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 bearing is designed for a unit thrust of 300 psi and a propeller thrust of 255,000 pounds which corresponds to 18,500 shaft horsepower. Lubrication of the thrust bearing is from the main lubricating oil system. The main thrust bearing is of the Kingsbury thrust type. It is composed of eight thrust shoes on each side of the thrust collar; which is an integral part of the thrust shaft. The thrust bearing is flooded with lubricating oil to provide lubrication for all its surfaces.