McCulloch Mac 110 User manual

·''Wo-.
MAC 110/115/120/130/140
OWNER'S MANUAL
Aj®
•
© U.S.A. 1982 - McCULLOCH CORPORATION
PRINTED IN U.S.A.
215489

2
TABLE OF CONTENTS
IDENTIFICATION 3
SAFETY INSTRUCTIONS 4
GENERAL CUTTING INSTRUCTIONS 6
FUEL AND LUBRICATION 7
Fuel 7
Mixing Fuel 7
Chain Lubrication 7
Fuel Mixture Table 7
INSTALLATION INSTRUCTIONS 8
Guide Bar. Saw Chain and CHAIN BRAKE 8
OPERATING INSTRUCTIONS 10
CHAIN BRAKE Operation 10
Starting and Stopping 11
Carburetor Adjustment 12
Breaking in a New Engine 12
Storing a Chain Saw 12
Removal from Storage 13
MAINTENANCE 14
Spark Plug 14
Fuel Tank Vent 14
Air Filter 14
Starter Cover and Cooling Fins 14
Muffler or Spark Arrester and Exhaust Port 15
CHAIN BRAKE Maintenance 16
Sprocket, Clutch, and Clutch Drum 16
Automatic Oiler Adjustment 16
Guide Bar Maintenance 17
CHAIN MAINTENANCE 18
Chain Tension 18
New Chain Break-In 18
Chain Lubrication 18
Chain Sharpening 18
Lowering Depth Gauges 18
PREVENTIVE MAINTENANCE 19
ACCESSORIES 19
Spark Arrester Screens 19
Spike Kit 19
NOTE: Throughout this manual, a number circled in black
indicates the illustration which corresponds to the text where
the number appears.

IDENTIFICATION
A. Guide Bar
M. Ignition/Stop Switch
B.
Saw Chain
N. Throttle Latch
C.
Fuel Tank Cap
O. Carburetor Controls
D.
Manual Oiler Lever
P.
Cho15.e Lever
E.
Throttle Trigger
Q.
CHAIN BRAKE Lever/Handguard
F.
Rear Handle
R. Oil Tank Cap
G.
Spark Plug Cover
S. Saw Chain Tension
H.
Air Cleaner Cover
Adjustment Screw
J.
Front Handle
T. CHAIN BRAKE Retaining Nuts
K. Starter Cover
u. CHAIN BRAKE
L. Starter Handle
VM
uHler
W. Safety Trigger
The serial number is attached to the bottom of the .saw. Make
a record of the serial number for identification in case the saw
is lost or stolen and keep the record in a safe place.
3

• DULL or LOOSE CHAIN.
~~--=-~-..;....~
• CUTTING ABOVE SHOULDER' HEIGHT.
• INATTENTION in holding or guiding saw while
cutting.
USE DEVICES such as low kickback chain, CHAIN
BRAKES, and handguards which reduce the hazards
associated with kickback.
DON'T FELL A TREE during high or changing winds.
USE WEDGES TO HELP CONTROL FELLING and pre-{.;\
vent binding the bar and chain in the cut.
0
BE SURE OF YOUR FOOTING and pre-plan a safe exit
from a falling tree or limbs. (])
DO NOT SET A HOT SAW DOWN in areas where flam-
mable material is present.
SAFETY INSTRUCTIONS
• ~ l.
READ YOUR OWNER'S MANUAL AND ALL SUP-
PLEMENTS (if any enclosed) thoroughly before
operating your saw. CD
Operation of a chain saw should be restricted to
mature, properly instructed individuals. DO NOT
ATTEMPT OPERATIONS BEYOND YOUR CAPACITY
OR EXPERIENCE.
WEAR CLOSE FITTING AND PROTECTIVE WORK
CLOTHING that is made to give protection, such as
(A) safety hat, (B) safety shield, safety goggles or
safety glasses, (C) safety work shoes, (D) heavy
duty work gloves, and (E) good grade ear plugs or
sound barriers. ®
DON'T USE ANY OTHER FUEL than that recom-
mended in your Owner's Manual.
REFUEL IN A SAFE PLACE. OPEN FUEL CAP SLOWLY
to release any pressure which may have formed
in fuel tank. Do not start a saw where you fuel it,
move at least 10 feet (3 meters) from fueling area
before starting. ®
DO NOT OVERFILL or spill fuel. If fuel has been
spilled on the unit, be certain the saw has dried
before starting it. Do not refuel a hot saw - allow it
to cool off. ®
DON'T SMOKE while fueling or operating the saw.@
DON'T WORK ALONE.
START YOUR SAW WITHOUT HELP. Don't start a
saw on your leg or knee. Never operate a chain saw
when you are fatigued. ®
KEEP ALL PARTS of your body and clothing away
from the saw chain when starting or running the
engine. Before you start the engine, make sure the
saw chain is not contacting anything. ®
BEWARE OF KICKBACK! Hold saw firmly with both
hands when engine is running; use a firm grip with
thumbs and fingers encircling the chain saw
handles and watch carefully what you cut. Kickback
(saw jumps or jerks, up or backward) can be caused
by:
• STRIKING LIMBS or other objects accidentally
with the tip of the saw while the chain is moving.
• STRIKING METAL, cement, or other hard material
near the wood, or buried in the wood.
• RUNNING ENGINE SLOWLY at start of, or during
cut.
4

