dowel pins, bolts and washer, providing everything required for a single service job.
• OEM cross references: Replaces Yamaha 68V-W0078-00-00 and 68V-W0078-01-00 plus Sierra 18-3442 and Mallory 9-48611 so fitment can be confirmed against factory references.
• Restores cooling flow: The impeller is designed to push coolant through the engine cooling passages to remove engine heat effectively when installed correctly.
• Quality build: Customers report good quality and functional fit, making it a dependable option for routine maintenance.

Who It's For

This kit is aimed at boat owners, anglers and marine technicians who maintain Yamaha F75 through F115 4-stroke outboards and prefer to perform service themselves. It is particularly useful for those who want a single purchase that includes all small parts needed for a pump rebuild, which simplifies a roadside or workshop repair.

Those who should look elsewhere include owners of non-compatible Yamaha models or two-stroke engines, and anyone needing a kit that is explicitly branded by the original engine maker; this product is an aftermarket replacement that uses OEM cross-reference numbers for compatibility guidance.

Pros & Cons

Pros

• Comprehensive parts list reduces the chance of missing hardware during reassembly.
• Replaces multiple factory part numbers, helping ensure correct fit on listed models.
• Users note reliable fit and proper function once installed, restoring coolant flow.

Cons

• As an aftermarket kit, it may not include brand-specific packaging or documentation some owners expect from factory parts.

Specifications

Brand	GHmarine
Fits	Yamaha F75, F90, VF90, F115, FL115, LF115, VF115
Replaces	Yamaha 68V-W0078-00-00, 68V-W0078-01-00; Sierra 18-3442; Mallory 9-48611
Package contains	Impeller, housing insert cup, base outer plate, gasket, O-ring, impeller key, dowel pins, bolts, washer
Application	Water pump impeller to move coolant through engine cooling system

Our Verdict

This Water Pump Impeller Repair Kit is a practical, cost-effective option for owners of Yamaha F75-F115 4-stroke outboards who want a complete replacement set. It delivers the necessary parts to restore cooling performance and avoids multiple orders for small components, making it a good value for routine maintenance and emergency repairs.

Frequently Asked Questions

Does this kit include all parts needed to replace the impeller?
Yes. The kit includes the impeller plus housing insert, base plate, gasket, O-ring, impeller key, dowel pins, bolts and washer to complete a single pump rebuild.

Will this fit my Yamaha F90 outboard?
Yes. The kit lists compatibility with Yamaha F90 and other F75 and F115 series 4-stroke outboards noted in the product references.

Is this an OEM Yamaha part?
No. It is an aftermarket kit that cross-references Yamaha and other OEM part numbers for compatibility.