Lubricant supply for internal combustion engine

An induction system for a four-cycle, marine propulsion, internal combustion engine having a combustion chamber defined by a cylinder head, a cylinder block forming a cylinder bore, and a piston reciprocating in said cylinder bore, an intake passage including a poppet-type intake valve formed in said cylinder said for controlling the admission of an intake charge to said combustion chamber, an exhaust passage formed in said cylinder head at a side thereof opposite said intake passage, a poppet-type exhaust valve supported for reciprocation within said cylinder head for controlling the opening and closing of the communication of said exhaust passage with said combustion chamber, an induction system forming an induction passage for supplying a charge to said intake passage of said cylinder head, at least one butterfly-type flow control valve for controlling the flow through said induction passage, and a lubricant supply system including means for delivering lubricant from a lubricant reservoir to said induction passage upstream of said butterfly type flow control valve and in proximity to a supporting throttle valve shaft therefor for delivering lubricant to said intake valve and through said combustion chamber to said exhaust valve, and a lubricant supply system for circulating lubricant to said engine for its lubrication during its running.