OEM Outboard Water Pump Kits & Impellers

The water pump impeller is the rubber part that moves cooling water through an outboard, and it wears whether the motor is run or stored, because rubber hardens with age. A worn impeller is the most common cause of an overheat alarm. A repair kit includes the impeller plus the gaskets, seals and, where the maker specifies it, the housing or wear plate needed to do the job once.

This collection holds genuine OEM water pump repair kits and individual impellers for the three brands we are authorized for. To see one brand only, go to Suzuki water pump kits, Honda water pump kits or Yamaha water pump kits.

Frequently asked questions

How often should the impeller be replaced?

Suzuki's schedule is to inspect the water pump and impeller every 200 hours or 12 months and replace the impeller every 300 hours or 36 months. For Honda and Yamaha, follow the interval in that engine's owner's manual. Motors run in sand or silt should be checked sooner.

Should I buy the kit or only the impeller?

The kit is the safer choice for a scheduled service, because the gaskets and seals disturbed during the job are replaced along with the impeller. An impeller on its own suits a pump whose housing and wear plate are in good condition.

What are the signs of a worn impeller?

A weak or missing stream from the pilot water outlet, and an overheat alarm. Stop the engine and find the cause before running it again.

Can I run the engine out of the water?

Not without a water supply to the pump. A rubber impeller run dry is damaged very quickly.

What else is in the cooling system?

Thermostats are the other common service item, and all other parts are under cooling and water pump parts. For a full scheduled service, see maintenance kits.

Boat Max Online is an authorized dealer for all three brands; every kit is genuine OEM. Free shipping on orders over $149 to the lower 48 states.