The chamber has a combustion chamber wall (29) at which combustion chamber shingles (30) are fixed by a bolt (31). A percussion cooling hole (32) is formed in a fastening region of the bolt in the wall, where a central axis (33) of the hole is inclined tow...

There is provided a packaged engine working machine including, in a lower space of a package in which an engine is disposed, an electrical component storage box adapted so to be impervious to heat from the engine and intrusion of dust or the like. In a pac...