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114 TROUBLESHOOTING / TECHNICAL SPECIFICATIONS
EN
9.  TROUBLESHOOTING
1) The engine will 
not start or will not 
keep running
2) The engine starts 
but is lacking in 
power
3) The engine runs 
irregularly and lacks 
in power when 
revved
4) The engine gives 
o an excessive 
amount of smoke
–  Incorrect starting procedure
–  Dirty spark plug or incorrect
distance between the electrodes
–  Air lter clogged
–  Carburetion problems
–  Air lter clogged
–  Carburetion problems
–  Dirty spark plug or incorrect
distance between the electrodes
–  Carburetion problems
–  Incorrect composition
of the fuel mixture
–  Carburetion problems
–  Follow the instructions
(see chapter 6)
–  Check the spark plug
(see chapter 8)
–  Clean and/or replace the lter
(see chapter 8)
–  Contact your dealer
–  Clean and/or replace the lter
(see chapter 8)
–  Contact your dealer
–  Check the spark plug
(see chapter 8)
–  Contact your dealer
–  Prepare the fuel mixture according 
to the instructions (see chap. 5)
–  Contact your dealer
PROBLEM  LIKELY CAUSE  SOLUTION
Engine  ................................. 2-stroke air-cooled
Capacity / Power 
28/326  mod.  ...................... 25.4 cm
3
 / 0.7 kW
33/336  mod.  ...................... 32.6 cm
3
 / 0.9 kW
44/346  mod.  ...................... 42.7 cm
3
 / 1.1 kW
Engine rotation speed at tick-over 
28/326  mod.  .......................... 2520-3080 rpm
33/336  mod.  .......................... 2520-3080 rpm
44/346  mod.  .......................... 2520-3080 rpm
Maximum engine rotation speed 
28/326  mod.  ................................. 10000 rpm
33/336  mod.  ................................. 10000 rpm
44/346  mod.  ................................... 9500 rpm
Maximum tool rotation speed 
28/326  mod.  ................................... 7800 rpm
33/336  mod.  ................................... 7800 rpm
44/346  mod.  ................................... 7400 rpm
Spark plug  ............................... Torch L8RTC or
NGK-R BPMR7A or equivalent
Mixture  ........... Petrol : 2-stroke oil  = 50:1 = 2%
Tank capacity 
28/326  mod.  ..................................... 650 cm
3
33/336  mod.  ..................................... 850 cm
3
44/346  mod.  ..................................... 950 cm
3
Maximum permitted blade diameter
3 or 4 point blade  ........................... Ø 255 mm
Weight 
1)
28/326 ................................................... 6.8 kg
28 J ....................................................... 7.3 kg
28 D ...................................................... 6.9 kg
28 JD ..................................................... 7.7 kg
33/336 ................................................... 7.8 kg
33 D ...................................................... 8.6 kg
44/346 ................................................... 8.6 kg
44 D ...................................................... 9.5 kg
1)
Weight as per standard ISO 11806-1
(without fuel, cutting devices and harness)
10.  TECHNICAL SPECIFICATIONS
116


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