Craftsman 917.275283 - Manual (Page 27)

ENGINE
Maintenance, repair, or replacement of
the emission control devices and systems,
which are being done at the customers ex­
pense, may be performed by any non-road
engine repair establishment or individual.
Warranty repairs must be performed by an
authorized engine manufacturer's service
outlet.
TO ADJUST THROTTLE CONTROL
CABLE
The throttle control has been preset at the
factory and adjustment should not be nec­
essary. Check adjustment as described
below before loosening cable. If adjust­
ment is necessary, proceed as follows:
1. With engine not running, move throttle
control lever to fast position.
2. Check that speed control lever is
against stop screw. If it is not, loosen
casing clamp screw and pull throttle
cable until lever is against screw.
Tighten clamp screw securely.
Closed
Choke
Idle Fuel
Adjusting
Needle
Stop
Screw
Idle speed
Adjusting
Screw
Throttle
Control
Cable
Choke
Control
Cable
Clamp Screw
TO ADJUST CHOKE CONTROL
The choke control has been preset at the
factory and adjustment should not be nec­
essary. check adjustment as described be­
low before loosening cable. If adjustment
is necessary, proceed as follows:
1. With engine not running, move choke
control (located on dash panel) to full
choke position.
2. Remove air cleaner cover, filter and
cartridge plate to expose carburetor
choke (See “AIR FILTER” in the Main­
tenance section of this manual).
3. Choke should be closed. If it is not,
loosen casing clamp screw and move
choke cable until choke is completely
closed. Tighten casing clamp screw
securely.
4. Reassemble air cleaner.
TO ADJUST CARBURETOR
The carburetor has been present at the
factory and adjustment should not be nec­
essary. However, minor adjustment may
be required to compensate for differences
in fuel, temperature, altitude or load. If the
carburetor does need adjustment, proceed
as follows:
In general, turning the adjusting needles
in (clockwise) decreases the supply of
fuel to the engine giving a leaner fuel/air
mixture. Turning the adjusting needles out
(counterclockwise) increases the supply
of fuel to the engine giving a richer fuel/air
mixture.
IMPORTANT: Damage to the needles
and the seats in carburetor may result if
screw is turned in too tight.
PRELIMINARY SETTING -
1. Be sure you have a clean air filter, and
the throttle control cable is adjusted
properly (see “TO ADJUST THROTTLE
CONTROL CABLE” in the Service and
Adjustments section of this manual).
2. With engine off turn idle fuel adjust­
ing needle in (clockwise) closing it
finger tight and then turn out (counter­
clockwise) 1 turn.
FINAL SETTING -
1. Start engine and allow to warm for five
minutes. Make final adjustments with
engine running and shift/motion control
lever in neutral (N) position.
NOTE: The high idle is set at the factory
and cannot be adjusted.
2. Idle speed setting - With throttle control
lever in slow position, engine should
idle at 1200 RPM. If engine idles too
slow or fast, turn idle speed adjusting
screw in or out until correct idle is at­
tained.
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