Which engine is certified with the model 188B, serial number 8801823?

The engine certified with the model 188B, serial number 8801823, is indeed the Continental O-470-R. This engine is a six-cylinder, air-cooled, horizontally opposed engine commonly used in various general aviation aircraft, including the model 188B.

The O-470-R engine is known for its reliability and has been a popular choice for aircraft that require a robust powerplant. Its specifications and performance characteristics align with the operational requirements of the model 188B, particularly in terms of power output and compatibility with the aircraft's design.

In contrast, the other engine options listed may have differing specifications or uses, making them less suitable for the model 188B. For example, the O-470-S variant, while similar, has different operational characteristics and is not approved for the same type of aircraft as the O-470-R. The IO-520-D and the Lycoming IO-360 also belong to different engine families and have different performance profiles that do not match the needs of the model 188B, which is specifically designed for use with the Continental O-470-R engine. This understanding highlights the importance of matching engine specifications to aircraft requirements to ensure safety and performance.