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Continental IO-550-E Engine | For Cessna 310, Bonanza, Baron

IO-550-A, -B, -C, -D, IO-550-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

I0550E6BN Continental Engine - NEW IO-550-E6

PN: I0550E6BN

Out of stock

$69,071.00

I0550E6BR Continental Engine - REBUILT IO-550-E6

PN: I0550E6BR

Out of stock

$61,778.00

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Continental IO-550-E Engine – Factory New or Rebuilt

Continental IO-550-E Engine The Continental IO-550-E is a high-performance 6-cylinder fuel-injected engine designed for twin- and high-performance single-engine aircraft. With a rating of 300 horsepower at 2700 RPM, the IO-550-E delivers smooth power, responsive throttle, and reliable operation across a wide range of platforms.

Air Power, Inc. is the world’s largest distributor of Continental engines and the factory’s preferred partner for sales and technical support. We stock both factory new and rebuilt IO-550-E engines, ready to ship globally with expert assistance.

Aircraft Compatibility

The IO-550-E is commonly installed in the following aircraft:

Cessna 310 (via STC or OEM replacement)
Beechcraft Bonanza (select models and Colemill upgrades)
Beechcraft Baron (certain configurations)
Colemill Panther Conversion (performance upgrade STC)

Engine Specifications

Model: IO-550-E
Power: 300 HP @ 2700 RPM
Displacement: 552 in³ (9.05 L)
Configuration: 6-cylinder, air-cooled, horizontally opposed
Compression Ratio: 8.5:1
Weight: Approx. 470 lbs depending on configuration
Fuel Type: 100/100LL aviation gasoline
TBO: 1,700–1,900 hours

Installation Questions? Here’s What We’ll Need to Confirm:

New or Rebuilt?
We offer both factory new and factory rebuilt IO-550-E engines. Rebuilt engines carry new serial numbers and meet the same production tolerances as new units.
Alternator Option:
Do you need an engine without alternator provisions or a 24-volt alternator included? Let us know your aircraft electrical system requirements.
Oil Cooler Type:
The IO-550-E supports both:
- Remote mounted oil cooler setups
- 8.888-inch decongealing oil cooler (for aircraft with cooler-on-engine configurations)
We’ll help identify the correct cooler interface for your application.
Fuel Pump:
Do you require an altitude-compensating fuel pump? These pumps are typically used for aircraft operating at varying altitudes and are available by request.

Popular with Colemill Conversions

The IO-550-E is the heart of several Colemill Panther conversions, offering a significant performance boost over legacy engines. Whether you're upgrading or replacing, this engine provides improved climb, cruise, and fuel economy.

Order with Confidence

Our expert team at Air Power will help you match the correct engine variant to your airframe and installation. From verifying your oil cooler compatibility to alternator and fuel system configuration, we take the guesswork out of engine replacement.

Call today to receive a quote or confirm your specifications. We ship worldwide and support owners, fleet operators, and certified maintenance facilities across the globe.