Model Model Years Engine TBO Notes
172 1956-1958 Continental O-300/145hp 1800  Straight-tail, gross weight 2200 pounds,12-volt electrical system
172 1959 Continental O-300/145hp    Cowling changed to improve cooling, instrument panel redesigned
172A 1960 Continental O-300/145hp    Introduced the swept tail, wet vacuum pump option
172B 1961 Continental O-300/145hp    Shortened undercarriage, lengthened engine mount, pointed prop spinner
172C 1962 Continental O-300/145hp    Key operated starter, optional child seat in baggage compartment; floatplane option
172D 1963 Continental O-300/145hp    Wraparound rear window and one-piece windscreen
172E 1964 Continental O-300/145hp    Electric fuses replaced by circuit breakers, gross weight 2300 pounds
172F 1965 Continental O-300/145hp    Electrically operated flaps replaced the "Johnson" bar
F172 1965-1971 Continental O-300/145hp    Built in France by Reims Cessna
172G 1966 Continental O-300/145hp    Extension added between crankshaft and propeller, spinner lengthened
172H 1967 Continental O-300/145hp    Nose gear strut shortened, improved cowling, alternator replaces generator
172I 1968 Lycoming O-320-E2D/150hp 2000  14-volt electrical system
172K 1969 Lycoming O-320-E2D/150hp    Larger rear side windows, dorsal fin added to vertical stabilizer
172K 1970 Lycoming O-320-E2D/150hp    Drooping fiberglass wingtips
172L 1971 Lycoming O-320-E2D/150hp    Tubular steel main gear replaced the old spring steel undercarriage
172L 1972 Lycoming O-320-E2D/150hp    Dorsal fin extended, propeller diameter reduced by 1 inch
172M 1973 Lycoming O-320-E2D/150hp    Drooped wing leading edge
172M 1974 Lycoming O-320-E2D/150hp    Baggage compartment size increased
172M 1975 Lycoming O-320-E2D/150hp    
172M 1976 Lycoming O-320-E2D/150hp    Airspeed registration changed from MPH to Knots
172N 1977 Lycoming O-320-H2AD/160hp    The problematic H2AD engine was introduced, "notched" flap control
172N 1978 Lycoming O-320-H2AD/160hp    28-volt electrical system replaced the old 14-volt system
172N 1979 Lycoming O-320-H2AD/160hp    Vfe increased to 110kias for 10 degrees; floatplane option
172N 1980 Lycoming O-320-H2AD/160hp    
R172K XP 1977-1981 Continental IO-360-k/195hp    Fuel injection, constant speed prop, 131 knots cruise speed, cowl flaps
"Cutlass RG"
1980-1984 Lycoming O-360-F1A6/180hp    Retractable landing gear, constant speed prop, backup electric fuel pump, cowl flap
172P 1981 Lycoming O-320-D2J/160hp    Gross weight 2400 pounds, maximum flap extension 30 degrees
172P 1982-1983 Lycoming O-320-D2J/160hp    
172P 1984 Lycoming O-320-D2J/160hp    
172P 1985-1986 Lycoming O-320-D2J/160hp    
1983  Lycoming O-360-A4N/180hp    Gross weight 2550 pounds
172R 1996 Lycoming IO-360L2A/160hp    Fuel injection, gross weight 2450 pounds
172S 1998 Lycoming IO-360L2A/180hp    Gross weight 2550 pounds
172S 2007 Lycoming IO-360L2A/180hp    Garmin G1000 becomes standard

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