1972 Ski-Doo Shop Manual, Page 160Get this manual
REWIND STARTER
9Remove the spring from the casing :;:r-:"!;J(
6Take the rope sheave in one hand and slide the end of the starter rope into the hole located between sheave rims and up through sheave hub7With approximately 1-14 inches of rope protruding through the sheave hub, form "u" shape with the rope end and position the small jam pin within the "u" (fig2-5-6)