McCulloch Mini-Mac 6 User manual

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t' C CHAIN '
u~':~· 0 SAWS
O""NERS'MANUAI:
• NlCCULLOCH!ImIl CORPORATION
®
01910 U.S.A. - McCULLOC H CORPORATION
83924
. .

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Fuel & Engine Lubrication 5 Dirt & Sawdust
Chain Lubrication ....
Operating Instructions .
Starting & Stopping
If En gine Floods ..
Breaking-in A New Engine
Cutting With Your Saw
S::IW Maintenance
Air Filter .
Spark Plug.
Exhaust Stack
Carbur etor Adjustment
6
8
10
11
12
13
17
17
20
21
22
Sprocket ....
Chain Maintenance
Installin g The Chain
Chain
T ension
New Chain Break-in
Chain Lubrication
Chain Sharpening
Keep Chain Clean
If Chain Breaks
Bar Maintenance
Cleaning ..
24
24
27
27
28
29
29
30
35
35
36
36
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rUll a cham saw (and even if you have) reading this manual will make your new •
~Iini-Mac 6 a 101 easier to use.
The serial numb e r of Ihe saw is scamped on a metal tab, attached tOlhe rear handle
adjacent 10 the spark plug. Make a record of the serial number for identification
in case the s aw is lost or stolen; and keep {he record in a safe place.
2

A power chain saw is a most useful and efficient woodcutting tool. As in the
operation of other mechanical equipment, however, it requires common
sense handling to provide safety as well as labor saving performance. A few
simple Do's and Don'ts can make all the difference.
Be safe!
Start your saw without help.
Start the saw
on a firm surface.
Turn off your
saw when moving between cuts.
Be su re of your footing and pre·plan a safe exit
from a falling treo.
Watch
out for falling limbs.
Refuel
in a safe place. Guard against fire hazards.
Keep a firm grip on a running saw with both hands.
Beware of "kickback".
Wear close fitting and protective clothing including
safety hat
s, goggles, shoes and gloves.
Obey all laws, rul es and regulations of the cutting
area.
Keep the chain snug on the guide bar.
Keep
all screws and fasteners tight.
Be sorry!
Fail to follow the instructions for operat ion of the
saw in this owner's manual.
Start a saw
on your leg or knee.
Let a moving cha in touch your clothing.
Touch
or try to stop a moving chain with your
hand.
Allow any other person or animal close to a running
saw
or where a tree is being cut down.
Cut with a dull or loose chain.
Smoke while operating the saw.
Spill fuel or sta rt a saw whero you fuel it.
Refuel a
hot saw., (Allow it to cool a few minutes.'
Use any other fuel than that recommended in your
owner's manual.
Run the saw without an exhaust stack, muffler or
spark arrester.
Allow dirt, fuel or sawdust to build up on the engine
or outside
of the saw.
Forget the rules for fire prevention and forest
protection.
3

FIGURE 1
OILER BUTTOt-l
4
.1... .. ________ ""

1etdad&~L~
Two-cycle engines are lubricated by oil mixed into the gasoline. The correct
ratio of oil to gasoline is very important. Follow the ratio specified in the
FUel Mixture Table. Use only regular grade gaSOline. McCulloch 40:1 Oil is
the best two-cycle motor oil to use. If it isn't available, use any well -known
brand of SAE 40 two-cycle, non-additive, motor oil. Never use dirty or re-
claimed motor oils.
Thoroughly mix the gaSOline and oil in a container equipped with a flexible spout
before filling the fuel tank of your saw. Wipe the fuel cap and the area around
it clean before filling the fuel tame. Do not let dirt get into the fuel tank. Dirt
can seriously damage the engine.
FUEL MIXTURE TABLE GASOLINE
TO OIL RATIO
WITH McCULLOCH 4Ch! OIL
WITH SAE ~o TWO-CYCLE MOTOR OIL
(40 TO 1 RAT 10)
( J6 TO 1 RAT 10)
Gasoline
Oil Gasoline
Oil
,
U.S. GALLONS
1(60Z.)CAN 1 U.S. GALLON
1/2U.S.P I NT
1.1/2 IMPERIAL
GALLONS 1(60Z.)CAN llMPERIAL GALLON
1/21MPERIAL PIN T
1
LITERS
1{60Z.)CAN 4LITERS
1/4 LITER
5 U.S. GALLONS 1 (16 02.) CAN
2 U.S. GALLONS 1 U.S. PINT
~ IMPERIAL
GALLOHS 1 (16 OZ.) CAH
2 IMP ERIAL GALLOHS
llMPERIAL P 11'1 T
19 LITERS
1 (16 OZ.) CAN
8 LITERS 1/2 LITER
5

