The focus is a specific outboard motor model produced by Mercury Marine. This particular engine is a 150 horsepower variant, designated with the “XR4” code and part of the “Black Max” series, indicating a specific performance and aesthetic package within the Mercury product line. As an example, this engine might be found powering smaller to mid-sized recreational boats requiring substantial thrust.
This model represented a significant offering in its time, providing a balance of power and reliability for boating enthusiasts. Its benefits included robust performance, a reputation for durability, and a relatively simple design that facilitated maintenance. Historically, the “Black Max” series was known for its distinctive styling and represented a popular choice for those seeking enhanced performance from their outboard motor.