COLLAR SHAFT 19mm.

Function and technical context

The 19 mm shaft collar is a transmission component that is responsible for axially fixing the tail shaft or propulsion shaft, preventing its longitudinal displacement during the operation of the outboard or inboard motor. It works within the power transmission system, acting as a retention and support element between the shaft and the corresponding casing or housing. Its correct fastening is essential to maintain the alignment of the shaft with the propeller and avoid vibrations, looseness and premature wear in adjacent components. A damaged collar or one with excessive play can cause damage to the sealing seals, entry of salt water into the engine and progressive loss of efficiency in thrust transmission.

When to replace this part?

The most common symptoms of wear on a shaft collar include abnormal vibrations in the drive line, clunking or rattling when accelerating, and noticeable axial movement in the propeller shaft. It is recommended to inspect the collar during each seasonal maintenance, especially if the boat operates in sedimentary waters or under highly demanding conditions. Replacing it proactively when any visible play is detected is the best way to avoid more costly shaft, seal or transmission housing failures.

Compatibility table