STAINLESS STEEL BUSHING 646-44322-00

Function and technical context

This stainless steel bushing is part of the fastening and alignment systems in marine propulsion engines. Its function is to serve as a containment and guiding element in the transmission and coupling assemblies, guaranteeing the geometric precision necessary for the transfer of power between the engine and propeller. Located in the engine block or transmission couplings, it acts as a critical positioning piece that prevents misalignments that could cause vibrations, premature bearing wear and loss of propulsive efficiency. Its stainless steel construction makes it resistant to marine corrosion and saltwater environments, significantly extending its useful life compared to conventional materials.

When to replace this part?

Symptoms of bushing wear include abnormal vibrations during navigation, lateral movements in the drive shaft, metallic noise coming from the coupling area and, in advanced cases, loss of alignment that affects maneuverability. It is recommended to inspect this component at each seasonal inspection, especially after crossings in water with sediment or in conditions of prolonged effort. The preventive replacement of worn bushings avoids cascading damage to bearings and crankshafts, high-cost repairs that can leave the boat immobilized.

Equivalent manufacturer part numbers