YANMAR ZT370 Stern drive Designed, built and proven by Yanmar, the all-new ZT370e stern drive is the perfect transmission match for the BY2 , LP and 8LV series diesel engines, unsurpassed for new installations and ideal for re-powering smaller and medium boats. This quiet, hydrodynamic stern drive has a new type of hydraulic clutch for exceptional smoothness, precision forged gears for extra-long life , two counter-rotating propellers for superb acceleration and tight-hold tracking and large rudder dimensions for superior handling, regardless your boat is single or twin installation. Hydraulic clutch for smoof engagement. Electro Magnetic Shift Precision-forged gears for long life. Reduction ratio: 1.78, ready to go.