Stihl MS 500i

0458-809-8621-A
57
English 22 Troubleshooting Guide
22.1 Chain saw
22 Troubleshooting Guide
Many performance issues can be resolved with a few simple steps. When troubleshooting, STIHL recommends that you start
with the following measures:
► Clean the air filter, @ 20.3.
► Clean or replace the spark plug, @ 20.4.
► Re-calibrate the engine to ambient conditions by performing 5 uniform bucking cuts at full throttle.
► If these measures do not resolve the issue, continue to the steps described below.
Always shut off the engine before carrying out any inspection, cleaning or maintenance.
Condition Possible Cause Remedy
The engine does not start. There is insufficient fuel in the fuel tank. ► Refuel the chain saw, @ 13.2.
The engine is flooded. ► Clear the combustion chamber, @ 22.2.
Acceleration is poor. The chain is tensioned too tight. ► Properly tension the chain, @ 10.3.
Insufficient bar and chain oil. ► Increase oil feed rate, @ 11.3.
The chain does not rotate
when throttle is opened.
The chain brake is engaged. ► Disengage the chain brake, @ 12.2.
The chain is tensioned too tight. ► Properly tension the chain, @ 10.3.
The guide bar sprocket is blocked. ► Spray the guide bar sprocket with resin
remover.
During sawing, the wood
smokes or smells burnt.
The chain is dull or improperly sharpened. ► Properly sharpen the chain, @ 10.3.
Working technique is improper or the saw is
being mis-used.
► Obtain instruction on proper working
technique.
Insufficient bar and chain oil. ► Have the chain lubrication mechanism
checked by an authorized STIHL servicing
dealer.