Your chain is lubri cate d with oil from the chain oil tanle Fill the oil tank each
time you fill the fuel tan1e
We r ecommend using McCulloch Chain , Bar and Sprocket Oil which co ntains
additives to reduce friction and wear and to assist in the prevention of pitch
for mation 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 and
SAE 10 non-additive motor oil at lower temperatures.
Keep the oil supply container clean. Wipe the oil tank cap and the o il tank
surrounding the fill area clean before filling the oil tank. Do not use dirty or
reclaimed motor oils under any circumstances. Dirt can plug the chain oiling
system. Never operate your saw if the oiler system does not work.
AUTOMATIC OILER ADJUSTMENT
Some Mini Mac 6 saws are equipped with an automatic cha in oiler. adjusted
at the factory for average cutting conditions. Oil now may be adjusted however,
6

to suit individual desires by an adjustment screw at the front of the saw. Turn
the screw clockwise to decrease oil fl ow and counterclockwise to in c reas e it.
The automatic oiler adjust m ent
screw should never be t urn ed more
than a qu arter turn at a ti me without
checking the oil flow after the ad-
justment. Maximum o il flow can
em pty the ch ain o il tan k in ap proxi-
mately ten minutes of cutti ng. Where
increased oil flow is desired for
short periods, it is better to sup-
pl ement the o il flow by mor e frequent
use of the manual oiler button. The
automatic oiler supplies o il when-
ever the engine is running. Long
periods at idle speed can result in
oil puddl es beneath the saw and
wasted oil. It is advisable to turn
the saw off between cu ts unless it is
in almost contin uous us e.
7

tJlt~1~~
CHAIN TENSION IS IMPORTANT:
A too loos e ch ain can be danger ous - a too tight chain can be expe nsive because
it will wear rut fast.
Even th ough your ch ain is installed , check chain te nsion before you start your
saw. Chain te nsion is correct wh en the chain has a snug fit on the bar rut ca n
sti ll be pu ll ed easily aroun d the bar
by hand. Ch ain is sharp - protec t
your hand when touc h ing it.
MOUNTING NUT
",~~,~
8

Follow these steps to adjust chain
tension:
1. Loosen the bar mounting nut.
See Figure 3.
2. With the bar nose or rounded end
of
the bar held up! turn the ten-
sion adjusting screw clockwise to
tighten the chain. Turn the screw
counterclockwise to loosen the
chain. See Figure 4.
3. When tension is correct! tighten the bar mounting nut while still holding
the nose of the bar up and then recheck chain tension by pulling it around
the bar. Protect your hand from the sharp cutting teeth of the chain.
See Figure 5.
A
chain will lengthen during the first few hours of use. If the chain is hot to
the touch, allow it to cool before checking tension. Keep chain and bar groove
oiled. For more information on chain maintenance, tUrn to page 27.
9

STARTING & STOPPING
1. Fill the fuel tank with the correct
fuel mixture . Fill the chain oil tank
with McCulloch Chain, Bar and
Sprocket Oil. Pump the manual
oiler lxItton until oil shows between
the chain and the bar at the top of
the bar where the chai n comes Qut
from b ehi nd the clu teh guard.
Figure 6.
2. Make sure the chain has the cor-
rect tension and that the bar is
tight on the saw.
3. Slide the ignition switch to th e ON position.
4. Turn the choke l ever to the fully closed pOSition. A warm engine usually
does not r e quir e the us e of the choke. However, when restarting an ex-
10

tremely hot engine or one whi ch has just been r e fueled, it may be nec ess ary
to use the choke to clean out the vapors in the carburetor.
5. Hold the throttl e trigger back and pull the starter handle with a smooth, rapid
stroke. Guide the rope back into th e s tart e r. The eng in e shou ld start with
two or three pulls. Additional pull s may be r e quired if the engine h as n't
b
ee n started r ecen tly or if the fu el tank was empty prior to bein g filled .
6. As
soon as the eng ine starts, turn the choke l ever to the open positi on. U se
choke and thr ott le as n ecessary to k ee p the engine running until warmed up.
Nev er run the engine at full s peed unl ess cuttin g wood.
7.
Pu mp the chain o il button eve ry ten to fifteen seconds or as need ed to keep
the chain and bar g roo ve lubricat ed.
8.
To sto p the engine, release the throttl e trig ge r and slide the ig nition switch
to th e OFF position.
IF ENGINE FLOODS
1. Turn choke l ever to op en position. Move igniti on switch to ON.
11

2. Hold saw with muffler side down.
3. Hold
throttle trigger full back and pull starter handle until eng ine starts.
BREAKING IN A NEW ENGINE
Run your saw engine at one-third throttle for three minutes and then at one-
half thr ottle for three minutes prior to making your first cut. By operating the
engine at part throttl e for the first few minutes with the correct fuel mixture,
all bearin g surfaces will be properly lubricated for lon ger life and better
performance.
The saw shruld always be operated at full throttl e when it is under load and in
the cut, but only when cutting under load conditions.
Make
several preliminary cuLs to get the feel of your saw. Stop the eng ine
after each preliminary cut and check the cha in to make SUre it is lubricated
prop er ly and to adjust chain tension.
12

