Mac allister MLMP450HP40, Manual

Page: 21 / 22

40 41
MLMP450HP40 By MacAllister MLMP450HP40 By MacAllister
In
more
detail
. . .
In
more
detail
. . .
40
Trouble shooting
Therefore check the product using this section. In most cases the problem can be
solved quickly.
WARNING! Only perform the steps described within these instructions! All
further inspection, maintenance and repair work must be performed by an
the problem yourself!
Problem Possible cause Solution
1. Engine
does not
start 1.1 Not enough fuel in fuel tank 1.1 Add fuel
1.2 Spark plug is wet 1.2 Dry spark plug
1.3 Spark plug is damaged 1.3 Replace spark plug
1.4 Spark plug connector lose 1.4 Attach properly
1.5 Throttle lever not in the
correct position for the
prevailing conditions 1.5 Move throttle lever to correct
position
1.6 1.6
1.7 Spark plug loose 1.7 Tighten spark plug 20 N m
1.8 Spark plug gap is incorrect 1.8 Set gap between electrodes
at 0.51 mm
1.9
fuel
1.9
pull recoil starter handle
continuously until carburettor
clears itself and install air
1.10 Faulty ignition module 1.10 Contact the service agent
2. Engine
stops 2.1 Not enough fuel in fuel tank 2.1 Add fuel
2.2 Cutting device is blocked 2.2 Remove blockage
3. Engine
to start
or loses
power
3.1 Dirt, water or stale fuel in the
tank 3.1 Drain fuel and clean tank. Fill
tank with clean, fresh fuel
3.2 Vent hole in fuel tank cap is
clogged 3.2 Clean or replace fuel tank
cap
3.3 3.3
Trouble shooting
Problem Possible cause Solution
4. Engine
operates
erratically 4.1 Spark plug is defective 4.1 Install new, correctly gapped
plug
4.2 Spark plug gap is incorrect 4.2 Set gap between electrodes
at 0.51 mm
4.3 4.3
5. Engine
idles
poorly 5.1 5.1
5.2 Air vents are clogged 5.2 Remove debris from vents
5.3 5.3 Remove debris from cylinder
6. Engine
skips
at high
speed 6.1 Gap between electrodes of
spark plug is too close 6.1 Set gap between electrodes
at 0.51 mm
7. Engine
overheats 7.1 Air vents are clogged 7.1 Remove debris from vents
7.2 Incorrect spark plug 7.2 Install correct spark plug and
8. Unsatis-
factory
result 8.1 Cutting device dull 8.1 Replace with a new one
8.2 Cutting material exceeds
capacity 8.2 Only cut materials acc. to the
capacity of the product.
8.3 Cutting height is incorrect 8.3 Adjust cutting height
9. Excessive
vibration/
noise or
exhaust 9.1 Cutting device is dull/
damaged 9.1 Replace with a new one
9.2 Bolts/nuts are loosen 9.2 Tighten bolts/nuts
9.3 Petrol/oil is incorrect 9.3 Empty out unused petrol/
petrol/oil
Trouble shooting