To adjust carburetor, Service and adjustments – Sears 536.886331 User Manual
Page 25
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
SERVICE AND ADJUSTMENTS
TO REPLACE AUGER SHEAR BOLT
The augers are secured to the auger shaft with special
bolts
(See FIG. 16)
that are designed to break
(to protect
the machine)
if an object becomes lodged in the auger
housing. Use of a harder bolt will destroy the protection
provided by the shear bolt.
IMPORTANT: TO INSURE SAFETY AND PERFOR
MANCE LEVELS. ONLY ORIGINAL
EQUIPMENT SHEAR B O L T S
SHOULD BE USED. WHEN REPLAC
ING SHEAR BOLTS, BE SURE TO
REPLACE SHEAR BOLT SPACERS.
To replace a broken shear bolt, proceed as follows:
•
Move the throttle to STOP and turn off all controls.
•
Disconnect the spark plug wire. Be sure all moving
parts have stopped.
•
Remove the broken shear boll.
•
Lubricate the auger shaft zerk fitting
(See the
Customer Responsibilities section in this manual).
•
Align the hole in the auger with the hole in the auger
shaft. Install the new shear bolt and shear bolt spacer
provided.
•
Reconnect the spark plug wire.
TO ADJUST CARBURETOR
The carburetor
(See FIG. 17 and (FIG.
1
Storage)
has
been pre-set at the factory and readjustment should not be
necessary. However, if the carburetor does need to be
adjusted, proceed as follows;
•
Close the high speed adjusting screw by hand.
•
Do not over-tighten.
•
Then open it 1-1/4 to 1-1/2 turns.
•
Close the idle adjusting screw by turning clockwise by
hand. Do not over-tighten.
•
Then open it 1-1/4 to 1-1/2 turns.
•
Start the engine and let it warm up,
•
Set the throttle control to
RUN.
Adjust the high speed
adjusting screw
in
until the engine speed or sound
alters. Adjust the screw
out
until the engine speed
sound alters. Note the difference between the two
limits and set the screw in the middle of the range.
•
Set the throttle control to
SLOW.
Adjust the idle
adjusting screw
in
until the engine speed drops, then
adjust the screw
out
until the engine speed drops.
Note the difference between the two limits and set the
screw in the middle of the range.
•
If the engine tends to stall under load or not accelerate
from low speed to high speed properly, adjust the high
speed screw out in 1/8 turn increments until the
problem is resolved.
FIG. 16
.CARBURETOR
BOWL DRAIN
IDLE ADJUSTING SCREW
(Close finger tight only)
HIGH SPEED ADJUSTING
SCREW
(Close finger tight only)
FIG. 17
• Let the engine run undisturbed for 30 seconds be
tween each setting to allow the engine to react to the
previous adjustments.
IMPORTANT:
NEVER TAMPER WITH THE ENGINE
GOVERNOR, WHICH IS FACTORY
SET FOR PROPER ENGINE SPEED.
OVERSPEEDING
THE
ENGINE
ABOVE THE FACTORY HIGH SPEED
SETTING CAN BE DANGEROUS. IF
YOU
THINK
THE
ENGINE
■
GOVERNEDHIGHSPEEDNEEDS
AD
JUSTING,
CONTACTYOUR
NEAR
EST
SEARS
SERVICE
CENTER.
WHICH HAS THE PROPER EQUIP
MENT AND EXPERIENCE TO MAKE
ANY NECESSARY ADJUSTMENTS.