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. 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.

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


    Certified Fuels

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

    Displacement

    7722 cm³471 in³

    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

    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.

    Continental Motors 400 Series Details

    Model # CYL Rated Power Bore x Stroke Displacement Dry Weight Certified Fuel Grade Compression Ratio Time Between Overhaul (TBO)
    O-470-J 6 168 kW @ 2550 127.0 x 101.6 mm 7722 cm³ 171.5 kg 80/87 7.0:1 Up to 1900 hrs or
    12 years
    225 hp @ 2550 5.00 x 4.00 in 471 in³ 378 lbs
    O-470-K, L  6 172 kW @ 2600 127.0 x 101.6 mm 7722 cm³ 183.3 kg 80/87 7.0:1 Up to 1900 hrs or
    12 years
    230 hp @ 2600 5.00 x 4.00 in 471 in³ 404 lbs
    O-470-M 6 179 kW @ 2600 127.0 x 101.6 mm 7722 cm³ 186.0 kg 91/96 7.0:1 Up to 1900 hrs or
    12 years
    240 hp @ 2600 5.00 x 4.00 in 471 in³ 410 lbs
    O-470-R, S 6 172 kW @ 2600 127.0 x 101.6 mm 7722 cm³ 181.9 kg 80/87 7.0:1 Up to 1900 hrs or
    12 years
    230 hp @ 2600 5.00 x 4.00 in 471 in³ 401 lbs
    IO-470-U 6 172 kW @ 2400 127.0 x 101.6 mm 7722 cm³ 186.9 kg 100/100LL 8.6:1 Up to 2400 hrs or
    12 years
    230 hp @ 2400 5.00 x 4.00 in 471 in³ 412 lbs
    IO-470-C 6 186 kW @ 2600 127.0 x 101.6 mm 7722 cm³ 196.0 kg 91/96 8.0:1 Up to 1900 hrs or
    12 years
    250 hp @ 2600 5.00 x 4.00 in 471 in³ 432 lbs
    IO-470-D, F 6 194 kW @ 2625 127.0 x 101.6 mm 7722 cm³ 193.2 kg 100/100LL 8.6:1 Up to 1900 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 471 in³ 426 lbs
    IO-470-E, L, S 6 194 kW @ 2625 127.0 x 101.6 mm 7722 cm³ 194.6 kg 100/100LL 8.6:1 Up to 1900 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 471 in³ 429 lbs
    IO-470-J, K 6 168 kW @ 2600 127.0 x 101.6 mm 7722 cm³ 181.4 kg 80/87 7.0:1 Up to 1900 hrs or
    12 years
    225 hp @ 2600 5.00 x 4.00 in 471 in³ 400 lbs
    IO-470-M 6 194 kW @ 2625 127.0 x 101.6 mm 7722 cm³ 194.1 kg 100/100LL 8.6:1 Up to 1900 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 471 in³ 428 lbs
    IO-470-H, N 6 194 kW @ 2625 127.0 x 101.6 mm 7722 cm³ 196.0 kg 100/100LL 8.6:1 Up to 1900 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 471 in³ 432 lbs
    IO-470-U, V, VO 6 194 kW @ 2625 127.0 x 101.6 mm 7722 cm³ 193.2 kg 100/100LL 8.6:1 Up to 1900 hrs or
    12 years
    260 hp @ 2625 5.00 x 4.00 in 471 in³ 426 lbs