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Continental IO-550-A Engine | Cessna 310R Colemill

IO-550-A, -B, -C, -D, -E, -F, -G, -L, -N | TSIO-550-B, -C, -E, -G, -K, -N

What do you say about an engine family that ranges in power from 285 hp all the way to 375 HP? Innovative? Versatile? Amazing? How about all of the above? Continental^® introduced the first 500 series engine to the world in the Beechcraft^® Bonanza and the Cessna^® Centurion in 1964. The 500 series includes both 520 and 550 cubic-inch models in either naturally aspirated or turbocharged configurations.

Financing is available from the Van Bortel Finance Corporation for all new and rebuilt Continental® engines for sale at Air Power Inc.

Featured products

I0550A8BN Continental Engine - NEW IO-550-A8

PN: I0550A8BN

Out of stock

$63,238.00

I0550A10BN Continental Engine - NEW IO-550-A10

PN: I0550A10BN

Out of stock

$63,238.00

I0550A10BR Continental Engine - REBUILT IO-550-A10

PN: I0550A10BR

Out of stock

$57,065.00

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Continental IO-550-A Engine – Factory New

Continental IO-550 Series Engine The Continental IO-550-A is a factory-new, high-performance aircraft engine producing 300 horsepower at 2700 RPM. Built for smooth operation and consistent power output, this six-cylinder, fuel-injected powerhouse is trusted by aircraft owners and overhaul centers worldwide.

Air Power, Inc. is the largest global distributor of Continental engines and Continental’s preferred provider. We maintain deep inventory, offer the most competitive prices, and provide best-in-class support for all engine purchases.

Engine Overview

The IO-550-A is part of Continental’s renowned 500 Series—developed from the IO-520 with a longer stroke and larger displacement. Known for robust reliability, this engine is a favorite in general aviation applications requiring consistent high-power performance and dependable fuel efficiency.

Technical Specifications

Model: IO-550-A
Configuration: 6-cylinder, horizontally opposed
Displacement: 552 in³ (9.05 L)
Power Output: 300 HP @ 2700 RPM
Bore x Stroke: 5.25 in x 4.25 in (133.35 x 107.95 mm)
Fuel System: Continuous flow fuel injection
Compression Ratio: 8.5:1
Dry Weight: 466.9 lbs (211.8 kg)
Fuel Type: 100/100LL aviation gasoline
TBO (Time Between Overhaul): 1900 hours or 12 years
OEM P/N: IO-550-A

Benefits of the IO-550-A

This engine delivers powerful performance and smooth operation across a wide range of flight conditions. The IO-550-A is ideal for high-performance single-engine aircraft where top-end horsepower, reliability, and fuel efficiency are essential.

High-Altitude Ready

Continental’s engineering ensures the IO-550-A maintains efficient power output at altitude. With optimized combustion and fuel delivery, you get consistent performance even in demanding flight profiles.

Backed by Industry Leaders

Air Power’s close relationship with Continental Aerospace Technologies™ ensures priority access to engines and service. All engines come with a factory-backed warranty and the full support of our experienced team.

Order the IO-550-A Today

Call or email our engine specialists to order your Continental IO-550-A. We offer fast turnaround, shipping worldwide, and assistance with installation planning and documentation.