Throttle Cable; Adjusting The Throttle Cable - Stihl SR 430 Manual

Adjustment for operation at high
altitude
A minor correction may be
necessary if engine power is not
satisfactory when operating at high
altitude.
– Check standard setting.
– Warm up the engine.
– Turn the high speed screw (H)
clockwise (leaner) – no further
than stop.
Turn the adjusting screws only very
slightly. Even minor adjustments
can noticeably affect engine running
behavior.
If the setting is made too lean there
is a risk of engine damage as a
result of lack of lubrication and
overheating.
If the adjustments produce no
improvement, see the
troubleshooting charts for the
ignition system, b 3.3, carburetor
and engine, b 3.4, b 3.5.
9.8

Throttle Cable

The throttle cable and wiring
harness form a single unit which
must be replaced as such if
damaged.
– Removing and installing the short
circuit wire, b 5.6
72
9.8.1 Adjusting the Throttle
Cable
The throttle cable must be adjusted
to ensure the throttle shutter opens
and closes properly.
– Remove the shroud, b 4.4
Checking adjustment of throttle
cable
: Squeeze the throttle trigger (1)
as far as stop and hold it there.
1
: Press down the throttle lever (1).
If the throttle lever (1) can be turned
further, the throttle shutter is not
wide open.

Adjusting the throttle cable

The throttle lever butts against the
idle speed screw (LA) when the
throttle trigger is fully
depressed (full throttle).
: Squeeze the throttle trigger and
turn the grub screw (arrow) until
the throttle shutter is wide open.
– Turn the grub screw clockwise
= throttle cable is tensioned
(throttle shutter opens)
– Turn the grub screw
1
counterclockwise
= throttle cable is relaxed (throttle
shutter closes)
: Release the throttle
trigger (arrow) – it must move
back to the idle position.
The throttle cable must not be under
tension when the throttle trigger is
released since the throttle shutter
may not close properly – the idle
speed will then be too high.
– Reassemble in the reverse
sequence.
SR 430, SR 450