CUTTING WITH YOUR SAW
The most common types of cutting are felling , limbin g, pruning and bucking.
Advice on how to make these cuts is given in the paragraphs which follow, It
is helpful to use a spike which is an accessory available from your McCulloch
dealer .
FELLING
Felling is the t erm for cutting down a tr ee. Small trees of up to six and a half
or seven inches in diameter are usually cut through in one cut. Larger trees
require undercuts. Undercuts determine the direction the tree will fa ll . The
tree, unless it is l eaning too far in the wrong direction, will usually fall toward
the side of the undercut. Types of undercuts are shown in the illustration . Type
A is easy to make and commonly used for small trees. Type B leaves the butt
end of the log cut square . Type C is a variation of Type A. The unde rcut shou ld
be about one-third of the diameter of the tree. Do not cut comp l ete ly through
to the undercut on the felling cut. Th e uncut band of wood between the undercut
and the felling cut acts as a hinge. Figures 7 and 8.
13

Felling Cut
FIGURE 7 A
If th(;:re is bru sh around the tree you
are felling, clear a working space so
that yoo do not trip or stumble when
working , Have a clear path of retreat
before making the felling cut. Watch
out
for dead limbs and bark which
might fall while you are cutting.
Be sure to clean the cut wood out of
the undercut so the tree will fall true.
Make the felling cut horizontal, moving
the bar in an arc. If you are using a
14
D;,ect;on~ I . ' ' ['
ofFoll<:> " '1
I .
1 '1 ,
.j;
' "J ,', ,_
B (
FIGURE 8 ~

spike, let the moving saw chain draw the spike tight against the tree. The
spike will act as a fulcrum. On a small tree, the felling cut can be made
from one side. On a larger tree, make the felling cut from both sides. You
cha then see what you are doing and will be able to leave an equal amount of
wood
as a hinge.
LIMBING
Limbing is the process of removing limbs from either standing or fallen trees.
Make sure you are out of the way of any falling limbs. If the tree lies on
sloping ground, cut off the limbs which are off the ground first. Be sure to
stand on the uphill side of the tree when cutting on sloping ground.
PRUNING
Pruning is removing unwanted limbs
from a standing tree to improve the
tree 's appearance . It is advisab le to
attach the saw to a rope so you can
pull it up into the tree after you. Keep
the rope tied to the saw while cu tt ing
and tie the other end to the tree so the
""-----,
15

saw can fall only a short distance if
you drop it. Make sure yoo are secured
to the tree. A safety rcpe or belt aroond
the tree trunk will allow yru to us e both
ha
nd s On the saw.
When pruning make an undercut a f ew
inch es from the trunk first. This w ill
prevent the falling limb fr om tearing
away bark from the trunk. Then mak e
a
do wnward cut to meet the upward cut.
Finally, after th e limb has fallen, make
a
second downward cut next to the trunk
to remove the st ub. Figure 9.
BUCKING
Bucking is cutting a fallen lo g into
len gt h s. Make su r e you have good
footing am stand uphill of the log wh en
cutting on sl op ing grrund. If poss ibl e,
16
FIGURE 10

the log should be supported so that the end to be cut off is off the ground in the
air. Ii the log is supported at both ends and you must cut in the middle, make
an undercut halfway through the log and then make your down ward cut. This
will prevent the log from pinching your bar and chain. Be careful that the
chain does not cut into the ground when bucking as this causes rapid dulling of
the chain. Figure 10.
While most of the maintenance of the Mini Mac 6 can be done by anyone handy
with tools, specialized adjustments and repair work should be done by a
McCulloch chain saw serviceman.
AIR FILTER
The air filter acts like the air filter on a car. It keeps di rt out of the eng ine.
The air filter must be kept clean . If the filter gets dirty, the engine won't
run properly because the dirt will block the flow of air .
17

To clean the air filt er -
1. Lift the spring latch of the a ir
cleaner cover and remove the cover.
Figure 11.
2. Lilt off the air Hlter screen, Fig-
u res 12 and 13. Bl ow the filter
clean with light a ir p ressure or
wash it in fuel mix. Dry in open
air and keep away from openflame.
3. Retnstall the screen in it s or igin al
position - centered within the ring
of sma ll l ocating stu ds on the fan
hous
in g.
4. R
einsta ll cover . Slide the lips on forward end of cover under mating flanges
on ian housing, then press rear end of the cover down until it snaps into
position, smooth and even all around at the edges. Push the spring la tch
down until it engages the r e tainin g notch at the back of the fan h ous ing.
18

FIGURE 12
FIGURE 13
19 j
,

SPARK PLUG
A clean, properly gapped spark plug" is a major factor in easy starting and best
performance. When starting or performance is not satisfactory, the plug
should be cleaned and gapped.
To clean and gap the sparl{ plug --
1. Remove the rubber connector from
the spark plug. Figure 14.
2. Remove the spark plug with a spark
plug wrench.
3.
Clean the electrodes with emery clQth or very fine sandpaper. not use
a spark plug cleaning machine. It is almost impossible to clean the grit
from the spark plug.) Blow all dust away.
4. Adjust the side electrode to a gap of 0.025 inch (0.635 mm).
5. Wipe all dirt off the white porcelain insulator and reinstall the spark plug and
connector. .
20