YAMAHA TAIL 68D-65300-11-4D

Function and technical context

The tail or stern unit is the mechanical assembly responsible for transmitting power from the engine to the propeller in outboard engines. It integrates the gearbox, drive shafts and steering systems, allowing the rotation of the crankshaft to be transformed into the propulsion movement of the boat. This component works in extreme conditions of exposure to salt water, constant vibrations and variable loads, being critical for the maneuverability and performance of the vessel. A failure in the tail directly affects the navigation and control ability of the boat.

When to replace this part?

Symptoms of tail wear include abnormal vibrations at the stern, difficulty shifting gears, loss of traction, or erratic movement of the propeller. Although there is no fixed maintenance interval, it is advisable to inspect the structural integrity and condition of the internal seals during each seasonal inspection, especially if the boat frequently navigates salt water or performs extreme load maneuvers. The preventive replacement of this unit avoids sudden breakdowns in navigation and costly repairs in the workshop.

Equivalent manufacturer part numbers