10
Troubleshooting
In small engines generally, difficult starting and erratic running is most often caused by a
dirty spark plug. If a new spark plug of the correct type does not restore the engine to
proper operating condition, the problem may be solved by reference to the chart below.
Problem
Possible cause
Correction
Does not start
Out of fuel
Refill tank with correct fuel
Throttle lever in incorrect position
Refer to 'Starting Procedures'
Spark plug lead not connected
Press terminal cover fully onto
the spark plug
Engine
flooded
Turn fuel tap 'OFF'. Pull starter cord
until engine starts, then turn fuel
tap 'ON'
Dirty spark plug
Replace spark plug
Stale fuel in tank from last season
Empty and refill with clean fuel, if it does not
work contact Service Centre.
Water in fuel tank
Empty and refill with clean fuel, if it does not
work contact Service Centre.
Service required
Contact Service Centre
Engine worn
Contact Service Centre
Low or no oil (4 stroke)
Check
Loss of Power
Incorrect throttle setting
Set throttle lever in the 'RUN' position
Dirty air filter element
Clean or replace
Too low height adjustment
Raise cutting height
Low or no oil (4 stroke)
Check
Poor cutting
Blades worn or damaged
Replace
Blade disc loose
Contact Service Centre
Slow running
Refer to 'Loss of Power' above
Blades restricted by grass and dirt
Remove spark plug lead and clean
accumulated under the baseplate
under the baseplate
Excessive vibrations
Build up of grass and dirt on upper
Remove spark plug lead & clean blade disc
surface of blade disc
Blades out of balance
Replace both blades
Bent or damaged disc or blade
Replace disc or both blades
Looseness of assembly
Check all nuts for tightness
Low or no oil (4 stroke)
Check
Engine stops
Fuel supply blocked
Check fuel line
frequently
Engine worn or seized
Contact Service Centre
Fuel cap not venting
Check / Loosen cap slightly
Low or no oil (4 stroke)
Check
If running difficulties continue, contact your closest Bushranger Authorised Service Centre
as listed in the back of this manual.
