Harmonic balancer/pulley

[2Tinker]

Hello,
Recently purchased my first boat, 1976 Starcraft Supersport 18 with a 3.0L 140 mercruiser. The harmonic balancer is worn out (wobbles at low rpm) and I am having trouble sourcing a new part. Any help would be appreciated

 

[Scott Danforth]

how are you having problems finding parts for one of the most prevalent I/O motors in history?

open any mercruiser parts book, or simply google 3.0 marine damper. even amazon has them

you need one for a 1990 or older motor.