EXTRACTOR 91-31229 REC91-31229

Function and technical context

The 91-31229 Puller is a specialized shop tool designed for the safe removal of shafts and internal components in MerCruiser and OMC marine engine transmissions and tailstocks. It works on the propulsion system, specifically on the sterndrive assembly, where it allows the removal of axles, bearings and coupling elements without applying uncontrolled forces that could damage the precision machined surfaces. Its use is essential in interventions on the Alpha One, Bravo One, Bravo Two, Bravo Three series and their high-performance variants, since these sets have narrow tolerance settings that do not tolerate improvised extraction methods. Failure to use this tool during disassembly can cause scratches in housings, deformations in shafts or the unusability of components that would otherwise be reusable, considerably increasing the cost of the repair.

When to use this extractor?

This extractor should be used whenever disassembly work is carried out on the stern-drive tailpiece that involves the removal of transmission shafts, needle bearings or coupling bushings, especially during seasonal inspections, seal changes or after detection of play or abnormal vibration in the propulsion line. In marine transmissions subjected to intensive use, it is recommended to check the condition of the shafts and bearings at each annual maintenance or every 200-300 hours of navigation, this extractor being the appropriate tool to undertake this inspection without risk. Having the right tool the first time prevents secondary damage that can turn a routine check into a high-cost repair, especially on high-performance Bravo XR and Bravo X models.

Mercury/MerCruiser

Equivalent manufacturer part numbers