Troubleshooting; Troubleshooting Chainsaw - Stihl MS 194 T Instruction Manual

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18 Troubleshooting

18.1 Troubleshooting Chainsaw

Most malfunctions have the same causes.
► Perform the following operations:
► Clean the air filter.
► Clean or replace the spark plug.
► Carry out the standard setting.
► Adjust idle speed.
► Adjust carburetor for operation at high altitude.
► Adjust carburetor for cutting at temperatures below –10°C.
► If the malfunction still exists: Take the action described in the following table.
Condition
Engine does not start.
Engine idles erratically.
Engine stops while idling
Poor acceleration
Saw chain does not rotate
when throttle is opened.
32
Cause
Insufficient fuel in the tank. ► Mix fuel and refuel the chainsaw.
Engine is flooded.
Carburetor is too hot.
Carburetor is iced up.
Carburetor is iced up.
Carburetor is iced up.
The chain is over-
tensioned.
Chain lubrication system
is supplying insufficient
chain oil.
The chain brake is
engaged.
The chain is over-
tensioned.
Bar nose sprocket is
blocked.
Remedy
► Clear the combustion chamber.
► Allow chainsaw to cool down.
► If manual fuel pump is fitted: Depress the manual fuel pump at
least 10 times before starting the engine.
► Allow saw to warm up to +10°C.
► Allow saw to warm up to +10°C.
► Allow saw to warm up to +10°C.
► Tension the chain properly.
► Do not use the chainsaw and contact your STIHL servicing dealer
for assistance.
► Disengage the chain brake.
► Tension the chain properly.
► Clean the bar nose sprocket with STIHL resin solvent.
18 Troubleshooting
0458-568-0121-A