Crankshaft

A crankshaft assembly having an axis of rotation, comprising:

• a main throw having a web, a main pin extending from the web that is coaxial with the axis of rotation and an aperture in the web;
• a crank throw having a web, a crank pin extending from the web, a central aperture positioned in the web that is coaxial with the axis of rotation, the crank pin positioned in the aperture of the main throw;
• a connecting rod positioned on the crank pin and including a connecting rod bearing positioned about a bearing surface of the crank pin;
• a first set of thrust washers positioned on the crank pin on a first side of the connecting rod, the first set of washers including a first inner thrust washer coaxially positioned within a first outer thrust washer;
• and
• a second set of thrust washers positioned on the crank pin on a second side of the connecting rod opposite the first side, the second set of washers including a second inner thrust washer coaxially positioned within a second outer thrust washer,
• wherein the main throw includes an annular recess surrounding the aperture on a side of the web opposite the main pin, wherein the first set of thrust washers are positioned in the annular recess, and the first outer thrust washer is arranged in contact with the connecting rod.