Engine unit support structure and method for mounting engine unit

A method for mounting an engine unit to constitute an engine unit support structure, the engine unit support structure comprising:

• an engine unit having a three-cylinder engine;
• a mount for mounting the engine unit;
• and
• a plurality of elastic support bodies coupled to the engine unit and the mount to support the engine unit,
• wherein the plurality of elastic support bodies include a plurality of first elastic support bodies and a plurality of second elastic support bodies,
• wherein the second elastic support bodies are so disposed as to be orthogonal to a pitching rotation central axis of the engine unit and astride a virtual plane including a rolling rotation central axis of the engine unit, and the first elastic support bodies are disposed in a position closer to the pitching rotation central axis than the second elastic support bodies and astride the virtual plane, and
• wherein a distributed load of the engine unit to be borne by each of the first elastic support bodies is greater than a distributed load of the engine unit to be borne by each of the second elastic support bodies, said method comprising:
• providing the first elastic support bodies and the second elastic support bodies in such positions that a load of the engine unit is borne first by the first elastic support bodies then by the second elastic support bodies when coupling the engine unit to the first elastic support bodies and the second elastic support bodies coupled to a mount from above the first elastic support bodies and the second elastic support bodies;
• and then
• coupling the engine unit and the first elastic support bodies together and coupling the engine unit and the second elastic support bodies together such that the load of the engine unit is borne by the first elastic support bodies and the second elastic support bodied in a distributed manner.