28-56655 impelller drive key used on some Merc 3.9, 4.0, 4.5, Merc 60, 7.5, 9.8hp old # 17-39076

47-89984 - Sierra # 18-3017 Impeller for all 4 cylinder 650, 800 and 850 models. All 6 cylinder models with gearshift and Merc 800 direct reversing.

$ 21.95

18-3217 - Basic water pump repair kit with impeller (no housings) fits all 4 and 6 cylinder models 650-1500 1963 to 1986

$ 37.95

47-89983 - Sierra # 18-3007 Impeller for 4 cylinder Mark 55,58 Merc 350,400,450 and 500 old #47-20268 (more)

$ 17.05

47-89981 - Impeller for Mercury models 4.0, 4.5, 7.5 and Merc 110 9.8hp old # 47-39074

$ 13.95