Stihl BR 800 [25/80] Engine management adjusting the carburetor

BR 800, BR 800 X

English

Exhaust emissions are controlled by the

design of the engine and components

(e.g. carburation, ignition, timing and

valve or port timing).

Adjusting Idle Speed

Engine stops while idling:

N Turn the idle speed screw(LA)

slowly clockwise until the engine

runs smoothly.

If there is a loss of engine power, the

machine is difficult to start or runs poorly

at idle, first check the spark plug.

Install a new spark plug after approx.

100 operating hours or earlier if the

electrodes are eroded/corroded.

The 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 degrade performance.

Removing the Spark Plug

N Loosen the screw(1).

N Remove the cover (2).

N Pull off the spark plug boot (3).

N Unscrew the spark plug(4).

Engine Management Adjusting the Carburetor

0000-GXX-6224-A0

Spark Plug

0000-GXX-5396-A0