Loading ...
Loading ...
Loading ...
SERVICE AND ADJUSTMENTS
CARBURETOR ADJUSTMENTS
Carburetor adjustment is critical and if done improperly
can permanently damage the engine as well as the car-
buretor. Please read all instructions and consult the
Trouble Shooting section of this manual before begin-
ning this process. If the engine does not operate accord-
ing to these instructions after repeating the adjusting
steps, do not use the unit. For further assistance, please
call our customer assistance hotline at 1-800-235-5878.
WARNING:
THE IMPELLER WILL BE SPINNING DURING
THIS PROCEDURE. WEARYOUR PROTECTIVE
EQUIPMENT AND OBSERVE ALL SAFETY
INSTRUCTIONS.
KEEP OTHERS AWAYWHEN MAKING CARBU-
RETOR ADJUSTMENTS_
THE MIXTURE SEBrlNG IS A HIGHLY CRITI-
CAL ADJUSTMEI_,n". IF SET INCORRECTLY,
PERMANENT DAMAGE WILL OCCUR TO THE
ENGINE. DO NOT RUN ENGINE AT FULL
THROTTLE FOR PROLONGED PERIODS
WHILE MAKING THE MIXTURE ADJUSTMENT.
Very small adjustments can affect engine performance° It is
important to make slight ajustments and test performance
before proceeding, Each adjustment should be no more than
t/16th of a turn.,
o Turn the mixture screw counterclockwise to the limiter stop
° Turn idle speed screw clockwise 1/2 turn.
= If engine fails to start after performing carburetor presets,
the unit may be flooded. Review the "Difficult Starling"
section of the manual, if problems continue call the 1-800
number listed on the front cover of this manual for further
assistance°
° Start the engine and operate for three (3) minutes to warm
up.,Go to "Adjusting Procedure"
Idle Speed
Adjustment "O _1 I
Screw
Mixture
ustment
Screw
k
If engine does not start, it may be flooded If in doubt, read
the section on flooded engine in the starting section of this
manual prior to beginning any adjustments
The carburetor has been adjusted at thefactory for sea level
conditions. Adjustments may become necessary if the unit is
used at significantly higher altitudes or ifyou notice any of the
following conditions:
° Engine will not continue to run at idleposition. See "Idle
Speed Adjustment" and "Mixture Adjustment!'
. Engine dies or hesitates when it should accelerate,, See
"Acceleration Check,"
• Loss of power which cannot be corrected by cleaning air
filter. See "Mixture Adjustment"
NOTE: There are two adjustments on the carburetor.
• The Idle Speed Adjustment is marked withthe letter "T",
• The Mixture Adjustment is marked with the letter "M",
CARBURETOR PRESETS (Fig. 24)
ifyour enginewillnot start due to suspected impropercarbu-
retor adjustment, the following presets may be required if
used, it is recommended that all steps within the adjustment
procedure be completed in order to assure a properly set car-
buretor., If presets are not needed, proceed to section "Idle
Speed Adjustment:'
When making adjustments, be careful notto force the plastic
limiter caps beyond the stops or damage will occur.
Figure 24
ADJUSTING PROCEDURE
IDLE SPEED ADJUSTMENT "T"
• Allow engine to idle
° Adjust the idle speed until the engine continues to run with-
out staltingo
- Turn screw clockwise to increase engine speed,.
- Turn screw counterclockwise to slow engine down,
• No further adjustments are necessary if engine idles and
performance is satisfactory°
MIXTURE ADJUSTMENT "M"
IMPORTANT: Do not operate engine at full throttle for
prolonged periods while making mixture adjustments as
damage tothe engine can occur,
. Turn the mixture screwcountemlockwise until itstops, if the
engine accelerates and runs smoothly, no further adjust-
ments are necessary. If not continue to next step,
,, Turn the screw slowly the minimum amount clockwise until
the engine runs smoothly.,
° If the engine accelerates and runs smoothly, no further
adjustments are necessary.
ACCELERATION CHECK
° if the engine dies or hesitates instead of accelerating, turn
the mixture screw the width of the slot in the adjusting
screw at a time counterclockwise until you have smooth
acceleration.
• Check the idle speed for stability. Adjust as necessary..
° Recheck for smooth acceleration and stable idle.
• Repeat process as necessary for acceptable performance.
-19-
Loading ...
Loading ...
Loading ...