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Franklin 6AC-298/ O-300

The Engine Specifications
In 1941, Franklin introduced four new engines based on a 4.25 x 3.5 inch cylinder.  These engines were the 4-cylinder 4AC-199, the 6-cylinder 6AC-298, the 8-cylinder 8AC-398 and the 12-cylinder 12AC-596.

The U.S. military gave the 6AC-298 the designation O-300.  Production ended in 1945.  A later Continental engine received the same designation.

6-cylinder, horizontally-opposed, air-cooled piston engine
Displacement: 298 cubic inches (4.9 liters)
Bore x stroke: 4.25 x 3.5 inches
Models Used by
O-300-11: 150 hp (112 kW)
Culver PQ-14 Cadet
Related Pages
more about Franklin

page updated 22 June 2003



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Kenneth W Shanaberger 2000 - 2010