Operation Manual
48
English / USA
MS 361 C
: If the engine is down on power, 
check the spark arresting screen in 
the muffler.
: Wait for the muffler to cool down. 
: Take out the screw (1).
: Remove the spark arresting
screen (2).
: Clean the spark arresting screen.
If the screen is damaged or heavily
carbonized, fit a new one.
: Refit the spark arresting screen.
: Fit the screw and tighten it down 
firmly.
* see "Guide to Using this Manual"
Wrong fuel mix (too much engine oil in 
the gasoline), a dirty air filter and 
unfavorable running conditions (mostly 
at part throttle etc.) affect the condition of 
the spark plug. These factors cause 
deposits to form on the insulator nose 
which may result in trouble in operation.
If engine is down on power, difficult to 
start or runs poorly at idling speed, first 
check the spark plug.
: Remove spark plug – see "Starting / 
Stopping the Engine".
: Clean dirty spark plug.
: Check electrode gap (A) and 
readjust if necessary – see 
"Specifications".
: Use only resistor type spark plugs 
of the approved range.
Rectify problems which have caused 
fouling of spark plug: 
: Too much oil in fuel mix.
: Dirty air filter.
: Unfavorable running conditions, 
e.g. operating at part load.
Fit a new spark plug after approx. 
100 operating hours 
or earlier if the electrodes are badly 
eroded.
Spark Arresting Screen
in Muffler*
213BA016 KN
1
2
Checking the Spark Plug
000BA002 KN










