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American Navion Society, Ltd.

American Navion Society, Ltd.

American Navion Society, Ltd.

American Navion Society, Ltd.

American Navion Society, Ltd.

American Navion Society, Ltd.

American Navion Society, Ltd.

American Navion Society, Ltd.

General

520 to 550
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Robert Delese
8/12/2026 11:40 AM

Looking to put IO- 550 into our Rangemaster

Currently has IO- 520 has anyone done this ? I know there is

An STC for it .

Thanks in advance

bobdelese@yahoo..com

570-236-4394

Trent Blake
8/25/2026 4:29 PM

I would reach out to Kevin at White Hawk Aviation in Culpeper, VA. He has been extremely helpful to me with my Navion and I know he has up-engined several Navions.

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