400 ‒ Series

  • 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 - 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.

    Continental Motors 400 Series Engine

    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, dry oil sump and fuel injection or carburetor with manual mixture control.


    Certified fuels

    80/87, 91/96, 100/100LL and 100/130 avgas

    Displacement

    7702 cm³470 cu.in

    Power

    168 to 194 kW225 to 260 hp

    Maximum Rated RPM

    2400 to 2625 r/min2400 to 2625 rpm

    Bore

    127.0 mm5.00 in

    Stroke

    101.6 mm4.00 in

    Compression Ratio

    7.0:1 to 8.6:1

    Height

    501.7 to 721.9 mm19.75 to 28.42 in

    Width

    846.2 to 852.9 mm33.32 to 33.58 in

    Length

    915.2 to 1197.9 mm36.03 to 47.16 in

    Dry Weight

    160.6 to 193.2 kg354.15 to 426.06 lbs

    Time Between Overhaul

    Currently 1500 to 2400 * hrs

    Turbo Model Availability

    Yes

    * 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.

    400 Series Details

    Model Cylinders METO Power @RPM
    (Take off @ RPM)
    Bore x Stroke Displacement Dry Weight
    Basic Engine
    Fuel Grade Compression Ratio Recommended TBO
    O-470-J 6 168 kW @ 2550 127.0 x 101.6 mm 7702 cm³ 160.6 kg 80/87 7.0:1 1500 hrs or
    12 years
    225 hp @ 2550 5.00 x 4.00 in 470 cu.in 354 lbs
    O-470-K, L & M 6 171 kW @ 2600 127.0 x 101.6 mm 7702 cm³ 172.4 kg 80/87 7.0:1 1500 hrs or
    12 years
    230 hp @ 2600 5.00 x 4.00 in 470 cu.in 380 lbs
    O-470-R & S 6 171 kW @ 2600 127.0 x 101.6 mm 7702 cm³ 172.4 kg 80/87 7.0:1 1500 hrs or
    12 years
    230 hp @ 2600 5.00 x 4.00 in 470 cu.in 380 lbs
    O-470-U 6 171 kW @ 2400 127.0 x 101.6 mm 7702 cm³ 176.5 kg 100/100LL 8.6:1 2000 hrs or
    12 years
    230 hp @ 2400 5.00 x 4.00 in 470 cu.in 389 lbs
    IO-470-C 6 186 kW @ 2600 127.0 x 101.6 mm 7702 cm³ 182.3 kg 91/96 8.0:1 1500 hrs or
    12 years
    250 hp @ 2600 5.00 x 4.00 in 470 cu.in 402 lbs
    IO-470-D & E 6 194 kW @ 2625 127.0 x 101.6 mm 7702 cm³ 193.2 kg 100/130 8.6:1 1500 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 470 cu.in 426 lbs
    IO-470-F 6 194 kW @ 2625 127.0 x 101.6 mm 7702 cm³ 181 kg 100/130 8.6:1 1500 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 470 cu.in 399 lbs
    IO-470-H 6 194 kW @ 2625 127.0 x 101.6 mm 7702 cm³ 182.3 kg 100/130 8.6:1 1500 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 470 cu.in 402 lbs
    IO-470-J & K 6 168 kW @ 2600 127.0 x 101.6 mm 7702 cm³ 182.2/167.8 kg 80/87 7.0:1 1500 hrs or
    12 years
    225 hp @ 2600 5.00 x 4.00 in 470 cu.in 402/370 lbs
    IO-470-L & M 6 194 kW @ 2625 127.0 x 101.6 mm 7702 cm³ 186.4 kg 100/100LL 8.6:1 1500 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 470 cu.in 411 lbs
    IO-470-N 6 194 kW @ 2625 127.0 x 101.6 mm 7702 cm³ 187.8 kg 100/130 8.6:1 1500 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 470 cu.in 414 lbs
    IO-470-S 6 194 kW @ 2625 127.0 x 101.6 mm 7702 cm³ 185.5 kg 100/130 8.6:1 1500 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 470 cu.in 409 lbs
    IO-470-U, V & VO 6 194 kW @ 2625 127.0 x 101.6 mm 7702 cm³ 148.8 kg 100/130 8.6:1 1500 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 470 cu.in 406 lbs