Mercury-Mercruiser 1688-840307A3 GEAR HSG BASIC
1688-840307A3 GEAR HSG BASIC has been superceded to a new part number.
The newest part number is 840307T3 -click here- to see the newest superceded part
Please note the new superceded part is a functional replacement and may look differant from the original part
Manufacturer part number: