ENGINE FOR OUTBOARD ENGINE SYSTEM

摘要

A cylinder head is coupled to a cylinder block/cylinder head coupling surface of a cylinder block by ten bolts which are disposed to surround outer peripheries of cylinders. In order to enhance sealability of an opening of an oil passage defined radially outside the bolts as viewed from the cylinders, the cylinder block and the cylinder head are further fastened to each other by two bolts disposed in the vicinity of the opening Thus, the fastening force of the cylinder block/cylinder head coupling surface can be increased to increase the degree of freedom in design of the opening of the oil passage defined in the coupling surface.