In conducting a search for float hatches I came across an STC SA155NW for the A185F from:

Art's Aircraft Parts and Repair
P.O. Box 2175
Kirkland WA 98083.

Googled but no joy!

Does anyone have a phone # or know if Art's still exists.

The STC references Instruction #102.
Does anybody have a copy?

Thanks for your help.

Have you tried Kenmore who now owns Edo?

http://www.kenmoreairharbor.com/edo-floats.html

They may have the STC if the original owner is gone.

TD

Kenmore is supposedy working on an stc but they didn't know when it would happen.

Give a call to the Renton FSDO. They can help you get in touch with him.
John