3 CYLINDER, 4 & 6 IN LINE CYLINDER 650 4 Cyl. (2:1)..........1961-70 800-850 4 Cyl...........1972-77 50 HP (Yamaha)..........1977 650 2 Cyl....................Thru 1971 900-1500 Models.....Thru 1977 80 HP (Mariner)............1977 800-850 6 Cyl............Thru 1972     Boat Diameter Aluminum Part No. Length/Description Rot. & Pitch Blade # OEM Michigan 20-24' Boats 13 R 11 3 48-35936A3 032089 19-22' Boats 13 R 13 3 48-58826A3 032090 17-19' - AL, SK 13 R 15 3 48-32390A3 032091 17-19' - AL, SK 13 R 15 3   031001 17-19' - AL, SK 13-3/4 R 15 3     16-17' - AL, SK 13 R 17 3 48-65022A1 032092 16-17' - AL, SK 13 R 17 3   031002 16-17' - AL, SK 13-1/4 R 17 3     15-18' - AL, SK 13 R 19 3 48-65024A1 032093 15-18" - AL, SK 13 R 19 3   031003 14-16' - AL, SK 13 R 21 3 48-67280A1 032094 14-16' - AL, SK 13 R 21 3   031004    60-140 HORSEPOWER - 3 CYLINDER, 4 & 6 IN LINE CYLINDER 60 HP (Bigfoot/Sea Pro Only, NOT 4-Stroke)....1995 & Newer 100 HP.......................................................1988 & Newer 650 2 Cyl........................Thru 1971 60 HP (Sea Pro/Marathon)................................1995 & Newer 115 HP.......................................................1978 & Newer 800-850 6 Cyl.................Thru 1972 70 HP................................................................1987-89 115 HP 4-Stroke....................................... 2001 & Newer 800-850 4 Cyl.................1972-77 75 HP (2 & 4 Stroke)........................................1984 & Newer 125 HP.......................................................1994 & Newer 900-1500 Models............Thru 1977 75 HP (Sea Pro/ Marathon)..............................All Years 140 HP (Includes Sea Pro & Offshore).... 1978-81 80 HP (Yamaha)..............1977 80 HP...............................................................1978-89 650 4 Cyl. (2:1).........................................1961-70 80 HP (Mariner)................1977-83 90 HP (2 & 4-Stroke).......................................1978 & Newer     Boat Diameter Aluminum Part No. Length/Description Rot. & Pitch Blade # OEM Michigan 25' & Up - AL 14 R 11 3 48-77338A40 031054 22' & Up - AL 14 R 13 3 48-77340A40 031055 19-24' - AL 13-3/4 R 15 3 48-77342A40 031041 17-20' - AL, SK 13-1/4 R 17 3 48-77344A40 031042 16-19' - AL, SK 13 R 19 3 48-77346A40 031043 15-18' - AL, SK 12-3/4 R 21 3 48-77348A40 031044 15-18' - AL, SK 13 R 21 3     Lt. Runabouts, LL 12-1/2 R 23 3 48-77350A40 031045 High Performance         High Performance