Poulan 195 - Manual (Page 19)

D. CARBURETOR ADJUSTMENTS
NOTE: This is a complicated task. Read all warnixigs and instructions thoroughly before starting ad>
justments. If you do not think that you completely understand all warnings and instructions, let your
Authorized Service Dealer perform these adjustments.
A
DANGER
Make carburetor adjustments with the lawer
end supported to prevent blade or trimmer line
^omcontaeting any object. Hold unit with your
hand; do not use optional shoulder strap for sup~
port. ______
A WARNING
Keep others away when making carburetor ad­
justments.
A wabning
Serious ipju>7 to the operator and others can oc-
cur if the carburetor is not properly adjusted.
• Poor engine performance can be a result of
othm* causes such as dirty air filter, carbon
build-up on muffler outlets, etc. See
“Trouble Shooting Chart” before proceed­
ing with carburetor adjustments.
• Hie carburetor has been carefully adjusted
^^hefactory. However, &e operator must^
be sure that adjustments are made when
any of the conditions occur as mentioned on
the nest pa^ in “Troiible Shooting Sugges­
tions”.
• Very small adjustments can affect engine
performance. It is important to turn the screw a
veiy small amoimt per adjustment and test per­
formance before making further adjustments.
Each adjustment should be no more than the
width of the slot in the adjusting screw.
e This is a complicated task and it is impor­
tant to follow instructions in sequence as
indicated.
1. TROUBLE SHOOTING SUGGESTIONS
— Engine will not continue to run at idle posi­
tion. See “Idle Speed Adjustment” and ^Low
Speed Mixture Adjustment.”
— Blade or trimmer head contmues to ^in when
the engine idles. See “Idle Speed Adfustment”
and “Deceleration Check,”
— Engine dies or hesitates when it should accel-
er^. See “Acceleration Check.”
— Loss of cutting power which cannot be cor­
rected by cleaning the air filter. See “High
^»eed Mixture Adjustment,”
— Engine does not return to idle from full throt­
tle within 2 seconds. See “Deceleration
Check,”
— Engine will not run. See “Trouble Shooting
Ch^.” Then, if the carburetor requires ad­
justment, begin with “Basic Carburetor Set­
tings.”
A WARNING
The blade or trunmer line will be ginning dur­
ing most of tills procedure. Wear protective
equipment and observe all safely iusbructions.
2. BASIC CARBURETOR SETTINGS
NOTE: Inmost cases, your engine can he made to
run properly with minor carburetor adjustments.
Refer to “Trouble Shooting Suggestions” in the
left column for the condition you are e^eriencing
and follow the instructions. The basic carburetor
settings are provided below.
a.
Turnthelowspeedmixture screw and the h^h
^eed mixture screw (Figure 25) clockwise
until thej^ stop. Do not turn the screws until
th^ are tight as damage to the needle seats can
occur,
b. Turn the low speed mixture and hi^ speed
mixture screws between three-quarters and
one full turn counterclockwise.
3. ADJUSTING PROCEDURE
a. PREPARATION
1. Use a fi‘esh fuel mix. See “Fuelinglibur En­
gine.”
2. Make sure the hne extends to the length al­
lowed by the line limiter to provide correct
load on ei^ine,
3. Start the engine. Cutlass for 3 minutes to
warm engine. The engine must be at operat-
Чщт1етрёгаШгё^Ьф)ге сагЪигеШГаб^гШЬ-^
ments can be performed correctly,
b. IDLE SPEED ADJUSTMENT
1. Allow engine to idle.
2. Adjust idle ^eed screw (Figure 25 ) until
engine continues to run without stalling
and without blade or trimmer head moving.
— Turn screw clockwise to increase engine
speed if the engine stalls or dies,
— Turn screw counterclockwise to slow en­
gine down andjor to keep blade or trim­
mer head from turning.
3. FoHow instructions in “Acceleration
Check” and “Deceleration Check.”
4. No further adjustments are necessary
if the blade or trimmer head does not
turn at idle speed and if performance
is satisfactory.
A WARNING
Recheck idle speed after each adjustment. The
blade or trimmer head must not turn at idle
sp^d to avoid serious izdury to the operator
ahdothers. ___ _________
c. ACCELERATION CHECK
1, Allow engine to idle.
2. Squeeze trigger fully
a If performance is satisfactory, pro­
ceed to “d. Decelm-atioh Check.”
b. If the engine does not accelerate
smoothly, turn the low speed mixture
screw (Figure 25) counterclockwise a
small amount (no more than the width
of the slot in the adjusting screw).
3. Repeat step “2,)” until smoo& acceleration
is obtained.
NOTE: It maybe necessary to repeat “Idle Speed
Adjustment” through “Acceleration Check,’* to
obtain correct adjustments.
4, Follow instructions in “Deceleration
Check,”
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