Power transmission device of engine

A power transmission device of an engine comprising:

• an output shaft of a gear-type transmission unit which is provided in parallel with a crank shaft of the engine and provided with a driving bevel gear at one end thereof, a driving force from the crank shaft being transmitted to the output shaft;
• a drive shaft placed in a direction orthogonal to the output shaft and provided with a driven bevel gear which meshes with the driving bevel gear;
• a gear case formed integrally with a crank case for accommodating the gear-type transmission unit and supporting a shaft situated in a previous stage of the output shaft at both ends of the shaft;
• a lid member;
• a first support member;
• a first shim;
• a second support member;
• and
• a second shim;
• wherein
• an opening is formed in the gear case to allow the output shaft to be pulled out of the gear case in a direction from the one end of the output shaft toward the other end thereof,
• the lid member is removably attached to the gear case such that it closes the opening,
• the first support member is removably attached to the gear case for rotatably supporting the output shaft,
• the first shim is interposed between the first support member and the gear case,
• the second support member is removably attached to the gear case for rotatably supporting the drive shaft, and
• the second shim is interposed between the second support member and the gear case.