Yamaha - Bolt, stud - 90116-10M66-00 Mercury-300HP-4-6L-V8-Racing-2019 it’s typically replaced during repairs

it’s typically replaced during repairs or engine rebuilds

This technologically advanced semi-synthetic base stock and additive 2-stroke engine oil provides all-season performance and greatly reduces visible smoke

This product has been superseded by: 91-8M0050507

This is a key feature that facilitates a watertight seal that protects the engine and wiring harness from corrosion

and fewer rattles at idle

Yamaha - Bolt, stud - 90116-10M66-00 Mercury-300HP-4-6L-V8-Racing-2019 it’s typically replaced during repairs90116 10M66 00 BOLT, STUD 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.