WE STRONGLY RECOMMEND you do not attempt to
operate the saw while IN A TREE, ON A LADDER or
ON ANY OTHER UNSTABLE SURFACE. If you elect
to do so, be advised that these positions are
EXTREMELY DANGEROUS. ®
DON'T CUT IN AWKWARD POSITIONS (off-balance,
out-stretched arms, one-handed, etc.).
WHEN CUTTING A LIMB THAT IS UNDER TENSION
be alert for springback so that you will not be struck
when the tension is released. ®
USE EXTREME CAUTION when cutting small size
brush and saplings because slender material may
catch the saw chain and be whipped toward you, or
pull you off balance. ®
VIBRATION - Avoid prolonged operation of your
chain saw and rest periodically, especially if your
hands or arms start to have a loss of feeling, swell or
become difficult to move. These conditions can
If ,M"' ~.
rJ '
~,
.j
reduce your ability to control a saw.
EXHAUST FUMES - Do not operate your chain saw
in confined or poorly vented areas.
OBSERVE ALL LOCAL FIRE PREVENTION REGULA-
TIONS. We recommend that you keep a fire
extinguisher and shovel close at hand whenever you
cut in areas where dry grass, leaves or other flam-
mable materials are present.
NOTE: Spark arrester screens are available for
installation in your muffler where fire regulations
require them. Check local regulations for your
-special requirements.
NEVER OPERATE YOUR CHAIN SAW WITHOUT A
MUFFLER.
DO NOT CARRY THE SAW BY THE CHAIN BRAKE
LEVER.
WHEN TRANSPORTING YOUR CHAIN SAW, use the
appropriate guide bar scabbard.
TURN OFF YOUR SAW WHEN MOVING BETweEN
CUTS and before setting it down. Always carry the
chain saw with the engine stopped, the guide bar
and saw chain to the rear, and the muffler away from
your body. @>
DON'T TOUCH or try to stop a moving chain with
your hand. @
DON'T ALLOW ANY OTHER PERSON or ANIMAL
CLOSE to a running saw or where a tree is being cut
down. @
/ DON'T TOUCH or let your hand come in contact with
a hot muffler, spark arrester, or a spark plug wire.
Don't ru n the saw without a muffler, exhaust stack,
or a spark arrester. Keep screens and baffles clean.@
KEEP THE CHAIN SHARP and SNUG on the GUIDE
bar. @
DON'T ALLOW DIRT, FUEL or SAWDUST to build up
on the engine or outside of the saw.
KEEP ALL SCREWS and FASTENERS TIGHT. Never
operate a chain saw that is damaged, improperly
adjusted, or is not completely and securely assem-
bled. Be sure that the saw chain stops moving when
the throttle control trigger is released. Keep the
handles dry, clean and free of oil or fuel mixture. @
DON'T OPERATE YOUR CHAIN SAW unless the
chain stops when the engine idles. (Have
corrected. )
5

