ASSEMBLY 99944200553
14 X7702093407
© 1/2017 ECHO Inc.
3. Remove gear housing locater 
screw (A) with 4 mm hex 
wrench.
4. Loosen gear housing mounting 
bolt (B) with 5 mm hex wrench.
5. Position lower drive shaft (end 
without serial number decal) 
into gear housing shaft mount.
6. Align hole in drive shaft housing 
(C) with gear housing shaft hole 
(D) and seat lower drive shaft 
end into gear housing shaft 
mount. Install and tighten the 
gear housing locater screw.
7. Tighten the gear housing 
mounting bolt.
Power Head Shaft/Lower Shaft Assembly
Do not perform maintenance or assembly procedures with 
engine running.
1. Set Power Head/Shaft Assembly on a level surface.
2. Pull locater pin (A) out, and turn counter-clockwise 1/4 
turn to lock-out position.
3. Remove vinyl cap from attachment drive shaft.
4. Remove cardboard spacer, if necessary.
Note: Your coupler may appear different than 
coupler shown.
Parts Required: PAS or SRM-SB Power Head w/Shaft & Coupling