You'll often hear pilots referring to the Continental® Motors O-470 in reverent tones as "old reliable." Powering the majority of Cessna 180 and fixed-gear 182 aircraft from 1953 through 1986, this workhorse of an engine embodies simplicity, efficiency and ruggedness. Its track record speaks louder than words. It's a true brawny powerplant. In fact, some versions make full power at a smooth, quiet 2400 rpm. Ranging in output from 225 to 260 horsepower, the 470 engines come equipped with either a very reliable carburetor or Continental's extremely efficient continuous-flow fuel injection system. Confidence among pilots can be hard to achieve, but if there was an award for one of the most trusted aircraft engines in the sky, the 400 series would win hands down. Just ask anyone.
The 400 Series is a family of 6-cylinder, air-cooled, horizontally opposed, direct-drive aircraft engines with hydraulic lifters, 2 pushrod-actuated valves per cylinder, oil sump and fuel injection or carburetor with manual mixture control.
80/87, 91/96, 100/100LL avgas
7722 cm³471 in³
168 to 194 kW225 to 260 hp
Maximum Rated RPM
2400 to 2625 r/min2400 to 2625 rpm
127.0 mm5.00 in
101.6 mm4.00 in
7.0:1 to 8.6:1
501.7 to 721.9 mm19.75 to 28.42 in
846.2 to 852.9 mm33.32 to 33.58 in
915.2 to 1197.9 mm36.03 to 47.16 in
171.5 to 196.0 kg378 to 432 lbs
Time Between Overhaul
Currently 1700 to 2200 * hrs
* Most engine models manufactured after February 2012 have a TBO increase of 200 hours. Engines used in frequent type service have an additional 200 hour increase. See Service Information Letter SIL98-9B for details.