From inside (document excerpt):
PARTS LIST NO. DATE 545103416 Replaces 545103416 — 3/07/07 PARTS LIST Note: Illustration may differ from actual model due to design changes CHAIN SAW MODEL(s) 333 PAGE NO. 3/04/08 1 28 42 41 39 40 WARNING 38 37 All repairs, adjustments and maintenance not 27 26 36 35 described in the Operator’s Manual must be 34 performed by qualified service personnel.