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4-1. FUEL
Use regular grade unleaded gasoline mixed with Genuine
McCulloch 40:1 2-cycle engine oil for best results. Use mix-
ing r
atios in Section 5-3.
Never use straight gasoline in your unit. This will
cause permanent engine damage and void the man-
ufacturer’s warranty for that product. Never use a fuel mix-
ture that has been stored for over 90 days.
If 2-cycle lubricant other than Genuine McCulloch
Lubricant is to be used, it must be a premium grade
oil for 2-cycle air cooled engines mixed at a 40:1 ratio. Do
not use any 2-cycle oil product with a recommended mix-
ing ratio of 100:1. If insufficient lubrication is the cause of
engine damage, it voids the manufacturer’s engine warran-
ty.
4-2. MIXING FUEL
Add oil to an approved fuel container followed by the gaso-
line to allow incoming gasoline to mix with oil. Shake con-
tainer to ensure thorough mix.
Lack of lubrication voids engine warranty. Gasoline
and oil must be mixed at 40:1.
4-3. FUEL MIXING TABLE
4-4. RECOMMENDED FUELS
Some con
ventional gasolines are being blended with oxy-
genates such as alcohol or an ether compound to meet
clean air standards
. Your McCulloch engine is designed to
operate satisfactorily on any gasoline intended for automo-
tive use including oxygenated gasolines.
4-5. FUEL AND LUBRICATION SYMBOLS
4 - FUEL AND LUBRICATION
5-1. STARTING A COLD ENGINE
NOTE: To minimize load on engine during starting and
w
arm-up, trim excess cutting line to 5” (13cm) (Fig. 5-1A).
1. Move ignition switch to the “RUN (I)” position (Fig. 5-
1B).
2. Your unit is designed with a 3 position choke: CHOKE
“ ”, START “ ”, and RUN “ ”. Move choke lever to
CHOKE “ ” position (Fig. 5-1C).
3. Prime the carburetor. Pump the primer bulb (A) 10
times (Fig. 5-1D).
4. Grip handle firmly – depress safety trigger (B) & throt-
tle trigger (C) to the FULL THROTTLE position (Fig. 5-
1E).
5. Pull starter rope until resistance is felt (about 4”) (Fig.
5-1F). A smooth rapid pull is required for a strong
spark. Pull starter rope briskly 4 times.
6. Move choke lever to START “ ” position (Fig. 5-1G).
7. Pull starter rope again 4 times while trigger is in the
full throttle position.
8. Once engine starts, leave in the START “ ” position
for 10 seconds.
9. Move the choke to RUN “ ” position (Fig. 5-1H).
10. If engine fails to start, repeat steps 1 through 9.
NOTE: If engine fails to start after repeated attempts, refer
to trouble shooting section.
NOTE: Always pull starter rope straight out. Pulling starter
at an angle will cause rope to rub against the eyelet. This
friction will cause the rope to fray and wear more quickly.
Always hold starter handle when rope retracts. Never allow
rope to snap back from extended position.This could cause
rope to snag or fray and also damage the starter assembly.
5 - OPERATING INSTRUCTIONS
Gasoline and Oil
Mix 40:1
5-1C
5-1D
A
5-1E
C
B
5-1F
5-1G
5-1H
5-1A
5" (13cm)
5-1B
GASOLINE
McCulloch 40:1 Ratio
Lubricant
1 U.S. Gal. 3.2 oz. 95ml (cc)
5 Liters 4.3 oz. 125ml (cc)
1 lmp. Gal. 4.3 oz. 125ml (cc)
Mixing
Procedure
40 Parts Gasoline to
1 Part Lubricant
1ml=1cc