43-18411A 2 - Gear Set -1.50:1
Upper Gear Kit 20-22 teeth, 1.50/1.47 ratio Fits MC-I, R, MR, Alpha One & Gen II (s/n 0K999999 and below) (1971-1997)
You could also consider getting OMC 0775510 - Upper Gear Set. It is the same gear set and might be less expensive.
Mercury Quicksilver Gear Set-1.50:1 43-18411a 2 is equivalent to parts:
- 18-2201 Sierra Marine
- MR-843 OBR Red Rhino
- MR-137 OBR Red Rhino
- 11210 GLM