TM 9-2815-250-24&P3-11. CAMSHAFT REPAIR (continued).2.Install new O-ring (27) on acceleration lever (26). Install acceleration lever (26) on upper crankcase (15).3.Install new retaining ring (28) on acceleration lever (26).4.Install four tappets (25) in upper crankcase (15).5.Install washer (17) and spacer (18) on camshaft (16). Make sure tapered end of spacer (18) is facing away fromwasher (17).6.Install new retaining ring (22) in groove on camshaft (16).3-43