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520 Series

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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.

IO-520-A,  -BB-CB-D,  -E-F-J-L-MB  |  LTSIO-520-AE  |  TSIO-520-AE,  -AF-BB-BE-C-CE-E-EB-G-H-M-NB-P-R-T-UB-VB-WB  |  GTSIO-520-H-L-M

Continental 520 Series Engines – Proven Power for High-Performance Aircraft

Continental 520 Series Engine The Continental® 520 Series represents one of the most trusted and versatile engine families in general aviation history. First introduced in 1964, the 520 series powers a wide range of twin and single-engine aircraft including the Beechcraft Bonanza and Baron, Cessna 185, 206, 210, 310, 340, and 421. It evolved from the IO-346 and laid the groundwork for today’s IO-550 family.

Available in fuel-injected (IO-520), turbocharged (TSIO-520), and geared (GTSIO-520) configurations, these engines offer 285 to 375 horsepower, smooth performance, and legendary reliability. They are available in both factory new and rebuilt options through Air Power—the world’s largest distributor of Continental engines.

520 Series Engine Highlights

  • Displacement: 520 in³ (8.5 L)
  • Power Output: 250 – 375 HP depending on model
  • Fuel Type: 100/100LL AvGas
  • Cooling: Air-cooled
  • Configuration: 6-cylinder, horizontally opposed
  • Fuel System: TCM continuous-flow fuel injection
  • Compression Ratios: 7.5:1 or 8.5:1 depending on model
  • Time Between Overhauls (TBO): 1400 to 2200 hours or 12 years

Common Aircraft Applications

  • Beechcraft Bonanza
  • Beechcraft Baron
  • Cessna 185, 206, 210, 310, 340, 421
  • Bellanca Super Viking
  • Cessna 404 (GTSIO-520)

Available Engine Configurations

Choose from a variety of models tailored to your aircraft and mission profile, including:

  • IO-520: Fuel-injected, naturally aspirated
  • TSIO-520: Turbocharged with fuel injection
  • GTSIO-520: Geared, turbocharged, high-output configuration

What We Need to Know to Properly Spec Your 520 Series Engine

  • Aircraft make and model
  • New or rebuilt preference
  • 12V or 24V electrical system
  • Engine position (if twin-engine aircraft)
  • Turbocharger and exhaust system requirements (if applicable)
  • Oil cooler type or dimensions (if applicable)
  • Starter and magneto type

Continental RFQ Process

Continental currently supports over 1,400 individual engine specs, but 90% of demand is met by fewer than 400 of those. If your 520 model requires a less common spec, Air Power will submit a Request for Quote (RFQ) on your behalf.

  • Processing Time: About 1 week
  • Outcome: Confirmed pricing and accurate lead time for your exact configuration

Why Buy from Air Power?

Air Power, Inc. is Continental’s largest and most experienced distributor. Whether you’re flying a Baron, Centurion, or pressurized twin, our team helps ensure the engine you receive is the perfect match to your airframe, electrical system, and mission profile. We offer expert support, rapid quoting, and access to both factory new and rebuilt powerplants—at competitive prices.

Request a quote today or explore individual model pages to get started.

The Preferred Provider of Continental® Engines Since 2018

Continental Aerospace Technologies™, headquartered in Mobile, Alabama, has been a global leader in general aviation piston aircraft engines for over 115 years. Continental® aircraft engines are synonymous with excellence, reliability and innovation. Air Power Inc. is proud to be the largest provider of Continental® engines and engine parts worldwide — and their preferred distributor since 2018. We carry an extensive range of gasoline and Jet-A engines to serve OEMs, flight schools, fleet customers and pilots across the globe and help keep their aircraft in top condition year-round. Whether you need Continental® engine parts or factory-new/rebuilt Continental® engines, Air Power Inc. can help you keep your aircraft in operation at the lowest prices in the industry.

Air Power Inc.'s trained team of Continental® sales experts makes purchasing Continental® engines easier. As the preferred distributor of new and rebuilt Continental® engines worldwide, we work directly with the folks at Continental Aerospace Technologies™ to ensure you're getting the best deal for your investment. We integrate core return management, low-cost shipping, warranty management and engine financing on all the Continental® aircraft engines for sale in our inventory.

