Yamaha original equipment service manuals used by Yamaha service centers are available for users that are mechanically inclined and have the ability and desire to perform repairs to their generator. These manuals are approximately 50 pages provided in an 8-1/2 x 11 format. Informationincludes specifications, flow charts, schematics, troubleshooting charts, torque settings, tolerances, line drawings, periodic inspections and adjustments.