Yanmar 6LY2A-STP is a marine gear designed to increase torque and reduce the rotational speed (RPM) of the engine, making it ideal for use with propellers that require more torque at lower RPMs. This is often the case for larger or heavier boats that require more power to move through the water.

Yanmar 6LY2A-STP is also equipped with a trolling valve, which allows the operator to reduce the RPMs even further, making it ideal for slow-speed trolling or maneuvering in tight spaces. Additionally, it features a built-in oil cooler, which helps to maintain the optimal operating temperature of the gear, even under heavy loads.