Redgum GX390, Owner'S Manual

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20
Troubleshooting
NOTE:
Some procedures listed here may need to be performed by a service centre or qualified
technician. Do not attempt any chipper maintenance or servicing if you are not competent to do
so, or if you do not have the correct tools available.
Difficulty starting the engine
Engine starts but does not idle
Possible Fault Action
Lack of Fuel Check that there is fuel in the tank and the fuel system is
primed. To further check if fuel is reaching the carburettor,
remove the carburettor drain plug, and check if fuel drains.
Engine “OFF” Ensure engine ON/OFF switch is in the ON position. Ensure that the
emergency engine stop button is not engaged.
Not enough or too Check oil level, to ensure that the level is at or just below the
much engine oil recommend maximum level.
Blades jammed Remove jammed material from the machine
Carbon build up on Remove the spark plug and clean any carbon from the electrodes
spark plug before re-installing it.
Faulty spark plug Remove the spark plug, then reconnect the plug lead to it. Place the
engine ON/OFF switch in “ON” position. Touch the spark plug electrode
to a part of the engine crankcase, away from the spark plug hole, and
attempt to start the engine – a spark should be visible across the
electrodes as the engine is rotated. If no spark is visible, replace the
spark plug.
Engine flooded Place the choke in “HOT” or “RUN” position. Leave the ON/OFF switch
in the “OFF” position. Pull the starter cord several times to assist
clearing excess fuel from engine before attempting to start engine.
Possible Fault Action
Blocked air filter Check and clean the air filter
Idle speed requires Adjust the idle speed until the engine runs smoothly and at a
adjustment reasonable speed when idling
Excessive vibration
Possible Fault Action
Material too large or Remove overly large branches from chipper. Reduce size of material
incorrect type being chipped. Reduce feed rate of material. Ensure all chutes are
free of obstacles and non-chippable materials (stones/metal etc)
Blades dull or Sharpen or replace cutting blades
damaged
Blade clearance Check that cutting blade clearance is between 0.6-0.8mm
incorrect
Fasteners loose Check all accessible fasteners for tightness.