TRANSMISSION SHAFT 57100-93902 REC57100-93902

Function and technical context

The transmission shaft 57100-93902 is the mechanical element responsible for transferring torque from the reduction box to the propeller in small displacement Suzuki outboard engines. It works within the lower drive system, subjected to continuous torque, vibration and exposure to salt or fresh water depending on the navigation environment. Its integrity is decisive to guarantee that the power generated by the engine is translated into effective propulsion; A damaged, bent shaft or with worn keyways causes an immediate loss of thrust and can cause serious damage to the motor foot gears. The manufacturer reference has been updated to 57100-90L00, which replaces the previous numbers 57100-93900 and 57100-93902, guaranteeing total interchangeability with previous parts.

When to replace this part?

The most common symptoms of a damaged drive shaft are abnormal vibration in the propeller, metallic noise in the engine base at different revolutions, loss of traction or free rotation of the propeller without propulsion. In environments with sand or sediment, wear of the keyways and shaft ends is noticeably accelerated. It is recommended to inspect the drive shaft at each gearbox inspection or when replacing the oil in the lower unit - usually every season or every 100 hours of navigation - and replace it preventively at the slightest sign of looseness or corrosion, since a failure at sea can leave the boat without propulsion.