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The OSN has a swept blade design with a narrow tip. it is an OEM equivalent for newer style Viper OMC SST. It is available in 3 and 4 blades. The four blade typically provides better overall performance.
THRU HUB EXHAUST
15 TOOTH SPLINE
RUBBER HUB
T50HP '96~
60HP '92~
T60HP '03~
70HP '84~
75HP '94~
F75HP '03~
80HP '78-'89
F80HP '99~
85HP '91-97
90HP '84~
F90HP '03~
F100HP '99~
115HP '84~
F115HP '00~
130HP '84~