Fuel Recommendations; Carburetor Adjustments - Briggs & Stratton 405700 Operator Owner's Manual

Oil Recommendations
Engine shipped from Briggs & Stratton without oil. Before
starting engine, fill with oil. Do not over fill.
Use a high quality detergent oil classified For Service SF, SG,
SH," such as Briggs & Stratton warranty certified" SAE 30 oil
(see fig. ). Use no special additives with recommended
A
oils. Do not mix oil with gasoline.
Choose the SAE viscosity grade of oil from this chart that
matches the starting temperature anticipated before the next

oil change. (see fig. )
* Air cooled engines run hotter than automotive engines.
The use of multi viscosity oil such as (10W 30, etc.) in
ambient temperatures above 405 F (45 C) will result in
higher than normal oil consumption. If multi viscosity oil is
used, check the oil level more frequently to prevent any
possible engine damage due to lack of lubrication.
** Use of SAE 30 oil below 405 F (45 C) will result in hard
starting and possible engine damage due to inadequa
te lubrication.

Check oil level (see fig. )
Oil capacity is about 1.8 liters (60 ounces) if engine is not
equipped with oil filter. Oil capacity is about 1.9 liters (64
ounces) if engine is equipped with oil filter.
Note: Oil capacity will be greater if engine is equipped with re
mote oil filter.
Place engine level and clean around oil fill
Ë
Remove dipstick , wipe with clean cloth, insert and tighten
down again. Remove dipstick and check oil level. Oil should be
Ì
at FULL mark . If oil is required, add slowly. Tighten dipstick
firmly before starting engine.
After filling with or changing oil, start and run engine at idle for
30 seconds. Shut engine off. Wait 30 seconds and check oil
level. Check for oil leaks. Add oil, if required, to bring level to
FULL mark on dipstick.

Fuel Recommendations

Use clean, fresh, regular lead free gasoline with a minimum of
85 octane. Leaded gasoline may be used if it is commercially
available and if unleaded is unavailable. Purchase fuel in
quantity that can be used within 30 days. See Storage.
In U.S.A. leaded gasoline may not be used. Some fuels, called
oxygenated or reformulated gasolines, are gasolines blended
with alcohols or ethers. Excessive amounts of these blends
can damage the fuel system or cause performance problems.
If any undesirable operating symptoms occur, use gasoline
with a lower percentage of alcohol or ether.
Do not use gasoline which contains Methanol. Do not mix oil
with gasoline.
For engine protection, we recommend using Briggs & Stratton
Gasoline Additive (see fig. ) available from an Authorized
B
Briggs & Stratton Service Dealer.
Check fuel level.
Clean around fuel fill before removing cap to refuel. Allow
space in the fuel tank for fuel expansion.
Before refueling, allow engine to cool 2 minutes.
 Starting
(see fig. )
Start, store and fuel lawn mower in level position. Start lawn
mower on hard surface or over previously cut grass.
Before starting engine (see fig.
If engine runs low on oil, an oil pressure switch (if engine is
equipped) will either activate a warning light. (Read the
operating instructions supplied by the equipment manufactu
rer.) See Oil pressure next page.
1. Open fuel shut off valve, if equipped.
2. Move choke control to CHOKE position
Note: If engine does not start, remove air cleaner to check cho
ke. Choke must fully close. If not, see Adjustments.
3. Move throttle control
Electric starter (see fig.
Turn key to START position
necessary with choke off and throttle control in FAST position.
Operate engine with choke off and throttle in FAST position.
Ê
.
Note: If equipment manufacturer has supplied battery, char
ge it before trying to start engine, as equipment manufacturer
recommends. Use short starting cycles (15 secs. per min.) to
prolong starter life. Extended cranking can damage starter mo
tor.
Stopping
Do not move choke control to CHOKE to stop engine. Backfire
or engine damage may occur. Move throttle control to IDLE or
SLOW position, then to STOP
Always remove key from switch when equipment is not in use
or left unattended.

(see figs. )
ALWAYS KEEP HANDS AND FEET CLEAR OF
MOWER BLADE AND/OR EQUIPMENT MOVING
PARTS.
Do not use a pressurized starting fluid. Starting fluid
is flammable. Severe engine damage or fire may
occur.

)
Ê
Ë
to FAST position.

)
Ê Ë
or press button
If engine is equipped with battery for electric
starter, do not operate engine with battery
disconnected.

(see fig. )
Ê
or turn key to OFF
When engine or equipment is transported, close
fuel shut off valve, if equipped, to prevent fuel
leakage.
2
Adjustments
To prevent accidental starting, remove spark plug
Ê
wire
disconnect battery at negative terminal before
adjusting.
Choke control adjustments
Remove air cleaner. Move choke control to CHOKE position.
Carburetor choke valve should be completely closed. If not,
loosen casing clamp screw
direction of arrow to end of travel. Tighten casing clamp screw.
Replace air cleaner.
Throttle control adjustments
Remove air cleaner. Move throttle control to FAST position.
Í
Swivel should be against throttle stop
Ï
casing clamp screw
by arrow until swivel is against throttle stop. Tighten casing
.
clamp screw. Replace air cleaner.
Check operation of controls. Readjust if necessary.

Carburetor adjustments

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.
. Repeat if
See an Authorized Briggs & Stratton Dealer for carburetor
adjustment.
The carburetor on this engine is low emission. It is not
adjustable, except for idle speed. Governed idle speed is 1750
rpm, set at the factory. In the U.S.A., if idle speed does require
adjusting, 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
1500 rpm. Release carburetor throttle lever. Move throttle
control to FAST position. Engine should accelerate smoothly.
IDLE
SPEED
SCREW
Ë
.
Carburetor adjustments
Note: Engines operated at approximately 3000 to 5000 feet
(900 to 1500 meters) or above sea level may require a high
altitude carburetor air bleed. If erratic performance is obser
ved, contact a Briggs & Stratton Authorized Service Dealer for
a high altitude carburetor air bleed.

(see fig. )
from spark plug and ground it and
Ë Ì
and pull casing and wire
Î
. If not, loosen
. Pull casing and wire in direction shown
CARBURE-
TOR
THROTTLE
LEVER
in