Control Adjustments - Briggs & Stratton 28N700 Operating And Maintenance Instruction Manual

ADJUSTMENTS
CONTROL ADJUSTMENTS
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Prevent unintentional stading.
Before pedorming adjustments:
. Remove spark plug wire from spark plug.
. Disconnect battery at negative terminal (only
engines with electric start).
TO ADJUST REMOTE CHOKE
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t1l Hold choke controlto CHOKE or START position.
l2l
Loosen casing clamp screw.
l3l Pull casing, wire and choke lever in direction of
arrow to end of travel.
4l Tighten casing clamP screw
TO ADJUST REMOTE THROTTLE
lf the engine does not stad or if it runs roughly, the remote
throttle control may need adjustment. See your authorized
Briggs & Stratton dealer or follow the instructions below.
CARBURETOR ADJUSTMENT
WARNING
The manufacturer of the equipment on which this
engine is installed specifies top speed at which the
ine will be operated. DO NOT EXCEED this speed.
Differences in fuel, temperature, altitude or load may require
minor carburetor adjustment. Air cleaner and its cover must
be assembled to carburetor before stafting engine.
The carburetor on this engine is equipped with an idle
mixture valve with a limiter (see inset), which allows some
adjustment, and an idle speed adjustment screw.
TO ADJUST CARBURETOR
Note: Engines operated at approximately 3000 to 5OOO feet
(900 to 1500 meters) above sea level may require a high alti-
tude carburetor nozzle. lf erratic pedormance is observed,
contact a Briggs & Stratton Authorized Service Dealer for cost
to install/purchase
a high altitude carburetor nozzle.
G O V E R N O R
r r u r
c o N T R o L L E V E R
FAST
S W I T C H
G O V E F N O R C O N T R O L R A C K
C A S I N G C L A M P S C R E W
t1l Move remote throttle control to FAST position.
l2l
Hole in governor control lever (located just behind
governor control plate) must align with hole in
governor control plate, as illustrated above.
lf holes do not line up, loosen casing clamp screw
and then move governor control rack until it does.
Tighten casing clamp screw.
Check operation of throttle. Move throttle control to
STOP oosition.
Governor control lever must make good contact with
stop switch (if equipped). Readjust if necessary.
H O L E I N
G O V E R N O R
CONTROL PLATE
f1
L_l slow
t3l
t4l
t5l
t6l
s
I D L E N / I X T U R E
VALVE
I D L E
S P E E D
S C R E W
WITH LII\,'IITER
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ano warm up
t1l To adjust idle speed, starl engine
about 5 minutes.
l2l With engine running, place equipment throttle
control in SLOW Position.
t3l Rotate carburetor throttle lever against the idle
speed screw and hold it. Turn idle speed screw to
obtain 1750 rpm (use a tachometer).
t4l Then rotate idle mixture valve full travel clockwise
and then counterclockwise.
Note: DO NOT remove limiter caps. DO NOT
force beyond limits.
tsl Then, position idle mixture valve in middle of travel.
t6l Check idle speed. Re-adjust to 1750 rpm, if needed.
l7l Move throttle control to FAST position. Ettgine
should accelerate smoothly. lf it does not, adjust
idle mixture valve counterclockwise
1/B turn.
1 4