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Adjustments, Carburetor adjustment warning – Briggs & Stratton 420000 User Manual

Page 15

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Document: - page 15 (Black)

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15

ADJUSTMENTS

TO ADJUST REMOTE THROTTLE CONTROL

If the engine does not start or if it runs roughly, the remote

throttle control may need adjustment. See your authorized

Briggs & Stratton dealer or follow the instructions below.

[1] Remove air cleaner.
[2] Move throttle control to FAST. (Swivel should be

against side of quarter circle.)

[3] If not, loosen casing clamp screw. Move casing

and wire in direction shown by arrow until swivel is

against side of quarter circle.

[4] Tighten casing clamp screw. Replace air cleaner.

SWIVEL

QUARTER CIRCLE

CASING

CLAMP

SCREW

CASING

CLAMP

SCREW

CARBURETOR ADJUSTMENT

WARNING

The manufacturer of the equipment on which this

engine is installed specifies top speed at which the

engine will be operated. DO NOT EXCEED this speed.

Differences in fuel, temperature, altitude or load may

require minor carburetor adjustment. Air cleaner and air

cleaner cover must be assembled to carburetor before

starting engine.

The carburetor on this engine is low emission. It is

equipped with an idle speed adjustment screw and a

non-adjustable idle mixture valve.

Note: Engines operated at approximately 3000 to 5000 feet

(900 to 1500 meters) above sea level may require a high alti-

tude carburetor main jet. If erratic performance is observed,

contact a Briggs & Stratton Authorized Service Dealer for cost

to install/purchase a high altitude carburetor main jet.

TO ADJUST CARBURETOR

[1] Start engine and warm up approximately 5 minutes

before adjusting.

[2] With engine running, place throttle control in SLOW

position.

[3] Rotate carburetor throttle lever against the idle

speed screw and hold it.

[4] Turn idle speed screw to obtain 1500 to 1600 rpm.
Note: Governed idle has been set to 1750 rpm at factory.

IDLE

SPEED

SCREW

CARBURETOR

THROTTLE

LEVER

NON-ADJUSTABLE

IDLE MIXTURE JET

Add

sa

les

ta

x if

you

liv

e in

any

of

the

follow

ing

stat

es

:

**A

L

5%

, CT 6

%

, FL

6

.5

%

, G

A

4%

, K

Y

6%

, MI 6

%

, MN 6

%

,

M

O

4.225%,

N

Y

8.5%,

O

H

5%,

T

N

6%,

T

X

6.25%,

W

A

6.5%,

W

I 5

%

Payment Method:

Fill in both s

ides

of this

or

der

for

m

c

ar

efully

j

Check or money order enclosed payable to

Briggs & Stratton Corporation

in the amount of $_______

(U.S. Dollars, please)

j

Please charge my

j

MasterCard

j

VISA

CREDIT CARD NUMBER

SIGNA

TURE (REQUIRED FOR CREDIT CARD ORDERS)

EXPIRA

TION DA

TE

Parts List

Shipping & Handling

**Add State Sales T

ax

Total

$2.00

$1.50

To

purchase a complete list of Genuine Briggs & Stratton Parts for your engine, fill in

both sides of this order form carefully

.

W

e cannot fill your order without the correct

Engine Model/T

ype/Code.

Allow 3 to 4 weeks for delivery

.