Cessna 185

Cessna 185
Davis Aviation Services now offers the STC to convert your
Cessna 185 to the IO-550 with various propeller options!

Formerly known worldwide as the "Bonaire 550", this conversion provides for the upgrade to the IO-550 engine. With either the McCauley or the Hartzell propeller option, performance is phenomenal with shorter takeoff roll, increased rate of climb and faster cruise speeds.

Upgrade offered for Cessna 185 aircraft (serial # 0001 and subsequent) equipped with IO-470 or IO-520 engine.
STC does not require engine mount change.

Davis Aviation offers Hartzell three blade and McCauley three blade propeller upgrades for the Cessna 185 to accompany your existing IO-520 engine. The remainder of the IO-550 upgrade can be purchased, as you approach TBO, to complete the performance modification.

Call for more details and pricing!

IO-550 Conversion Improvements

15% more HP at crusie.
Quieter operation: the noise level at 2700 RPM is greatly reduced.
10-12 mph additional cruise speed with the "Black Mac" or the "Top Prop".
15-20 mph additional cruise speed with the new Hartzell "Scimitar" prop.
10%-20% better rate of climb at gross.
Continuous 300 HP without limitation.
Short field take-off 10%-20% less at full gross weight.
Float plane take-off run reduced 20%-30%.

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Davis Aviation Services
550 Engine and Propeller Conversion Specialists
P O Box 192 | Bristol, TN 37625
Telephone: 423-652-1113 | Fax 423-652-2503