Stihl FS 88 Instruction Manual - Page 39

FS

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FS

108

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FS 108

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Fine tuning

•

Mount the cutting tool.

Machines with cutting head:

•

Trim line to correct length:

Lines must extend as far as line

limiting blade on the deflector

•

Carry out the basic setting.

•

Warm up engine by running

it

for

about 1 minute at full throttle and

then return

to

idle speed.

•

Back off high speed adjusting screw

(H)

one half turn (counterclockwise).

•

Run engine at full throttle and rotate

high speed adjusting screw

(H)

carefully clockwise until you hear

38

no further increase

in

RPM -

back off screw one eighth turn.

Machines with metal cutting tool:

A tachometer is necessary for the

following adjustment.

If

no tachometer

is

available,

.....

,.

do not turn screws beyond the basic

setting.

•

Carry out the basic setting.

•

Warm up engine by running

it

for

about 1 minute at full throttle and

then return to idle speed.

•

Back off high speed adjusting screw

(H)

one half turn (counterclockwise).

•

Run engine at full throttle and

rotate high speed adjusting screw

(H)

carefully clockwise until

maximum permissible speed

of

12,000 RPM

is

reached.

Turning the screw

(H)

any further

in the clockwise direction will

make the fuel-air mixture too

lean -

this could damage the engine!

Stihl FS 88 Instruction Manual - Page 39

FS 108

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