Convert your Cessna 170, 172 or 175 series aircraft to…

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The "Cessna 220"™ FRANKLIN conversion offers a First-Class solution when considering upgrading the powerplant in your Cessna. STC approved upgrade kits are now available from Franklin Aircraft Engines, Inc. to install an astonishing 220 horsepower in your Cessna 170, 172 or 175 series aircraft.

Here's the extra boost your Cessna needs to make a solid airplane even better. The spectacular Performance will make your Cessna more fun to fly, provide greater 4-place utility and increase the re-sale value of your Cessna.

The combination of unmatched horsepower and a Constant Speed Propeller means impressive top speed, unbelievable take-off and remarkable rate of climb.

Just as important, The FRANKLIN engine delivers 6 cylinder, low r.p.m. smoothness that is hard to believe until you have actually flown behind it! In addition, the conversion includes the installation of a high amperage alternator and a vacuum pump may be installed as an option with no special drive requirements.

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The "Cessna 220" FRANKLIN conversion consists of changing out the engine, propeller, engine mount, exhaust system, oil cooler, ducting and cooling baffles. A manifold pressure gauge and propeller control cable is added to the panel. Some Cessna models will require a battery relocation kit and some will require a fuel line upgrade kit. In addition, some engine controls and monitoring instruments may need changed out to match the operating limits of the new powerplant.

The intake and exhaust systems have been engineered on the basis of dynamometer tests to produce maximum h.p. at the propeller. Exhaust systems feature dual high output heaters. One provides cabin comfort at coldest temperatures; the other is for carburetor deicing under adverse weather conditions. Exhaust stacks face aft to augment exhaust gas flow, reduce drag and keep your cowling looking clean.

You may also enjoy the benefits of a gross weight increase made available for certain model Cessna aircraft.

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Low level engine vibration permits extremely compact, near-solid engine mounting and closer fitting cowling. Only minor cowling modifications are required to install the FRANKLIN 220. Other engine conversions may require adding unsightly blisters to the cowling to provide adequate engine clearance.

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The FRANKLIN powerplant is one of the most durable certified aircraft engines flying today. The 220 h.p. FRANKLIN is essentially the same power section as the famous 335 c.i. FRANKLIN used in Bell and Hiller helicopters. These were designed to operate at a continuous full throttle 3200 r.p.m. and turbocharged to 41" M.P. to produce 260 h.p! The FRANKLIN 220 develops maximum h.p. at only 2800 r.p.m.



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On your first flight, your "Cessna 220" will reveal that it is All Business…

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Truly a spectacular 4-place performer on land or sea.

"Why settle for less Horsepower !"

(Performance chart based on Aircraft at gross weight)

Franklin 6A-350-C
220 HP
Max. Level Speed
(at 7000') (MPH)
Max. Cruise Speed
(at 7000') (MPH)
Max. Rate of Climb
(Sea Level) (Ft./Min)
Service Ceiling
Take-of Run
Cessna 170 A&B Land 170--- 158--- 1,500- 18,000 300--- 500
Cessna 172 thru P Land 167--- 156--- 1,400-- 18,000 300--- 600
Cessna 172 D-P Float* 145--- 156--- 1,400 16,000 1,050- 475
Cessna 175 Land 167--- 156--- 1,400 18,000 300-- 600

*Max Gross Weight of 2499 lbs. for 172D-P for operation on wheels or floats.



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Considering Floats for your Cessna ? No Problem !

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Franklin Aircraft Engines, Inc. can provide you with STC approved paperwork to install Floats on some Cessna models with a gross weight increase as an added bonus !


The overall cost of the conversion can range from the low $20's to the mid $30's. The low end can be achieved by locating a mid-time or overhauled engine, propeller and accessories. If you choose to install all new components you will reach the high end of the expense range. Keep in mind, when you convert to the FRANKLIN 220, you have your old firewall forward package to sell and can apply that sale towards purchasing your ultimate upgrade.

As a comparison to overhauling your existing engine, you may spend $13K to $15K to rebuild your existing Continental O-300 or Lycoming O-320 and over $20K for a Continental GO-300 overhaul. Even after the engine overhaul expense, you may spend more money in repairing or rebuilding your old propeller, exhaust system, engine mount, cooling baffles, oil cooler, carburetor heat box, accessories, oil/fuel hoses, etc…

Even after all the expense of overhauling your existing powerplant, you won't see much of a gain in performance and will only increase the re-sale of your airplane by about 10%. In comparison, many Cessna owners claim over a 50% increase in their airplane re-sale value after converting to the "Cessna 220".

The basic STC approved installation kit is available directly from Franklin Aircraft Engines, Inc. which includes the STC Paperwork and Installation Instructions, a new engine mount, new exhaust system, new carburetor heat box, new oil cooler, new brackets and other miscellaneous items. The goal here is to provide the installer with components that require special fabrication procedures, inspection processes and manufacturing equipment. Other items such as oil hoses, scat hose,clamps, etc… are readily available from many different suppliers.

If you are considering upgrading the powerplant in your Cessna… the "Cessna 220" FRANKLIN upgrade will offer you a first class solution, provide unmatched performance and all at a sensible cost.

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