Keep your big-block Yamaha running cool and confident with the Yamaha Impeller – 6GR-44352-00-00. Engineered for the F425 XTO Offshore and other 6GR-series V-8 outboards, this heavy-duty rubber rotor is the muscle behind your water pump, pushing a steady stream of seawater through the block even when you’re throttled up and trimming high.

Molded from UV-stable, abrasion-resistant compound, each of the precisely cut vanes flexes without cracking, then springs back to full shape for consistent pressure. The brass-sleeved hub locks onto the pump shaft with factory accuracy, so there’s no wobble, no uneven wear, and no surprise over-heat alarms crowding the display.

Why upgrade at your next service:

• High-flow design – deep, 12-vane profile moves more water to cool that 5.6-liter V-8 under heavy load.

• OEM exactness – keyed hub and diameter match Yamaha specs; zero trimming or shim packs.

• Built for offshore abuse – compound shrugs off sand and silt picked up on the flats or in the surf.

• Five-minute fit – slides into the existing stainless cup; pair with a new gasket and you’re done.

Swap it every 100 hours or annually, and chase the horizon knowing your XTO’s cooling system is working as hard as its horsepower.