Operator`s manual

Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 19
Operator's Manual
CS4518 Chainsaws
CARBURETOR
Never tamper with the factory setting of the carburetor.
SAW CHAIN TENSION MAINTENANCE
Keeping the saw chain at the proper tension is necessary for
safe operation and will help prolong the life of the saw chain
and the guide bar.
1. Shut the power unit o and allow the saw to cool.
2. The saw chain should not hang down from the bottom edge
of the guide bar.
3. Wearing protective gloves, hold the guide bar with one hand
and pinch the chain with the free hand.
4. Pull down on the chain. It should pull away from the bar, but
the drive links should not disengage the groove around the
perimeter of the guide bar.
5. Add or remove tension as needed.
6. Hold up on the guide bar nose and tighten the bar nuts with
the Scwrench.
Add tension at the beginning of every work session.
Check tension at every re-fueling.
Remove tension at the end of every work session.
SAW CHAIN MAINTENANCE
Keeping the saw chain sharp is a critical component to operating
a chainsaw. A dull saw chain will drastically reduce cutting
eciency and can pose certain safety hazards.
• Avoidunintentionallystrikingforeignobjects.Thiscancause
a kickback, but will also reduce the sharpness or permanently
damage the saw chain.
• Avoidcuttingwoodthathasbeendrugontheground.Sand,
dirt, and mud stuck to the log will dull the saw chain.
• Avoidcuttingwoodthatmaycontainmetalsuch as nails,
staples, or wire.
• Avoidcuttingallthewaythroughwhenbuckingalog.This
could allow the chain to come into contact with the soil below,
dulling the saw chain.
Sharpening Saw Chain Cutters (Teeth)
The saw chain included with this saw is a 91VG Chamfer Chisel™ or
91P Chamfer Chisel™ and requires a 5/32 inch round le (included
in the original packaging).
When to have your saw chain sharpened:
• Sawdustbecomespowder-like
• Youneedtoforcethesawintothecut
• Thesawtendstocutthroughatanangleinsteadofmakinga
straight cut
• Vibrationincreases
• Fuelconsumptionincreases
Always inspect your saw chain prior to sharpening. Check for
the following:
• Bentorburreddrivelinks
• Brokencuttersortie-straps
• Looserivetsorbrokenrivetheads
If broken components are found, discard the chain immediately.
To properly sharpen you saw chain:
1. Be sure to have the correct size le and le guide.
2. When hand ling it’s important that 1/5, or 20 percent, of the
le’s diameter is always held above the cutter’s top plate.
3. Keep the correct top-plate ling angle line on your le guide
parallel with the chain.
4. Sharpen all cutters on one side of the chain rst. Sharpen
by ling from the inside of each cutter to the outside. After
sharpening the rst side, turn the saw around and repeat the
process for cutters on the other side of the chain.
5. If the chrome surface of the top or side plates is damaged, le
back until such damage is removed.
6. Keep all cutters at an equal length. Begin ling on the cutter
with the most damage, and le all subsequent cutters to the
same length.
7. DO NOT alter or le the tops of bumper tie strap links (between
each cutter) on the 91VG chain.
8. FileONLYonthe“Push”stroke,donotpulltheleagainstany
metal object as this will damage the le.
It is also important to maintain the depth gauge setting
throughout the lifespan of the saw chain. 91VG and 91P chains
useadepthsettingof.025”.Thissettingshouldbecheckedand
corrected every third or fourth time the saw chain is sharpened.
1. Place the correct depth-gauge tool over the chain, with one
depth gauge protruding through the slot in the tool.
2. If the depth gauge extends above the slot, use a at le to bring
the depth gauge ush with the top of the tool. Use only the
push stroke of the le. Pulling the le will damage the le.
3. Make sure to round over the leading edge of the depth gauge
to prevent kickbacks and tie strap breakage.