Yamaha - Water Pump Repair Kit - Cooling System Service Kit - F70 - 6CJ-W0078-00-00

Overview

Keeping a Yamaha outboard running cool starts with a healthy water pump. The Yamaha Water Pump Repair Kit 6CJ-W0078-00-00 includes the core service parts needed to restore proper water flow through the engine’s cooling system. It is a common maintenance kit many Yamaha owners install during routine service to keep their motors dependable through long days on the water. Whether you are cruising the bay, fishing offshore, or putting hours on the engine during the season, a properly serviced water pump helps protect the engine from heat and wear.

Key Features

• Genuine Yamaha OEM Components – Built to Yamaha specifications for dependable fit and long term durability.
• Complete Cooling System Service Kit – Includes essential components needed to service the Yamaha water pump assembly.
• Consistent Water Flow Support – Helps maintain steady cooling water circulation through the engine.
• Direct Fit Replacement – Designed to install properly within compatible Yamaha water pump housings without modification.

Engine & Boat Compatibility

• F70 - 2010-Current

FAQ

Q: How do I know when the water pump needs service?
A: Signs can include reduced water flow from the telltale stream, rising engine temperature, or overheating warnings while running.

Q: How often should the water pump be serviced on a Yamaha outboard?
A: Many technicians recommend servicing the water pump every one to two seasons depending on engine hours and operating conditions.

Q: Does saltwater use affect water pump components?
A: Yes. Sand, salt, and debris can wear internal components over time, which is why regular inspection and maintenance are important.

Q: Is installing a water pump repair kit difficult?
A: Many boat owners perform this service themselves, though it usually requires removing the lower unit to access the pump assembly.

Q: Will replacing the water pump help if the engine runs warmer than usual?
A: If worn components are restricting water flow, installing a new repair kit can restore proper cooling system circulation.

• Supersessions
  6CJ-W0078-01-00, 6CJ-W0078-01-00