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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
Choke Control (if equipped)
2
Breather/Breather tube
3
Spark Plug (2 locations)
4
Engine Model Label
Model xxxxxx Type xxxxxx Code xxxxxxxx
5
Oil Pressure Sensor
6
Oil Filter
7
Oil Drain Plug (2 locations)
8
Rotating Screen
9
Cover − Carburetor
10
Carburetor or LPG/NG Mixer
11
Mechanical Fuel Pump
12
Air Cleaner
13
Oil Fill
14
Dipstick
15
Regulator/Rectifier
16
Starter Solenoid
17
Starter
18
Exhaust System/Muffler
19
Throttle control (2 locations)
Record your engine Model, Type and Code numbers here
for future use.
Record your date of purchase here for future use.
TECHNICAL INFORMATION
Engine Power Rating Information
The gross power rating for individual gas engine models is
labeled in accordance with SAE (Society of Automotive
Engineers) code J1940 (Small Engine Power & Torque
Rating Procedure), and rating performance has been
obtained and corrected in accordance with SAE J1995
(Revision 2002-05). Actual gross engine power will be lower
and is affected by, among other things, ambient operating
conditions and engine-to-engine variability. Given both the
wide array of products on which engines are placed and the
variety of environmental issues applicable to operating the
equipment, the gas engine will not develop the rated gross
power when used in a given piece of power equipment
(actual on-site" or net horsepower). This difference is due to
a variety of factors including, but not limited to, accessories
(air cleaner, exhaust, charging, cooling, carburetor, fuel
pump, etc.), application limitations, ambient operating
conditions (temperature, humidity, altitude), and engine-to-
engine variability. Due to manufacturing and capacity
limitations, Briggs & Stratton may substitute an engine of
higher rated power for this Series engine.
GENERAL INFORMATION
This is a twin cylinder, overhead valve (OHV), air-cooled
engine. It is a low emissions engine.
In the state of California, Model 540000 and 610000
engines are certified by the California Air Resources Board
to meet emissions standards for 1000 hours. Such
certification 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 540000
Bore 85.5 mm (3.36 in.). . . . . . . . . . . . . . . . . . . . . . .
Stroke 78 mm (3.07 in.). . . . . . . . . . . . . . . . . . . . . . .
Displacement 895 cc (54.6 cu. in.). . . . . . . . . . . . . . .
Model 610000
Bore 85.5 mm (3.36 in.). . . . . . . . . . . . . . . . . . . . . . .
Stroke 86.5 mm (3.04 in.). . . . . . . . . . . . . . . . . . . . .
Displacement 993 cc (60.6 cu. in.). . . . . . . . . . . . . . .
Note:
For practical operation, the horsepower loading
should not exceed 85% of rated horsepower. Engine power will
decrease 3-1/2% for each 1,000 feet (300 meters) above sea
level 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 − 0.20 mm (0.005 − 0.008 in.). . .
Spark plug gap 0.76 mm (0.030 in.). . . . . . . . . . . . . . .
Valve clearance with valve springs installed and piston 6 mm
(1/4 in.) past top dead center (check when engine is cold).
Intake 0.10 − 0.15 mm (0.004 − 0.006 in.). . . . . . . . . . .
Exhaust 0.10 − 0.15 mm (0.004 − 0.006 in.). . . . . . . . .
SAFETY SPECIFICATIONS
• Read entire Operating & Maintenance Instructions
AND the instructions for the equipment this engine
powers.*
• Failure to follow instructions could result in serious
injury or death.
BEFORE OPERATING
ENGINE
* 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.
• 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 OPERATING & MAINTENANCE
INSTRUCTIONS CONTAIN SAFETY
INFORMATION TO:
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.
The engine exhaust from this product contains chemi-
cals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
WARNING
Hazard Symbols and Meanings
Explosion
Toxic Fumes
Shock
Hot Surface
Kickback
Fire
Moving Parts
Frostbite
Wear Eye Protection
International Hazard Symbols and Meanings
Stop
Fuel Shutoff
Read Operator’s
Manual
Fuel
Choke
Safety Alert
Oil
On Off
Starting engine creates sparking.
Sparking can ignite nearby flammable
gases.
Explosion and fire could result.
• If there is natural or LP gas leakage in area, do not
start engine.
• Do not use pressurized starting fluids because
vapors are flammable.
WARNING