Sierra Bearing Cup Driver for Mercruisers MC-I, R-MR, Alpha One

Sierra part number: 18-9831

Replaces Mercury part numbers: 91-36577

Installs forward gear bearing cup in gear housing of MC-I, R-MR, Alpha One.

Please check the part numbers for your fitment needs. If you are unsure whether this part fits your model, please contact us with your engine HP, model/serial number and we can help determine if it is right for your engine. Thanks for looking!!!

Thank you for shopping at our store!!

Christine