Specifications - Stihl FR 235 Instruction Manual

19 Specifications

18.3 Standard Setting
► Shut off the engine.
H
► Turn the high speed screw (H) counterclock‐
wise as far as stop.
► Turn the low speed screw (L) clockwise as far
as stop.
► Turn the low speed screw (L) 3/4 of a turn
counterclockwise.
18.4 Adjusting Idle Speed
► Carry out the standard setting.
► Start the engine.
► Warm up the engine by opening and closing
the throttle for about 1 minute.
Engine stops while idling
► Turn the idle speed screw (LA) clockwise until
the cutting attachment begins to rotate.
► Turn the idle speed screw (LA) one full turn
counterclockwise.
Erratic idling behavior or poor acceleration
► Turn the low speed screw (L) clockwise or
counterclockwise until the engine runs and
accelerates smoothly.
Cutting attachment rotates when engine is idling
► Turn the idle speed screw (LA) counterclock‐
wise until the cutting attachment stops rotat‐
ing.
► Turn the idle speed screw (LA) one full turn
counterclockwise.
0458-527-0121-B
L
18.5 Clearing the Combustion
Chamber
► Pull off the spark plug boot (1).
► Unscrew the spark plug (2).
► Dry the spark plug (2).
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.
► Move the slide control to position
before pulling the starter grip.
► Move the slide control to position .
► Pull the starter grip (3) several times and
guide it back slowly.
The combustion chamber is cleared.
► Insert and tighten down the spark plug (2)
firmly.
► Connect the spark plug boot (1) and press it
down firmly.
19 Specifications
19.1 STIHL FR 235 Trimmer
– Displacement: 36.3 cc
– Engine power to ISO 8893: 1.55 kW (2.1 bhp)
at 9,000 rpm
– Idle speed: 2,800 rpm
– Max. output shaft speed: 7,900 rpm
– Approved spark plug: Bosch WSR 6 F from
STIHL
– Electrode gap: 0.5 mm
– Dry weight without cutting attachment and
deflector: 10.3 kg
– Length without cutting attachment: 2750 mm
– Max. fuel tank capacity: 810 cc (0.81 l)
English
1
2
3
21