DIRECTION OF FALL
-I>
52~~ ~",~"l 00
LfJ\¢> I -< 4Y
r\V- ~r- '.' ~CD
A
>i,I'I{t"
" . l
)...1' "
C
@
@
GENERAL CUTTING INSTRUCTIONS
i!I'i
II
II'
, I
II
This consumer chain saw is intended for general homeowner
use, and such general applications as clearing, pruning, and
cutting firewood.
Before using your saw, you should review the safety precau-
tions listed in your Owner's Manual, and all local regulations
for the operation of your saw. These precautions and regula-
tions are for your protection.
For all types of cutting, always hold saw firmly with both
hands, with thumbs and fingers encircling saw handles.
Cut at high engine speeds (full throttle) only. Don't run the
engine slowly at the start or during the cut.
Pre-plan a safe exit from a falling tree or limbs.
Cut wood only,
Test the operation of the CHAIN BRAKE before cutting,
FElLING
Direction of fall is controlled by the undercut. Type" A" is
easy to make and is commonly used for small trees. Type
"8" leaves butt end of log cut squarely across. Type "C"
is a variation of Type" A". The notch should be about 1/3
diameter of the tree. On felling cut, do not cut through to
notch. Uncut band of wood parallel to notch serves as a
hinge. Make cuts in order shown - 1, 2, 3 on "A".@
When diameter of wood being cut is greater than bar length,
make two cuts as shown.@
BUCKING
When bucking on a slope, always stand on the up hill side,
LOG SUPPORTED ALONG ENTIRE LENGTH: Cut from top
(overbuck), being careful to avoid cutting earth.@
LOG SUPPORTED ON ONE END: First cut from bottom (under-
buck) 1/3 diameter of log to avoid splintering. Second, over-
buck to meet first cut and avoid pinching. ®
LOG SUPPORTED ON BOTH ENDS: First overbuck 1/3 dia-
meter of log to avoid splintering. Second, underbuck to meet
first cut and avoid pinching, ®
LIM BING
Keep the log off the ground. Do not remove supporting limbs
until after the log is bucked into lengths, ®
6

