Stihl MS250 User Manual

6
REMOVING AND REPLACING TWO DIFFERENT SIZE BARS, SAW CHAINS, AND CHAIN
SPROCKETS ON A STIHL
®
MS 250 CHAINSAW
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INSTALL THE 1/8” CHAIN SPROCKET.
14. Locate the sprocket line sighting groove on
the chain 1/8” sprocket. Locate the worm gear pin
inside the crankshaft chamber on the saw.
15. Slide the 1/8” chain sprocket into the
crankshaft chamber while aligning the
sprocket line groove and the worm gear
pin. If the sprocket line groove and the
worm gear pin are not aligned the sprocket will
not go in the crankshaft chamber and will not seat
properly. Do not force. If chain sprocket does
not go in easily relocate the sighting on the
chain sprocket, relocate the adjusting pin and
repeat step 15.
LOCK THE SPROCKET WITH WASHER AND
C-CLIP REPLACE THE WASHER COVER.
16. Slide the washer bearing onto the post. Place
the C-clip over the washer and make sure the
open end is centered and touching the post.
Worm gear pin
location in
crankshaft
chamber.
TOP VIEW
Sprocket sighting
line slot location
on 1/8” chain
sprocket.
PERSPECTIVE VIEW

Stihl MS250 Specifications

General

Brand	Stihl
Model	MS250
Category	Chainsaw
Language	English