Cooling System | Yamaha Outboard

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

Sierra 18-90201, 18-90201, Yamaha 90201-22M01-00, Mercury 8556822, Mercury 12-8556822, water pump washer, driveshaft washer, Yamaha F250 water pump parts, Yamaha F300 water pump parts, Yamaha SHO water pump parts, Yamaha VMAX water pump washer, Yamaha OX66 water pump washer, Yamaha HPDI water pump washer, Mercury FourStroke water pump parts, GLM 90201GM

OEM Numbers & Cross References

The GLM 9076GM cross references directly to Yamaha OEM 61A-45527-00-00 and Mercury OEM 8886901.

Compatible Applications

Yamaha OEM 61A-45527-00-00 is used across a broad range of Yamaha V4 and V6 engines, including many Saltwater Series, EFI, OX66, VMAX, and four-stroke models. Mercury OEM 8886901 is commonly found on Mercury 225 and 250 EFI FourStroke outboards.

Alternative Brands Available

Mercury OEM 45527

Genuine Mercury factory replacement for customers seeking original equipment parts.

View OEM Version

Pro Marine 45527P

Popular aftermarket replacement used by marine repair shops and technicians.

View Pro Marine Version

Sierra 18-9076

Quality aftermarket alternative from Sierra Marine.

View Sierra Version

Designed for Water Pump Service & Rebuilds

The driveshaft collar works as part of the lower unit cooling system assembly. During water pump service, technicians frequently inspect and replace collars, spacers, wear plates, seals, and impellers together to help restore proper cooling system performance.

Because these components operate in a harsh marine environment, replacing worn parts during maintenance can help reduce the likelihood of future cooling system issues.

GLM 9076GM Features

• Replaces Yamaha OEM 61A-45527-00-00
• Replaces Mercury OEM 8886901
• Fits Yamaha V4 and V6 applications from 115HP through 300HP
• Fits Mercury 225 and 250 EFI FourStroke models
• Designed for lower unit cooling system repairs
• Ideal for water pump rebuilds and preventative maintenance
• Cost-effective aftermarket replacement

Why Choose GLM Marine Parts?

GLM Marine has supplied aftermarket marine engine components for decades and is well known throughout the boating industry for offering dependable replacement parts for outboard, sterndrive, and inboard applications.

The GLM 9076GM provides boat owners and marine technicians with a practical alternative to OEM components while maintaining compatibility with the original application.

FAQ

What OEM numbers does GLM 9076GM replace?
Yamaha 61A-45527-00-00 and Mercury 8886901.

What engines commonly use this driveshaft collar?
Many Yamaha V4 and V6 engines from 115HP through 300HP as well as Mercury 225 and 250 EFI FourStroke models.

Is this a genuine Mercury part?
No. This is a GLM Marine aftermarket replacement. The Mercury OEM version is linked above.

Do you stock other brands?
Yes. We also carry Mercury OEM, Pro Marine, and Sierra versions of this driveshaft collar.

When should this part be replaced?
The collar should be inspected during water pump service and replaced if wear, corrosion, or damage is present.

Searchable Terms

GLM 9076GM, 9076GM, Yamaha 61A-45527-00-00, Mercury 8886901, Yamaha V4 driveshaft collar, Yamaha V6 driveshaft collar, Yamaha OX66 water pump parts, Yamaha VMAX cooling system parts, Yamaha 225 driveshaft collar, Yamaha 250 driveshaft collar, Mercury 225 EFI FourStroke driveshaft collar, Mercury 250 EFI FourStroke driveshaft collar, Pro Marine 45527P, Sierra 18-9076, Mercury OEM 45527, GLM Marine replacement parts

OEM Numbers & Cross References

Yamaha identifies this component as a plate washer / water pump housing plate washer under OEM number 90201-22M01-00. Mercury and Mariner cross references include 8556822 and 12-8556822.

Compatible Applications

Fitment should be confirmed by matching the original OEM number. Yamaha 90201-22M01-00 is listed across many Yamaha water pump and gearcase applications, including 115HP through 250HP models in detailed OEM fitment listings, while aftermarket fitment data also identifies Yamaha 2-stroke 115-300HP, Yamaha 4-stroke 115-225HP, and Mercury 225 EFI FourStroke applications. :contentReference[oaicite:0]{index=0}

Also Available in Sierra Brand

Sierra 18-90201 Water Pump Washer

Prefer Sierra? We also stock the Sierra 18-90201 version of this Yamaha and Mercury water pump washer for the same OEM cross references.

View Sierra 18-90201

Where This Washer Is Used

This washer is used in the water pump and driveshaft area of the lower unit. It helps maintain the correct stack-up of components in the pump assembly, supporting proper fitment of the housing, plate, impeller, and related hardware.

Because the washer is small and inexpensive, many technicians inspect or replace it during water pump service instead of reusing a worn, corroded, or distorted washer.

GLM 90201GM Features

• Aftermarket replacement from GLM Marine
• Replaces Yamaha OEM 90201-22M01-00
• Replaces Mercury / Mariner OEM 8556822 and 12-8556822
• Used in water pump and driveshaft service
• Common on many Yamaha 2-stroke and 4-stroke outboard applications
• Common on Mercury 225 EFI FourStroke applications using the listed OEM number
• Sierra alternative linked above

FAQ

What OEM numbers does GLM 90201GM replace?
GLM 90201GM replaces Yamaha 90201-22M01-00 and Mercury / Mariner 8556822 or 12-8556822.

Is this the same as the Sierra washer?
It is the GLM version of the same application family. The Sierra 18-90201 version is linked above.

What Yamaha engines commonly use this washer?
It is commonly listed for many Yamaha 2-stroke 115-300HP and Yamaha 4-stroke 115-225HP water pump applications using OEM 90201-22M01-00.

Does this fit Mercury outboards?
Yes, when your Mercury or Mariner application uses OEM number 8556822 or 12-8556822. It is commonly listed for Mercury 225 EFI FourStroke applications.

Should this washer be replaced during water pump service?
Replace it if it shows wear, corrosion, distortion, or damage. Always follow your service manual and parts diagram.

Searchable Terms

90201GM, GLM 90201GM, Sierra 18-90201, 18-90201, 18-9078, 18-9079, Yamaha 90201-22M01-00, Mercury 8556822, Mercury 12-8556822, Yamaha water pump washer, Yamaha driveshaft washer, Yamaha plate washer, Yamaha F115 water pump washer, Yamaha F150 water pump washer, Yamaha F200 water pump washer, Yamaha F225 water pump washer, Yamaha VMAX water pump parts, Yamaha HPDI water pump washer, Mercury 225 EFI FourStroke water pump washer