New old stock, factory-original Twin Disc service manual for the Model MG-540 marine gear/transmission. This is an authentic Twin Disc publication obtained directly from the factory by a former Twin Disc employee. It has never been used.

Manufacturer: Twin Disc Incorporated
Model: MG-540
Manual number: SM-162
Revision: C
Publication date: March 1982
Format: Factory spiral-bound paper manual

Contains factory service, maintenance, troubleshooting, repair, disassembly, assembly, technical illustration, specification, and parts information for the MG-540 marine gear.

This is an original vintage factory manual—not a photocopy, modern reprint, PDF, or digital download. It may display minor storage wear consistent with its age. Please examine all photographs for exact condition and confirm compatibility with your equipment before purchasing.