MERCURY MARINER 25 30 40 50 HP WATER PUMP IMPELLER REPAIR KIT REPL 821354A2 3219
TWO CLEAR WASHERS GO ON THE DRIVE SHAFT, ONE EACH SIDE OF THE IMPELLER. INCLUDES IMPELLER DRIVE KEY. IF YOU DON'T KNOW, DROP THE UNIT AND DO A VISUAL. THIS DOESN'T FIT FORCE MODELS WITH THE OLD CHRYSLER GEARCASE.