STIHL HL 100 (135 degree) Instruction Manual download pdf (Page 27)

HL 100, HL 100 K

English

25

N Carefully turn both adjusting screws

counterclockwise as far as stop.

High speed screw (H) is open a 3/4 turn,

and the low speed screw (L) is open a

3/4 turn.

N Start and warm up the engine.

N Adjust idle speed with the idle speed

screw (LA) so that the cutting

blades do not run.

Fine Tuning

A slight correction of the setting of the

high speed screw (H) may be necessary

if engine power is not satisfactory when

operating at high altitude or at sea level.

N Turn the high speed screw (H)

about one quarter of a turn for every

3300 ft (1000 m) change in altitude.

N Carry out the standard setting

without disturbing the high speed

screw (H).

N Warm up the engine for about 3

minutes.

N Open the throttle wide.

At high altitude

N Turn the high speed screw (H)

clockwise (leaner), no further than

stop, until there is no noticeable

increase in engine speed.

At sea level

N Turn the high speed screw (H)

counterclockwise (richer), no further

than stop, until there is no further

noticeable increase in engine

speed.

It is possible that maximum engine

speed may be reached with the standard

setting in each case.

Adjusting Idle Speed

It is usually necessary to change the

setting of the idle speed screw (LA) after

every correction to the low speed

screw (L).

N Warm up the engine for about 3

minutes.

Engine stops while idling

N Turn the idle speed screw (LA)

slowly clockwise until the engine

runs smoothly – the cutting blades

must not run.

Cutting blades run when engine is idling

N Turn the idle speed screw (LA)

counterclockwise until the cutting

blades stop running and then turn

the screw about another 1/2 to

3/4 turn in the same direction.

WARNING

If the cutting blades continue to run

when the engine is idling, have your

machine checked and repaired by your

servicing dealer.

Erratic idling behavior, engine stops

even though setting of LA

-

screw has

been corrected, poor acceleration

Idle setting is too lean

N Turn the low speed screw (L)

counterclockwise, no further than

stop, until the engine runs and

accelerates smoothly.

Erratic idling behavior

Idle setting is too rich

N Turn the low speed screw (L)

clockwise, no further than stop, until

the engine runs and accelerates

smoothly.

249BA051 KN

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