Adjustments, Carburetor adjustment warning – Briggs & Stratton 420000 User Manual
Page 15
Document: - page 15 (Black)
Screen angle and frequency: 45.0000, 150.0000
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
.