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SERVICE MANUAL
McCULLOCH
McCULLOCH
Model
Eager Beaver 2010,
Mac 3210
Silver Eagle 2012
Eager Beaver 2014,
Mac 3214,
Silver Eagle 2014
Eager Beaver 2016,
Mac 3216,
Silver Eagle 2016
Bore
36 mm
(1.4 in.)
36 mm
(1.4 in.)
36 mm
(1.4 in.)
36 mm
(1.4 in.)
Stroke
30 mm
(1.2 in.)
30 mm
(1.2 in.)
30 mm
(1.2 in.)
30 mm
(1.2 in.)
DispL
32 cc
(2.1 cu. in.)
32 cc
(2.1CU. in.)
32 cc
(2.1 cu. in.)
32 cc
(2.1CU. in.)
Drive
Type
Direct
Direct
Direct
Direct
MAINTENANCE
SPARK PLUG.
Recommended
spark plug is Champion DJ7Y or equiv-
alent for all models. Spark plug elec-
trode gap is 0.025 in. ( 0.6 mm) for all
models. Note that spark plug has a ta-
pered seat and does not require a gas-
ket. Tighten spark plug to 150 in.-lbs.
(17 N.m).
CARBURETOR AZamaClQM27
diaphragm type carburetor is used on
all models. Refer to CARBURETOR
SERVICE section for overhaul proce-
dures and exploded views of Zama car-
buretors.
Initial a4justment for both the low-
speed and high-speed mixture screws is
one turn open from a lightly seated po-
sition. Make final adjustment with en-
gine warm and running. Make certain
that the air cleaner is clean.
Adjust idle speed screw so engine
idles just below clutch engagement
speed. Adjust low-speed mixture screw
to obtain highest possible engine speed,
then turn screw out (counterclockwise)
1/8 to 1/4 turn. Engine should acceler-
ate cleanly without hesitation. If en-
gine stumbles or seems sluggish when
accelerating, adjust low-speed mixture
screw until engine accelerates cleanly.
Readjust idle speed screw if necessary
to obtain recommended idle speed of
2800-3300 rpm. Chain must not move
when engine is idling.
High-speed mixture screw should be
adjusted to obtain optimum perform-
ance with saw under cutting load. Do
not adjust high-speed mixture screw
too lean (turned too far clockwise) as
maximum permissible engine speed
may be exceeded and engine may be
damaged from lack of lubrication and
overheating. Maximum no-load speed
(with bar and chain installed) must not
exceed 11,000 rpm.
To remove c a r b u r e t o r (4—Fig.
MC130), remove the air filter cover (1)
and filter element. Remove the two
screws securing the filter base (3) and
carburetor. Remove the filter base and
carburetor, and disconnect fuel line and
throttle link. Tighten carburetor
mounting screws to 30-40 in.-lbs.
(3.4-4.5 N-m).
IGNITION.
All engines are
equipped with an electronic ignition
system. The ignition coil and electronic
circuitry are contained in a one-piece
ignition
module (10—Fig. MC130),
which is serviced as a unit assembly.
Air gap between the fiywheel mag-
nets and the laminated legs of the mod-
ule should be 0.010-0.015 in. (0.25-0.38
mm). Loosen ignition module mounting
screws and move module to obtain de-
sired air gap. If air gap is excessive, en-
gine may bie hard to start or may not
start.
LUBRICATION. The engine is lu-
bricated by oil mixed with the gasoline
fuel. Recommended fiiehoil ratio is 40:1
when using McCulloch 2-cycle oil. If
McCulloch oil is not used, a good grade
oil designed for use in air-cooled,
two-stroke engines should be mixed at
a 20:1 ratio. Do not use oil designed for
automotive use. Use a separate con-
tainer to mix the fuel and oil.
All models are equipped with an
automatic chain oiling system. Recom-
mended oil is McCulloch Chain, Bar
and Sprocket oil. Oil designed for auto-
motive use may also be used. Select oil
viscosity according to ambient tem-
perature.
REPAIRS
CRANKCASE PRESSURE TEST.
An improperly sealed crankcase can
cause the engine to be hard to start, run
rough, have low power and overheat.
Refer to ENGINE SERVICE section of
this manual for crankcase pressure test
procedure. If crankcase leakage is indi-
cated, pressurize the crankcase and use
a solution of soap and water to check
gasket, seals, pulse line and castings
for leakage.
PISTON,
RINGS
AND
CYLINDER. To remove the piston, it
is necessary to remove the powerhead
(12—Fig. MC131) and separate the cyl-
inder from the crankcase as follows:
Unbolt and remove chain brake hous-
ing (13—Fig. MC131), bar and chain.
Remove the air filter cover (10), fan
housing (24), fiiel tank (7) and oil tank
(20). Remove the ignition module, air
filter assembly, carburetor and muffler.
Remove spark plug and install a suit-
able piston stop tool or insert the end of
a rope in spark plug hole to prevent the
crankshaft from rotating. Note that fly-
Illustntions couit^y McCuUoch Corp.
391
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