- 18-8910 Impeller Replacement Water Pump Impeller For Outboard Motor 4-Stroke F6 F8 F9.9 – Replaces 68T-44352-00, 18-8910 – 52.83mm Diameter, 13.97mm Height
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About This Product
If your outboard motor is overheating or not pumping water at idle, the water pump impeller is likely worn or broken.
This replacement impeller fits 4-stroke Yamaha F6, F8, and F9.
9S.
Replaces OEM part numbers 68T-44352-00, 68T-44352-00-00, and 18-8910 – so it's a direct match.
Dimensions: outer diameter is 52.
97mm, and the internal hub diameter is 11.
96mm.
These specs matter – if they match your old impeller, you're golden.
It's a rubber impeller with flexible vanes that spin inside the pump housing to draw cooling water up from the lake or ocean.
Replacing it is routine maintenance – do it every few years or if you see signs of wear.
Install is straightforward if you've got basic mechanical skills – drop the lower unit, remove the pump housing, swap the impeller, and reassemble.
No special tools needed.
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