The copperhead (Agkistrodon contortrix) is a member of the pit viper family, like most of the venomous snakes in North America. The copperhead (Agkistrodon contortrix) is a member of the pit viper family, like most of the venomous snakes in North America.
The Command Thrust models use the same bigger gearcase housing as the Mercury 150 FourStroke, but with an all-new 2.38:1 ratio ideally suited for pontoons and heavier boats. Itâs the first true oversized gearcase in the industry for outboards in this horsepower range.
The powertrain or engine control module is a powerful computer that manages the engineâs ignition, fuel injection, and emission systems. In some vehicles, it may also control the operation of the automatic transmission and the anti-lock brake system.Symptoms of Wear or Failure. A PCM can be mistakenly replaced when there was actually a defective engine sensor that was overlooked in the initial diagnosis. 2  The terms PCM and ECM/U (engine control module/unit) are commonly used interchangeably.