Maintenance Schedule - Briggs & Stratton 91400 Operating & Maintenance Instructions

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 5
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. (see fig.
Gear reduction, if equipped
Ë
Remove oil fill plug and oil level plug
every 100 hours of operation or every season. To refill,
pour SAE 30 oil into oil fill hole until it runs out level
check hole. Replace both plugs. Oil fill plug has a vent
Í
hole and must be installed on top of gear case cover.
Air cleaner service (see fig. )
Ë
Replace pre cleaner and/or cartridge
or damaged.
1. Loosen screws. Then remove cover and air
cleaner assembly from base.
2. Remove air cleaner assembly from inside of
cover and disassemble.
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.
Í
3. Reassemble retainer , pre cleaner (screen
side of pre cleaner toward cartridge pleats) and
cartridge in cover.
Î
4. Insert tabs on cover into slots
Tighten cover screws securely.
Maintenance Cont'd
)
Spark plug service (see fig.
DO NOT crank engine with spark plug removed. If
engine is flooded, place throttle in FAST and crank until
engine starts.
Clean/replace spark plug every 100 hours or every
season, whichever occurs first. (if spark plug is slanted,
use P/N 496018; if straight up, P/N 492167 or 802592.)
Ð
Spark plug gap
tester and spark plug wrenches 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.

)
Keep engine clean (see fig.
Ì
Periodically remove chaff and debris build up from
. Drain oil
engine. Do not spray engine with water to clean
because water could contaminate fuel. Clean with a
brush or compressed air.
Ì
if very dirty
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.
To assure smooth operation, keep governor linkage,
springs and controls
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
Î
in base.
)
DO NOT check for spark with
spark plug removed. Use
only Briggs & Stratton Spark
Ï
Tester , to check for spark.
should be .76 mm or 0.030 in. Spark
)
Accumulation of debris around muf
Ë
fler could cause a fire. Inspect
and clean before every use.
Ì
Í
free of debris.
Î
.
4

Maintenance Schedule

Follow the hourly or calendar intervals, whichever
occur first. More frequent service is required when
operating in adverse conditions noted below.
First 5 Hours
D Change oil
Every 5 hours or daily
D Check oil level
D Clean around muffler, springs and linkage
Every 25 hours or every season
D Change oil if operating under heavy load or
high ambient temperature
D Service air cleaner pre cleaner*
Every 50 hours or every season
D Change oil
D Clean and inspect spark arrester, if equipped.
Every 100 hours or every season
D Service air cleaner cartridge*
D Replace/clean spark plug
D Change gear reduction oil, if equipped
D Clean cooling system*
* Clean more often under dusty conditions,or
when airborne debris or chaff is present.
Partial List of Genuine Briggs & Stratton Parts
Briggs & Stratton (or equivalent)
,
Part
Oil (20 oz.) . . . . . . . . . . . . . . . . . . . . . . . .
Oil pump kit (uses standard electric drill
to remove oil from engine quickly)
Fuel stabilizer (1 oz., 30 ml single use pouch) 992030
Fuel stabilizer (4.2 oz., 125 ml bottle)999005E (5041)
Air cleaner cartridge . . . . . . . . . . . . . . . . .
Air cleaner pre cleaner . . . . . . . . . . . . . . .
Resistor spark plug (slanted in head)
Long life platinum spark plug (slanted in head)
Resistor spark plug (straight up in head)
Standard spark plug (straight up in head)
Long life platinum spark plug (straight up in head)5062
Spark tester . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug wrench . . . . . . . . . . . . .
Spark arrester . . . . . . . . . . . . . . . . . . . . . .
Part No.
100005
. . . . . 5056
494511
492889
. . . . 496018E
. . . 5066
. . 802592E
. 492167E
19368
89838 (5023)
690813