Switch Box CDI Power Pack 332-4911 A2 20 HP
For Mercury Mariner Outboard 2 Cylinder
It fits 1972-1977 20hp 2 cylinder outboards that use one of the following part numbers only:

For Mercury/Quicksilver #332-4911A2

For Sierra #18-5786

For CDI Electronics #114-4911

Please verify the part number you need matches the entire number including the "A" suffix number at the end of the part number. Matching the correct part number including the "A" suffix number is critical for proper fitment.