Check fitment before purchasing. 27-65744 is replaced by 27-65744 3 they are also the same part just different numbers. Works on some:
Mariner Outboards - 135, 150 & 175.
Mercury Outboards - 135, 150, 300 & 3.4L.
Mercury Race Outboards - XR2.
Sea Ray Boat - 135 & 175.