► If the malfunction still exists: Take the action described in the following table.
Condition
Cause
Remedy
Engine does not
start.
Insufficient fuel in the
tank.
► Mix fuel and refuel the chainsaw.
Engine is flooded.
► Clear the combustion chamber.
Poor acceleration
The chain is over-ten‐
sioned.
► Tension chain properly.
Chain lubrication sys‐
tem is supplying
insufficient chain oil.
► Increase oil feed rate.
Saw chain does not
rotate when throttle is
opened.
The chain brake is
engaged.
► Disengage the chain brake.
The chain is over-ten‐
sioned.
► Tension chain properly.
Bar nose sprocket is
blocked.
► Clean the bar nose sprocket with STIHL resin solvent.
Smoke or burning
smell while cutting.
Chain is not properly
sharpened.
► Sharpen the chain properly.
Insufficient chain oil
in the tank.
► Fill up with chain oil.
Chain lubrication sys‐
tem is supplying
insufficient chain oil.
► Increase oil feed rate.
The chain is over-ten‐
sioned.
► Tension chain properly.
Chainsaw is not
being used properly.
► Have correct use explained, then practice.
18.2
Clearing the Combustion
Chamber
► Engage the chain brake.
3
0000-GXX-5821-A0
2
5
1
4
► Rotate the filter cover lock (1) a quarter turn
counterclockwise.
► Remove the filter cover (2).
► Rotate the shroud lock (1) a quarter turn coun‐
terclockwise.
► Remove the shroud (4).
► Pull off the spark plug boot (5).
► Unscrew the spark plug.
► Dry the spark plug.
WARNING
■ Unconfined sparks may occur if the starter grip
is pulled after the spark plug boot has been
removed. Sparks may cause a fire or an
explosion in an easily combustible or explo‐
sive environment. This can result in serious or
fatal injuries and damage to property.
► Depress the stop switch and keep it
depressed before pulling the starter grip.
► Depress the stop switch and hold it in that
position.
► Pull the starter grip and guide it back several
times.
The combustion chamber is cleared.
► Insert and tighten down the spark plug.
0000-GXX-5822-A0
5
6
18 Troubleshooting
English
0458-809-0121-B. VA0.A21.
25
Summary of Contents for MS 500i
Page 1: ...STIHL MS 500i Instruction Manual 2 28...
Page 29: ...23 EC Declaration of Conformity English 0458 809 0121 B VA0 A21 29...
Page 30: ...English 23 EC Declaration of Conformity 30 0458 809 0121 B VA0 A21...
Page 31: ...23 EC Declaration of Conformity English 0458 809 0121 B VA0 A21 31...
Page 32: ...www stihl com 04588090121B 04588090121B 0458 809 0121 B 0458 809 0121 B...