Mercury/Quicksilver 23-8M0070256 is an OEM propeller bore sleeve used on select Mercury outboards to support proper propeller fitment. This part has been superseded by 8M0214998, so buyers should verify compatibility by engine serial number before ordering.
A Mercury propeller bore sleeve is a plastic insert that helps seal the gap between the propeller hub and gearcase on select Mercury outboards. It helps reduce exhaust blow-by, ventilation, cavitation, and power loss caused by poor propeller fitment.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
