Compatible Applications

Yamaha OEM 90201-22M01-00 is used on a wide range of Yamaha outboards from 90HP through 300HP. Mercury OEM 8556822 cross references to the same washer used on Mercury FourStroke applications derived from Yamaha platforms.

OEM & Cross Reference Numbers

Alternative Brand Available

GLM 90201GM Water Pump Washer

We also stock the GLM 90201GM version of this water pump washer. It replaces the same Yamaha and Mercury OEM numbers and fits the same applications.

View GLM 90201GM

What This Part Is Used For

This washer is installed within the water pump assembly and functions as a spacing and load-distribution component. Proper washer thickness and placement are important for maintaining correct water pump assembly geometry and component alignment.

During water pump service, technicians commonly inspect and replace washers, spacers, wear plates, impellers, housings, and seals together to help restore cooling system performance.

Why Replace a Water Pump Washer?

• Prevents excessive wear on water pump components
• Maintains proper spacing within the water pump assembly
• Helps ensure correct impeller and housing alignment
• Recommended during major water pump rebuilds
• Inexpensive preventative maintenance item

Sierra 18-90201 Features

• Direct replacement for Yamaha 90201-22M01-00
• Direct replacement for Mercury 8556822
• Fits Yamaha F90-F300 applications
• Fits Yamaha VF-Series SHO models
• Fits Yamaha VMAX, OX66, HPDI, and Saltwater Series engines
• Compatible with Mercury 225 and 250 EFI FourStroke models
• Quality Sierra Marine aftermarket replacement

FAQ

What OEM numbers does Sierra 18-90201 replace?
Yamaha 90201-22M01-00 and Mercury 8556822.

What Yamaha engines use this washer?
Common applications include Yamaha F90-F300, VF-Series SHO, VMAX, HPDI, OX66, and Saltwater Series outboards.

Does this fit Mercury outboards?
Yes. Mercury OEM 8556822 is commonly used on Mercury 225 and 250 EFI FourStroke applications.

Should this washer be replaced during impeller service?
It should always be inspected and replaced if wear, scoring, corrosion, or damage is present.

Do you carry another brand?
Yes. We also stock the GLM 90201GM version linked above.

Searchable Terms

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