33FS 500, FS 550
English / USA
To reduce the risk of fire and burn 
injury, use only spark plugs 
authorized by STIHL. Always press 
spark plug boot (2) snugly onto 
spark plug terminal (1) of the proper 
size. (Note: If terminal has 
detachable SAE adapter nut, it must 
be attached.) 
A loose connection between spark 
plug boot and ignition wire 
connector in the boot may create 
arcing that could ignite combustible 
fumes and cause a fire.
Replacing a Broken Starter Rope
: Remove the screws (1) and lift away 
the starter cover.
: Remove the spring clip (2).
: Carefully remove the rope rotor with 
washer (3) and pawl (4).
The rewind spring may pop out and 
uncoil during this operation. Take 
care to avoid injury!
: Pry the cap (5) out of the starter 
grip. 
: Remove remaining rope from the 
rotor and grip.
: Tie a simple overhand knot in the 
new rope – see "Specifications" – 
and then thread it through the top of 
the grip and the rope bush (6).
: Refit the cap in the grip.
00BA036 TR
1
Replacing the Starter Rope 
and Rewind Spring
1
1 1
1
398BA027 KN
3
2
4
398BA028 KN
398BA000 ST
6
5