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7/28/2019 Desempenho Do Motor

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BRIGGS & STRATTON CORPORATION

MODEL 20

APPLICATION BOOK

1) ENGINE SPEEDS AND POWER

Curb Idle: 1400 rpm

Governor Droop: Under 7% regulation for utility governing; 5% for generators.

Governed Idle: Available by adjusting the governed idle spring tang (1650 to1850 rpm) The curb idle speed must be adjusted at least 300 to 400 rpm below

governed idle speed.

2) ANGLE OF OPERATION

Running Running

Direction Continuous Intermittent Static

Carb Side Down 15

Carb Side Up 15 Consult ConsultFlywheel Down 15 Factory FactoryFlywheel Up 15

3) CRANKSHAFT LOADING

Ball Plain D/U

Bearing Bearing BearingMaximum Thrust Load 500 50 50*Maximum Radial Load 400 200 400*

*D/U bearing available as an option on the flywheel side only.

4) STARTING SYSTEM

Manual Rewind: Standard in the 10:30 oclock position with 1:30, 4:30 and 7:30oclock positions optional.

NOTE: Positions listed are rope handle positions.

Electric Start: Optional

Minimum Battery Size (0 F): 30 amp-hours (5W-20 oil)

5) FLYWHEEL

Inertia: 99.5 lb.-in.2 without alternator magnets or ring gear

Cooling Air cfm at 3600 rpm: 180 cfm


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6) CHARGING SYSTEMS

DC unregulated, dual circuit or 10 amp (optional)

7) EXHAUST SYSTEM

Muffler: Super lo-tone with stamped aluminized steel guard or wire form guard

Deflectors: 222573 (side out), 223372 (direct out), 222902 (louvered)Deflector can be installed in the 6, 7, 8 or 9 oclock positions (a 12 oclock

position is acceptable if guarded from rain).

Spark Arrester: 392154

Exhaust Air Flow Rate: 49.3 cfm

8) VIBRATION CHARACTERISTICS

Vibration should be checked on the cylinder head or the blower housing.Vibration levels tend to be highest in the perpendicular-to-crankshaft direction.

For isolation-mounted equipment, a focas mount system (isolator center linepointing towards the center-of-gravity of the engine) may be required.

9) FUEL SYSTEMS

Tank: 4-quart HDPE is standard and can be omitted. There is a stylized coveravailable for tankless engines under P/N 282023 and requires two P/N 95144

front-side fasteners and two P/N 94786 rear-side fasteners for mounting.

Fuel Shutoff: Standard

Fuel Filter: Standard in tank; an optional 150 micron in-line filter is available.

Maximum Fuel Head Pressure: 1.5 psi measured at the carburetor

Fuel Consumption:

Gallons per hour at a particular load level:

RPM 1/4 1/2 3/4 Full

2000 0.16 0.25 0.36 0.44

2400 0.21 0.31 0.44 0.582800 0.26 0.40 0.49 0.713200 0.29 0.45 0.56 0.81

3600 0.36 0.50 0.67 0.87

4000 0.40 0.53 0.72 0.92


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10) ENGINE MOUNTINGFasteners: 5/16-18 UNC or 5/16-24 UNF, Grade 5 or better

Support Bracket Mounting: Use stud-ended cover bolt P/N 95368 or flangemounting boss.

Flange Mounting (Bolt Circle Diameters):

5.000 inch (5/16-24 UNF bolts)6.500 inch (3/8-16 UNC bolts)

Flange Mounting (Pilot Diameters):

5.750 inch (standard)

11) ENCLOSING THE ENGINE

Intake Opening Required: 20 square inches

Discharge Opening Required: 20 square inches

Heat Test Guidelines: Standard

12) LUBRICATION SYSTEM

Capacity: 28 ounces

Low Oil Shutdown: A float type low oil shutdown is available.

13) SERVICE ACCESSORIES

Remote Air Cleaners: Not available. An ultra low mount (low profile) air cleaneris available.

Oil Drain Size: 1/4-18 NPTF

14) SOUND LEVELS

Energy Average dB(A) at 4 Meters

3600 rpm 3000 rpmMuffler Full Load No Load Full Load No Load

Lo-Tone Standard 84.5 79.5 82.5 76.5

Super Lo-Tone 81.5 77.5 79.5 74.5

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