12 X77702093405© 08/2013 ECHO Inc.ASSEMBLY 999442005533. Remove cardboard spacer from coupler, if necessary.4. Carefully fit attachment drive shaft assembly into coupler (B)to decal assembly line (C), making sure that the inner lowerdrive shaft engages upper drive shaft mount.Note: Short couplings fit flush to decal point (F). Long couplingsare 4-3/4 in. long, and fit flush to line (C).5. Rotate locator pin (A) 1/4 turn clockwise to engage lowershaft hole. Insure locator pin is fully engaged by twistinglower drive shaft. Locator pin should snap flush in coupler.Full engagement will prevent further shaft rotation.6. Secure lower shaft assembly to coupler by tighteningclamping knob (D).CEFCD