Operation Manual
23
CS-310
End of the guide bar may be placed at the 
height of about 55 cm (22 in.).
55 cm
(22 in.)
AUTOMATIC CHAIN BRAKE
Kickback produced from the tip of the guide bar will 
trip the automatic chain brake. To make sure that 
the automatic chain brake operates properly, follow 
these steps: 
1. Stop the engine. 
2. Hold the saw with the guide bar approximately 
55 cm (22 in.) above a wooden surface. Right 
hand should hold the rear handle, and left hand 
should hold the front handle. 
3. Release the front handle and drop the end of the 
guide bar against the wooden surface. 
4. The impact should lock the chain brake.
IMPORTANT
When checking the operation of the automatic 
chain brake, use a soft surface substance like 
wood to provide the impact so the chain is not 
damaged.
WINTER OPERATION
Use the winter plug to prevent carburetor trouble in 
winter.
•  Release the cylinder cover latches and remove 
cylinder cover. Remove plug from warm weather 
position, and install into cold weather “storage” 
position.
NOTE
For operation at normal temperature return the 
plug to its original place. (5°C, 41°F)     
It causes over heating of the engine. 
Rear handle should be gripped lightly with the 
right hand.
Plug
Cylinder 
cover
Warm weather 
position
Cold weather 
“storage” position










