McCulloch MB2500BP, User Manual

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4-3. ATTACH INTERMEDIATE TUBE AND
CONCENTRATOR NOZZLE
Connect the intermediate tube (H) and concentrator noz-
zle (I) or 56mm nozzle (J) (you can only use I nozzle at
time). Push the tubes together and turn them clockwise
so that they lock together (Fig. 4-3A). Use concentrator
nozzle when you need more airflow in tight places: flower
beds, under decks, etc.
4-4. ADJUST BACK PACK HARNESS AND
CONTROL HANDLE
1. Place blower on your back by slipping arms through
the shoulder straps as if you were putting on a jacket
(Figure 4-4A).
2. Adjust backpack harness and control handle.
3. Once adjustments have been made, to the straps for
user comfort, remove the blower from your back and
place on level ground in an upright position.
8 7
4 - ASSEMBLY INSTRUCTIONS
5 - FUEL AND LUBRICATION
5-1. FUEL
Use regular grade unleaded gasoline mixed with Genuine
Factory Parts 40:1 custom 2-cycle engine oil for best
results. Use mixing ratios 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 Factory Parts
Custom 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 recom-
mended mixing ratio of 100:1. If insufficient lubrication is
the cause of engine damage, it voids the manufacturer’s
engine warranty.
5-2. 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.
5-3. FUEL MIXING TABLE
5-4. RECOMMENDED FUELS
Some conventional 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.
5-5. FUEL AND LUBRICATION SYMBOLS
Gasoline and Oil
Mix 40:1
4-3A
B
D
H
I
40mm
56mm
J
4-4A
6 - STARTING/STOPPING INSTRUCTIONS
6-1.STARTING A COLD ENGINE (Above 55˚F)
Mix the bottle of 2-cycle oil (included) with 1 gallon of unlead-
ed gasoline (less than 30 days old). Combine them in a sepa-
rate container using a 40:1 ratio. Pour into fuel tank.
1. Squeeze throttle (A) and push throttle lock (B) to
advance throttle for starting. (Figure 6-1A)
2. Pump “primer bulb” (C) 10 times. (Figure 6-1B)
3. Move choke lever to Choke “1”.(Figure 6-1C)
4. With the unit on the ground, hold the top assist handle
and step on the bottom of the frame with foot. Pull
starter rope 6 times. (Figure 6-1D)
NOTE: The unit uses the Smooth Pull
TM
starting system,
which significantly reduces the effort required to start the
engine. You must pull the starter rope out far enough to
hear the engine attempt to start. There is no need to pull
the rope briskly--there is no harsh resistance when pulling.
Be aware that this starting method is vastly different from
(and much easier than) what you may be used to.
5. Move choke lever to “2” (Fig. 6-1E)
6. Pull starter rope again 1~6 times (Fig. 6-1F)
7. The engine should start. After 30 sec. Move choke to
“3”.(Fig. 6-1G)
8. Squeeze throttle and release to disengage lock ; Unit
is now at idle. (Fig. 6-1A)
NOTE: If engine fails to start after repeated attempts,
refer to Troubleshooting 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.
6-1A
B
A
6-1C
D
6-1B
C
6-1D
6-1E
6-1F
6-1G
D