Troubleshooting - OREC AHRC 663 Operating Instructions Manual

Troubleshooting

If the engine malfunctions perform diagnosis by referring to the following table and then taking the appropriate
action.
Effect
Safety switch is not in the [start up] position.
Choke lever has not been pulled out.
Fuel is not flowing properly.
You have trouble
starting the
machine, or the
There is air or water mixed in the fuel
machine will not
delivery system.
start at all.
In cold weather, oil becomes thick, and so
the rotation of the engine heavy.
Ignition coil or unit is defective.
Defective spark plug.
Fuel shortage.
Clogged air filter.
Poor quality fuel.
Output shortage
Choke has not been fully opened.
Cooling system is clogged.
Fuel shortage.
The machine stops
suddenly.
Fuel valve is closed.
Poor quality fuel.
Exhaust gas is
abnormally black
Overfilled with engine oil.
Air filter element is clogged.
Muffler emits black
smoke and power
Choke has not been fully opened.
output falls.
Overfilled with engine oil.
Muffler emits gray
smoke.
Cylinder or piston ring is worn out
Engine power is
Choke has not been fully opened.
not stable (does
not increase).
Poor quality fuel.
Defective ignition coil.
Momentary stall.
Fuel filter is clogged.
Exhaust has an
Poor quality fuel.
abnormal odor.
If you do not understand any of these points, please consult with the retailer where you purchased this machine.
Possible cause
42
Treatment
Put the safety switch to the [start up] position.
When cooling the engine, put the choke bar in the
position.
Inspect fuel tank, remove impure deposits or water.
Remove the fuel valve strainer and clean out any
sediment deposited inside the cap along with any other
attached dirt.
Remove foreign object, inspect fastening bands, replace
damaged parts with new ones.
Use the correct oil depending on the outside temperature.
Replace the ignition coil or unit.
Inspect the gap between spark plug electrodes and
adjust.
Replace with new spark plug.
Refuel the machine.
Clean the element.
Replace with good quality fuel.
Return the choke bar completely.
Put it in the position.
Clean around the recoil starter.
Refuel the machine.
Open the fuel valve.
Replace with good quality fuel.
See that oil level is straight.
Clean the element.
Return the choke bar completely.
Put it in the position.
Check that oil level is straight.
Replace the ring.
Return the choke bar completely.
Put it in the position
Replace with good quality fuel.
Replace the ignition coil.
Clean the fuel filter.
Replace with good quality fuel.