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Note: (This note applies only to engines used in the U.S.A.) Maintenance, replacement or repair of the emission control devices and systems may be performed
by any nonroad engine repair establishment or individual. However, to obtain no charge repairs under the terms and provisions of the Briggs & Stratton
warranty statement, any service or emission control part repair or replacement must be performed by a factory authorized dealer.
ENGINE COMPONENTS
Fig. 1
1
Oil Pressure Sensor
2
Spark Plug (2 locations)
3
Choke Control
4
Muffler
5
Throttle Control (2 possible locations)
6
Fuel Pump (if equipped)
7
Air Cleaner
8
Radiator and Radiator Cap
9
Radiator Screen and Handle
10
Fuel Filter
11
Oil Fill Cap
12
Dipstick
13
Oil Drain Plug (2 locations)
14
Starter
15
Starter Solenoid
16
Fan Belt
17
Radiator Drain Plug
18
Radiator Reservoir
19
Oil Filter
20
Engine Model Label
Model xxxxxx Type xxxxxx Code xxxxxxxx
Record your engine Model, Type and Code numbers here
for future use.
Record your date of purchase here for future use.
TECHNICAL INFORMATION
POWER RATINGS: The power ratings for an individual engine
model are initially developed by starting with SAE (Society of
Automotive Engineers) code J1940 (Small Engine Power &
Torque Rating Procedure) (Revision 2002 05). Given both the
wide array of products on which our engines are placed, and
the variety of environmental issues applicable to operating the
equipment, it may be that the engine you have purchased will
not develop the rated horsepower when used in a piece of pow
er equipment (actual on site" power). This difference is due to
a variety of factors including, but not limited to, the following:
differences in altitude, temperature, barometric pressure, hu
midity, fuel, engine lubrication, maximum governed engine
speed, individual engine to engine variability, design of the par
ticular piece of power equipment, the manner in which the en
gine is operated, engine run in to reduce friction and clean out
of combustion chambers, adjustments to the valves and car
buretor, and other factors. The power ratings may also be ad
justed based on comparisons to other similar engines utilized
in similar applications, and will therefore not necessarily match
the values derived using the foregoing codes.
GENERAL INFORMATION
This is a twin cylinder, overhead valve (OHV), liquid cooled
engine. It is a low emissions engine.
In the state of California, Model Series 470000 engines are
certified by the California Air Resources Board to meet
emissions standards for 250 hours; Model Series 610000
engines are certified by the California Air Resources Board
to meet emissions standards for 1000 hours. Such certifi
cation does not grant the purchaser, owner or operator of
this engine any additional warranties with respect to the
performance or operational life of this engine. This engine
is warranted solely according to the product and emissions
warranties stated elsewhere in this manual.
Model Series 470000
Bore
. . . . . . . . . . . . . . . . . . . . . . . .
Stroke
. . . . . . . . . . . . . . . . . . . . . .
Displacement
. . . . . . . . . . . . . . .
752 cc (45.9 cu. in.)
Model Series 610000
Bore
. . . . . . . . . . . . . . . . . . . . . . .
Stroke
. . . . . . . . . . . . . . . . . . . . .
Displacement
. . . . . . . . . . . . . . .
993 cc (60.6 cu. in.)
Note:
For practical operation, the horsepower loading should
not exceed 85% of rated horsepower. Engine power will de
crease 3 1/2% for each 1,000 feet (300 meters) above sea lev
el and 1% for each 10° F (5.6° C) above 77° F (25° C). Engine
will operate satisfactorily at an angle up to 25°.
TUNE UP SPECIFICATIONS
Armature air gap
. . . .
0.13 - 0.18 mm (0.005 - 0.007 in.)
Spark plug gap
. . . . . . . . . . . . . . . .
Valve clearance with valve springs installed and piston 6 mm
(1/4 in.) past top dead center (check when engine is cold).
Intake
. . . . . . . . . . .
0.18 - 0.25 mm (0.007 - 0.010 in.)
Exhaust
. . . . . . . . . .
0.18 - 0.25 mm (0.007 - 0.010 in.)
SAFETY SPECIFICATIONS
BEFORE OPERATING
ENGINE
• Read entire Operating & Maintenance Instruc
tions AND the instructions for the equipment this
engine powers.*
• Failure to follow instructions could result in
serious injury or death.
* Briggs & Stratton does not necessarily know what equip
ment this engine will power. For that reason, you should
carefully read and understand the operating instructions
for the equipment on which your engine is placed.
THE OPERATING & MAINTENANCE
INSTRUCTIONS CONTAIN SAFETY
INFORMATION TO:
• Make you aware of hazards associated with
engines
• Inform you of the risk of injury associated with
those hazards, and
• Tell you how to avoid or reduce the risk of injury.
The safety alert symbol
is used to identify safety
information about hazards that can result in personal injury.
A signal word (DANGER, WARNING, or CAUTION) is
used with the alert symbol to indicate the likelihood and the
potential severity of injury. In addition, a hazard symbol
may be used to represent the type of hazard.
DANGER indicates a hazard which, if not avoided,
will result in death or serious injury.
WARNING indicates a hazard which, if not avoided,
could result in death or serious injury.
CAUTION indicates a hazard which, if not avoided,
might result in minor or moderate injury.
,
CAUTION
when used without the alert symbol,
indicates a situation that could result in damage to
the engine.
WARNING
The engine exhaust from this product contains chemi
cals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
1
Hazard Symbols and Meanings
81 mm (3.19 in.)
73 mm (2.87 in.)
85.5 mm (3.36 in.)
Fire
86.5 mm (3.40 in.)
Toxic Fumes
International Hazard Symbols and Meanings
0.51 mm (0.020 in.)
Safety Alert
Fuel
Fuel Shutoff
WHEN ADDING FUEL
• Turn engine OFF and let engine cool at least 2
minutes before removing gas cap.
• Fill fuel tank outdoors or in well ventilated area.
• Do not overfill fuel tank. Fill tank to approximately
1 1/2 inches below top of neck to allow for fuel
expansion.
• Keep gasoline away from sparks, open flames,
pilot lights, heat, and other ignition sources.
• Check fuel lines, tank, cap, and fittings frequently
for cracks or leaks. Replace if necessary.
WHEN STARTING ENGINE
• Make sure spark plug, muffler, fuel cap and air
cleaner are in place.
• Do not crank engine with spark plug removed.
• If fuel spills, wait until it evaporates before starting
engine.
• If engine floods, set choke to OPEN/RUN
position, place throttle in FAST and crank until
engine starts.
WHEN OPERATING EQUIPMENT
• Do not tip engine or equipment at angle which
causes gasoline to spill.
• Do not choke carburetor to stop engine.
WHEN TRANSPORTING EQUIPMENT
• Transport with fuel tank EMPTY or with fuel
shut off valve OFF.
• On NATURAL / LIQUID PETROLEUM (LP) GAS
engines transport with fuel cylinder empty or valve
closed, or tank disconnected.
WHEN STORING FUEL OR EQUIPMENT WITH
FUEL IN TANK
• Store away from furnaces, stoves, water heaters
or other appliances that have pilot light or other
ignition source because they can ignite gasoline
vapors.
GB
Explosion
Hot Surface
Moving Parts
Kickback
Shock
Hot Liquid or
Steam
Choke
Read Operator's
Oil
Manual
Stop
On Off
WARNING
Gasoline and its vapors are extremely
flammable and explosive.
Fire or explosion can cause severe burns
or death.
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