FUEL AND LUBRICATION
FUEL
Use only regular grade leaded gasoline. Do not use highly
leaded. unleaded or low lead gasolines Chain saw fuel is a
mixture of gasoline and lUbricating oil. The correct ratio of
gasoline to oil is very important. Follow the ratios in the Fuel
Mixture Table. McCulloch 40: 1 Two-Cycle Custom Lubricant
is recommended. If not available. use a good grade SAE 40
two-cycle oil at a ratio of 20 to 1.
MIXING FUEL
Mix fuel in a container equipped with a flexible spout and
strainer. Pour half of the gasoline and all of the oil into the
container. Shake the container vigorouslyl Add the rest of the
gasoline and shake container vigorously again. Thoroughly
mixed fuel makes your saw run better.
CAUTION: Fuel additives or special starting fluids should not
be used because seals and other rubber composition parts
may be damaged.
CHAIN LUBRICATION
Always refill the chain oil tank each time the fuel tank is re-
filled. We recommend using McCulloch Chain. Bar and
Sprocket Oil, which contains additives to reduce friction and
wear and to assist in the prevention of pitch formation on the
bar and chain. If McCulloch Chain, Bar and Sprocket Oil is not
available, use SAE 30 non-additive motor oil at temperatures
above 40° F(5° C) and SAE 10 non-additive motor oil at
lower temperatures ..
FUEL MIXTURE TABLE
Gasoline
McCulloch 40:1 Ratio SAE 40 Two-Cycle Oil
Custom Lubricant 20: 1 Ratio
l, U. S. Gal. 1. 6 oz. 48 ml
(ee)
3.2 oz.
95 ml (ee)
1U.S. Gal. 3.2 oz.
95 ml
(ee)
6.4 oz.
190 ml (ee)
5 U. S. Gal. 16.0 oz.
475 ml (ee)
32.0 oz.
950 ml (ee)
1 Liter 0.9 oz. 25 ml
.(ee) 1. 7
oz.
50 ml (ee)
5 Liter 4.3 oz.
125 ml
(eel
8.5 oz. 250 ml (ee)
20 Li ter 17.0 oz. 500 ml (ee 34.0 oz. 1000 ml (ee)
1Imp. Gal.
4.3 oz.
125 ml
(ee)
8.6 oz. 250 ml (ee)
2Imp. Gal. 8.6 oz.
250 ml
~~~l
17.1 oz. 500 ml ~eel
5Imp. Gal. 21.4 oz.
625 ml
42.8 oz. 1250 ml ce
Mixing
40 parts gasoline to
20 parts gasoline to
Procedure
1 part lubricant
1 part lubricant
1 ml =lcc
7

INSTALLATION INSTRUCTIONS
GUIDE BAR, SAW CHAIN AND CHAIN BRAKE INSTALLATION
CAUTION: Do not attempt to start or run the engine until the
BAR, SAW CHAIN and CHAIN BRAKE have been installed.
WARNING: Handle the CHAIN BRAKE carefully when it is
removed from the saw because it is under tension.
1. Remove the upper retaining nut and bolt, and the lower
retaining nut. Remove the CHAIN BRAKE. This is only
necessary when the CHAI N BRAKE is assembled on the
unit. @
2. Slide the slotted end of the bar over the bar mounting
bolt and push it back toward the sprocket as far as it
will go.@
3. Spread the chain out in a loop with the cutting edges of
the chain pointing clockwise around the loop.
4. Tilt the top of the chain away from you so that you can
slide it edgewise over the top of the drum (under the
saw housing and sawdust deflector).@
5. Guide the chain around and behind the drum (between
the drum and the muffler) and onto the sprocket.@
6. Move the chain back and forth to make sure it is in
proper mesh with the sprocket and lined up with the
bar groove.@
7. Guide the chain center links into the bar groove all the
way around the bar. Pull the nose of the bar out to take
up all the slack in the chain. @
8. Make certain the CHAIN BRAKE lever is pulled back to
the disengaged position (chain can move).@
9. Install the CHAIN BRAKE, being certain the brake band
is fitted carefully around the outside of the clutch drum,
and the CHAI N BRAKE lever is set properly onto the
CHAI N BRAKE. @
CAUTION: THE CHAIN BRAKE CAN BE CRACKED OR
BROKEN if carelessly installed. The chain tension adjust-
ment nut (tang) must be properly positioned in the
adjustment hole in the bar before tightening the lower
retaining nut. There should be no large gaps between
the CHAI N BRAKE and the saw housing, and the front
should fit snug against the bar. ®
10. Turn the chain tension adjustment screw in or out to
align the nut with the bar hole. ®
11. Install the lower retaining nut finger tight.
12. Hold the nose of the bar up and turn the adjustment
screw clockwise to tension the chain. It should be a
snug fit all around the bar. @
NOTE: The chain has the proper tension when, with the
bar locked in the uppermost position, it has a snug fit all
around and will pull around the bar easily by hand. No
droop or sag of the chain is permitted.
,
13. Holding the nose of the bar up tighten the lower retain-
ing nut securely.
14. Install the retaining bolt and nut to the brake lever and
tighten securely.
8
®

9

OPERATING INSTRUCTIONS
CHAIN BRAKE OPERATION
Your chain saw is equipped with a CHAIN BRAKE that
reduces the possibility of injury due to "kickback." The
brake is actuated if pressure is applied against the lever
when. as in the event of "kickback," the operator's hand
strikes the lever. When the brake is actuated, chain move-
ment stops abruptly.
CAUTION: Purpose of the CHAIN BRAKE is to reduce the
possibility of injury due to "kickback" but it can not provide
the measure of protection intended if the saw is operated
carelessly.
The CHAIN BRAKE is disengaged (the chain can move) when
the brake lever is pulled back and locked. ®
The CHAIN BRAKE is engaged (chain is stopped) when the
brake lever is in the forward position. @
When the brake has been tripped and engaged (chain stops)
immediately release the throttle trigger to prevent damage to
engine or clutch.
If the CHAI N BRAKE has been actuated and the engine is
idling, grasp the brake lever firmly and pull back to the locked
position while controlling the saw with a hand grasping the
rear handle. Be careful not to squeeze the throttle trigger.
NOTE: Do not attempt to start or operate the engine with the
brake engaged (chain is stopped). Do not allow the engine to
idle for long periods of time when the brake is engaged as
this tends to build up heat in the sprocket bearing.
Before cutting with your saw, test the CHAIN BRAKE as
follows:
1. Place the saw on a firm flat surface.
2. Follow the correct procedures to start the engine.
3. Grasp the rear handle firmly with the right hand. @
4. With the left hand, hold the front handle (not the CHAIN
BRAKE lever) firmly.@
5. Squeeze the throttle trigger so that the chain begins to
move, then activate (push forward) the CHAIN BRAKE
lever. @
CAUTION: Activate the CHAIN BRAKE SLOWLY and ®
DELIBERATELY. Be careful to keep chain from touching 34
surface: don't let saw tip forward.
10