What type of engine is installed in the Arrow?

The Lycoming IO-360 engine is a four-cylinder, horizontally opposed engine known for its reliability and performance, making it a popular choice for many general aviation aircraft, including the Piper Arrow. The "I" in IO-360 designates it as an injected engine, meaning it uses fuel injection instead of the more traditional carburetor system, which leads to better fuel efficiency and overall performance.

This engine's design and configuration allow it to provide a good balance of power and weight, which is essential for the Arrow's performance characteristics such as its climb rate and cruise speed. Additionally, the Lycoming engines are well-regarded for their ease of maintenance and availability of parts, making them a reliable option for pilots and maintenance personnel.

The other choices involve different brands or variations of the O-360 that don't match the specifications of the Arrow. Aircraft engines are specific to models to ensure optimal performance and efficiency, and in this case, the Arrow is specifically equipped with the Lycoming IO-360, which suits its design and operational requirements.