28-56655 impelller drive key used on some Merc 3.9, 4.0, 4.5, Merc 60, 7.5, 9.8hp old # 17-39076
28-56655 impelller drive key used on some Merc 3.9, 4.0, 4.5, Merc 60, 7.5, 9.8hp old # 17-39076
use with impeller #47-89980 and 47-89981
28-56655 impelller drive key used on some Merc 3.9, 4.0, 4.5, Merc 60, 7.5, 9.8hp old # 17-39076
use with impeller #47-89980 and 47-89981