Briggs & Stratton Vanguard 50000 Instrucciones De Mantenimiento & Operación página 6

Maintenance

(see figs.
See Maintenance Schedule. Follow the hourly or
calendar intervals, whichever occur first. More frequent
service is required when operating in adverse conditions.
To prevent acci
dental starting, re
move spark plug
wire Ê and ground
it before servicing,
and disconnect battery at negative terminal, if equipped.
Oil service (see fig. )
Check oil level regularly.
Be sure correct oil level is maintained. Check every 8
hours or daily, before starting engine. See oil filling
procedure under Oil Recommendations.
Change oil.
Change oil after first 5 hours of operation. Change oil
while engine is warm. Refill with new oil of recom
mended SAE viscosity grade.
Air cleaner service (see fig. )
Ë
Replace pre cleaner , and/or cartridge
or damaged.
1. Loosen screws. Remove cover and air cleaner
assembly from base.
Í
2. Remove cartridge (retainer
pre cleaner.
To service pre cleaner, wash in liquid detergent and
water. Squeeze dry in a clean cloth. Saturate in engine
oil. Squeeze in clean, absorbent cloth to remove ALL
EXCESS oil.
To service cartridge, clean by tapping gently on a flat
surface. Do not use petroleum solvents, e.g., kero
sene, which will cause cartridge to deteriorate. Do not
use pressurized air, which can damage cartridge. Do
not oil cartridge.
3. Reinstall pre cleaner on retainer, if equipped.
4. Install pre cleaner in cover with mesh side toward
cartridge. Install cartridge in cover or on base.
5. Seat cover and air cleaner assembly squarely
Î Ï
onto base (tabs into slots
6. Tighten cover screws securely.
Check valve clearance:
intake is .05 mm and exhaust .10 mm.

Spark plug service (see fig. )
DO NOT check for spark with
spark plug removed. Use
only Briggs & Stratton Spark
Tester Ë, to check for spark.
DO NOT crank engine with spark plug removed. If
engine is flooded, place throttle in FAST and crank until
engine starts.
Spark plug gap Ì should be .76 mm or 0.030 in.
Replace spark plug every 100 hours or every season,
whichever occurs first. Spark tester and spark plug
wrench are available from any Authorized Briggs &
Stratton Service Dealer.
Note: In some areas, local law requires using a resistor
spark plug to suppress ignition signals. If this engine
was originally equipped with resistor spark plug, use
same type of spark plug for replacement.
Maintenance Cont'd
)
Keep engine clean (see fig.
Periodically remove chaff and debris build up from
engine. Do not spray engine with water to clean
because water could contaminate fuel. Clean with a
brush or compressed air.
To assure smooth operation, keep governor linkage,
springs and controls free of debris
If muffler is equipped with spark arrester screen
remove spark arrester screen for cleaning and inspec
tion every 50 hours or every season. Replace if
damaged.
Clean cooling system. Chaff or debris may clog engine's
air cooling system, especially after prolonged operation.
Internal cooling fins and surfaces may require cleaning
to prevent overheating and engine damage. Remove
blower housing and clean as shown
Clean fuel filter (see fig.
Ì
if very dirty
fuel shut off valve before cleaning filter.
LPG / NG Engines: If equipped, follow equipment
, if equipped) and
manufacturers recommended maintenance in
structions.
Adjustments
it before adjusting, and disconnect battery at negative
terminal, if equipped.
Throttle control adjustments (see fig.
Manual friction throttle control
If adjustment is required, loosen or tighten lock nut
, if equipped).
until throttle control
position.
Fixed governor control
Adjustable governor control has been set to permit top
no load rpm specified by equipment manufacturer. If
adjustment is required, consult any Briggs & Stratton
Authorized Service Dealer.

)
Í
.
Accumulation of debris around muf
fler Î could cause a fire. Inspect and
clean before every use.
Î
Ï
.
)
Gasoline Engines: Clean fuel filter
Ë
screen . Drain fuel tank or close
To prevent acci
dental starting, re
move spark plug
wire Ê and ground
)
Ë
Ì
moves easily, but stays in set
4
Adjustments Cont'd
Carburetor adjustment - Gasoline Engines
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.
See an Authorized Briggs & Stratton Dealer for
carburetor adjustment.
Start engine and warm up approximately 5 minutes
before adjusting. With engine running, place throttle
control in SLOW position. Rotate carburetor throttle lever
against the idle speed screw and hold it. Turn idle speed
screw to obtain 1300 rpm. While still holding carburetor
,
throttle lever against idle speed screw, turn idle mixture
valve with limiter cap midway between limits. Release
carburetor throttle lever.
Adjust governed idle speed screw to 1400 rpm, set to
1750 rpm on Model Series 235400 and 245400. Move
throttle control to FAST position. Engine should acceler
ate smoothly. If it does not, adjust carburetor idle mixture
valve counterclockwise 1/8 turn.
(If Top Speed requires adjustment, see equipment
manufacturer's specifications.)
TOP SPEED
SCREW
GOVERNED
IDLE SPEED
SCREW
CARBURETOR
THROTTLE
LEVER
IDLE MIXTURE
VALVE WITH
LIMITER CAP
IDLE SPEED
SCREW
IDLE MIXTURE VALVE
WITH LIMITER CAP
CARBURETOR
THROTTLE
LEVER
IDLE SPEED
SCREW
MODEL SERIES 050000, 086400 & 118400
Mixer adjustment - LPG / NG Engines
The LPG / NG fuel mixer has a pre set adjustment. If
adjustment is needed, see a Briggs & Stratton Autho
rized Service Dealer who has been licensed by the
state or local municipality (if required) in which the
service is performed. Mixer adjustment requires spe
cial equipment and a qualified technician.