page_title: Continental O-300
section_title: Development
hierarchical_section_title: Continental O-300 / Development
caption_attribution_description: English: Field maintenance is conducted on a Cessna 172.
context_page_description: The Continental O-300 and the C145 are a family of air-cooled flat-6 aircraft piston engines built by Teledyne Continental Motors.
  First produced in 1947, versions were still in production as of 2004. It was produced under licence in the United Kingdom by Rolls-Royce in the 1960s.
context_section_description: The C-145 was developed from the 125 hp (93 kW) C-125 engine. Both powerplants share the same crankcase, although the C-145 produces an additional 20 hp (15 kW) through a longer piston stroke, higher compression ratio of 7.0:1 and different carburetor jetting.
  The O-300 is a modernized C-145 and retains the same weight, dimensions, bore, stroke, compression ratio, displacement and output power of the earlier engine.
caption: Continental O-300 engine installation in a Cessna 172
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