Air Power Inc. maintains a trained team of Continental® engine and Continental® engine parts specialists to assist you in all things Continental®. With over 100 years of combined experience, our specialists are experts on every Continental® aircraft engine for sale in our inventory. Whether you have questions regarding the intricacies of engine adaptation to a particular airframe or need more information about available customizations for your airframe and Continental® engine combination, the team at Air Power Inc. is here for you.

We Have Continental® Engines for Sale in Four Series Builds

We're confident we have Continental® aircraft engines for sale to meet your general aviation aircraft's power and performance requirements. We carry four different Continental® engine series builds ranging from 100 to 375 HP, straight from the factory in Mobile, Alabama. Take a closer look at our series build offerings and their unique Continental® engine specs below.

What Are The Continental® Engines That Air Power, Inc. Offers?

Our complete Continental® engine list includes 28 unique engines. As mentioned, we separate series builds based on their Continental® engine specs. We can then divide series builds by variants that feature more refined Continental® aircraft engine specifications. For example, within the Continental® IO-360 engine build, you can choose a Continental® IO-360-C. This variant offers 210 HP at 2800 RPM, takes a minimum fuel grade of 100 or 100LL AVgas, uses a TCM 639231A3 fuel injector, includes accessory drive provisions and has two 6th-order dampers on the crankshaft. You could also choose a Continental® TSIO-360-LB, which features a larger throttle body and induction elbows, a relocated overboost valve, magneto pressurization and an exhaust muffler. The full Continental® engines list includes:

Frequently Asked Questions: Continental® Aircraft Engines

We understand shopping for Continental® aircraft engines online can be a nerve-wracking experience – a lot rides on getting the perfect engine for your aircraft. We pride ourselves on being an engine distributor that aircraft owners and their mechanics trust, which is why we offer complete transparency in all our operations. Here are some of the most commonly asked questions about Continental® aircraft engines.


How Much Does a Continental® Engine Overhaul Cost?

We can only accurately price a Continental® engine overhaul once we know your specific series build and variant. The cost of a Continental® engine's overhaul varies by product.


What Type of Continental® Aircraft Engine Parts Do You Sell?

Continental® engine parts for sale at Air Power Inc. include:

  • Cylinder & Valve Assemblies
  • Seat Valves
  • Washers
  • Gaskets
  • Bearings
  • Tubes
  • Springs
  • Riser Assemblies
  • & More

What Is Your Core Return Policy for Continental® Engines?

As a certified distributor for Continental Aerospace Technologies™, Air Power Inc. must mirror its core return policy. If you need to return Continental® aircraft engines, please adhere to the following:

  • Returned Continental® engines must be sent directly to Continental Aerospace Technologiesâ„¢ and be identified with the distributor's name (Air Power Inc.), returned goods authorization number and engine core invoice number; the logbook entry for the aircraft from which your engine was removed must also be included.
  • If returned Continental® aircraft engines are determined to have missing parts, Continental Aerospace Technologiesâ„¢ may accept the engine and reduce the applicable engine credit by the listed price for any missing part(s) at the time of engine receipt.
  • Any Continental® aircraft engines returned to Continental Aerospace Technologiesâ„¢ that are damaged or worn beyond economical repair shall be subjected to reduced engine core credit or rejection.

Continental® Rebuilt vs. New Engines: Which Should You Buy?

There is little operational difference between new and rebuilt Continental® engines, so we recommend choosing whichever better suits your financial capabilities.


How Fast Will My Continental® Engine Be Shipped?

Air Power Inc. will provide customers with same-day shipping of in-stock Continental® aircraft engines if an order is received before 3 PM Central (US) time. Delivery dates depend on the shipping carrier, which Air Power reserves the right to choose unless otherwise specified by the customer.


What Type of Payment Is Accepted for Continental® Engines?

Continental® aircraft engines can only be paid for via wire transfer or business check drawn from a United States-based bank. Continental® engines must be paid for in full before shipment, regardless of the customer's account status.

When You Need Continental® Engines & Engine Parts, Look to Air Power Inc.

Air Power Inc. takes its status as the preferred provider for Continental® aircraft engines very seriously. It's our mission to offer Continental® engines for sale at the lowest possible price to every one of our customers. But more importantly, we strive to build long-term relationships with our customers based on trust, technical expertise and service excellence. Shop Air Power Inc. for Continental® engines today. If you need to talk with a Continental® engine sales expert about specifics, feel free to contact us anytime. We're ready to answer any questions and provide you with more information to ensure your satisfaction.


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