The Franklin 6A8 is an air cooled 6-cylinder boxer engine, produced by the Aircooled Motors Inc., in Syracuse in the state of New York. It has been used over the years on seaplanes and amphibian aircrafts, such as the Republic RC-3 Seabee and the Piaggio P.136.
Piaggio P.136 (amphibious aircraft for transport, patrol and rescue)
Republic RC-3 Seabee (amphibious light plane)
Waco Aristocraft Model W (light aircraft)