Patent ID: 6918369

Claim:
An internal combustion engine comprising an engine body defining first and second bearing sections, a crankshaft journaled at the first bearing section for rotation about a first axis extending generally vertically, a balancer shaft journaled at the second bearing section for rotation about a second axis extending generally parallel to the first axis, the crankshaft rotating the balancer shaft, the balancer shaft having at least one balancer weight, and a lubrication system arranged to deliver lubricant to the first and second bearing sections, the first bearing section comprising an uppermost bearing portion and at least one lower bearing portion spaced apart vertically from the uppermost bearing portion, the lubrication system defining a main gallery and a plurality of delivery passages coupled with the main gallery, a portion of the lubricant being delivered to the uppermost bearing portion through a first delivery passage, another portion of the lubricant being delivered to the second bearing section through the first delivery passage, the first delivery passage exclusively providing lubricant to the balancer shaft.