272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

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Starter Motor Support Block A starter motor support block can be made from stock 1” (25.4 mm) thick as shown in Fig. 1. The dimensions for the block are: 1. 1” (25.4 mm) 2. 0.4” (10.2 mm) 3. 2” (51 mm) 4. 1” (25 mm) 5. 5” (127 mm) Fig. 1 Starter Motor Test Bracket d. 2” (50.8 mm) e. 10” (254 mm) f. 1” (25.4 mm) g. 3-1/2” (88.9 mm) 1. Drill two holes (1) 3/8” (9.5 mm) diameter for mounting starter. 2. Use a #7 drill to drill two holes (2) to mount Tachometer #19200. Tap holes for 1/4-20 screws. 3. Drill an extra hole (3) for mounting starter brackets. • CAUTION: DO NOT clamp motor housing in a vise or strike with a hammer. Starter motors contain ceramic magnets that could be broken or cracked if the housing is damaged. A growler or armature tester is available from an automotive parts supplier. A G B C A starter motor test bracket may be made from metal stock 1/4” (6.4 mm) thick steel as shown in Fig. 2. The dimensions for the test bracket are: a. 4” (101.6 mm) b. 2-1/4” (57.2 mm) c. 3-1/2” (88.9 mm) F Fig. 2 E D 187
Model FUEL SYSTEM IDENTIFICATION Fuel System Type Color Code 290400 Gravity Yellow 290400 Pump White 294400 Gravity Pump 294400 Pump None 303400 Gravity Blue 303400 Pump None 350400 Gravity Blue 350400 Pump None Model 351400 351700 380400 380700 CARBURETOR MAIN JETS Jet Number 405770 #132 445770 #140 540000 610000 Left cylinder (#1) #94 Right cylinder (#2) #98 Left cylinder (#1) #98 Right cylinder (#2) #100 Left cylinder (#1) #110 Right cylinder (#2) #114 Left cylinder (#1) #118 Right cylinder (#2) #116 Left Cylinder #136 Right Cylinder #138 Secondary Upper #120 (2 used) Secondary Lower #150 (2 used) REFERENCE PRESSURES FOR GASEOUS FUELED ENGINES Tank Pressure Secondary inlet under load Secondary outlet under load 90 psi minimum 11 inches of water 0 to slight vacuum 1 psi = 16 ounces = 27.72 inches of water DIODE FAILURE DIAGNOSIS Switch ON Switch OFF Cause Engine Runs on Only 1 Cylinder Engine Runs on Both Cylinders Won’t Run (No Spark) Engine Runs on Both Cylinders Shuts Off OK Only 1 Cylinder Shuts Off Engine Won’t Shut Off 1 Closed Diode 1 Open Diode 2 Closed Diodes 2 Open Diodes CRANKSHAFT GRINDING DIMENSIONS NOTE: Dimensions in Inches (Millimeters), Fig. 3 Model Crankpin Diameter (Dim. A) Throw (Dim. T) Fillet Radius (Dim. R) 29/30 1.30 1.4567 – (33.02) 1.4568 350/351 (37.00 1.375 38 37.03) (34.93) 0.170 0 – 0.180 54 1.654 1.535 (4.32 – 4.57) (42.01) (39.00) 61 1.654 (42.01) T R A Fig. 3 188
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www.mymowerparts.com For Briggs & S
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IN THE INTEREST OF SAFETY DANGER FO
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WARNING Engines give off carbon mon
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BRIGGS & STRATTON MODEL NUMBERING S
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Oil Recommendations Oil has four pu
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CAUTION: DO NOT use petroleum solve
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ÌÌ ÌÌ Fig. 8 ÌÌ Fig.
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NOTE: Idle speed may vary according
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Remove deposits from combustion cha
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The crankcase capacity of Vanguard
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5. Turn fixed speed adjustable cont
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Fig. 43 Fig. 45 Oil Cooler 7. With
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TUNE-UP PROCEDURE A “Tune-Up,”
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Section 2 Troubleshooting Page ELEC
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Fouled Plug or Dead Cylinder To tes
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Fig. 6 4. Ground the other spar
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Charging System Identification Tabl
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Testing Alternator Output When test
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A Fig. 14 Fig. 15 NOTE: Serv
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The battery is not used for the lig
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Output Test WHEN CHECKING ALTERNATO
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7. If NO or LOW output is found, be
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POWERLINK SYSTEM Some V-Twin engine
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If the previous tests have not reve
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Installation 1. Before installing b
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3. Attach BLACK test lead to a good
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Oil Pressure Test Switch Use Digit
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Wiring Diagram For Starter Panel &
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6. Insert BLACK test lead into COM
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Governor Test Dynamic Check Perform
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GASEOUS FUELED ENGINES TROUBLESHOOT
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GASEOUS FUEL CARBURETOR ADJUSTMENT
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Section 3 Engine Disassembly Page A
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21 14 18 20 14 15 16 17 18 19 20 21
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Î Î Fig. 4 Horizontal Cranksh
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Remove Flywheel Fig. 13 Flywheel Nu
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Remove Breather and Starter Motor 1
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Section 4 Fuel Systems and Carburet
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NOTE: Install the supports over the
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Fuel Filter Replace the inline fuel
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NOTE: The inspection in Step 2 is p
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Fig. 30 Fig. 32 ÎÎÎÎ ÔÔÔ Ô
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21. Position bowl drain as shown. 2
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NOTE: The top and bottom edges of t
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NOTE: Use LOCTITE® 222 on screw th
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Fixed Main Jet Sizes Model 351700 L
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Inspect Carburetor Inspect all part
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3. Remove float and inlet needle.
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Inspect Carburetor Inspect all part
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Check Throttle, Choke Shaft and Bod
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ÒÒ ÒÒ ÒÒ Fig. 103
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CAUTION: DO NOT press on float to a
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Remove Carburetor from Manifold Rem
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NOTE: Parts containing rubber, such
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Aisan Carburetor Model 610000 Gener
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NOTE: Use LOCTITE 222 on screw thr
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Section 5 Governor Page GENERAL INF
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3. Loosen governor lever nut (3). 4
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2. If necessary, remove the governo
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Section 6 Cylinder Heads and Valves
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5. Remove intake and exhaust valves
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1. Measure valve stem diameter appr
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Section 7 Starters Page GENERAL INF
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C-Ring Style Disassemble CAUTION
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4. Remove end cap and brush retaine
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Brush retainers can be made from Pa
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Pinion Gear Pinion gear replacement
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Fig. 40 Assemble Pinion Gear 1. Lub
Page 138 and 139: REWIND STARTER IDENTIFICATION Two r
Page 140 and 141: ÓÓÓ ÓÓÓ 5. Carefully lift
Page 142 and 143: ÓÓ ÓÓ ÓÓÓÓÓÓÓÓ ÓÓÓÓ
Page 144 and 145: Section 8 Lubrication Systems Page
Page 146 and 147: CRANKCASE BREATHER SERVICE Models 2
Page 148 and 149: Models 540000, 610000 1. Remove two
Page 150 and 151: Section 9 Cylinders and Crankcase C
Page 152 and 153: NOTE: Recondition the cylinder bore
Page 154 and 155: Insert Bushing Driver #19349 into b
Page 156 and 157: Section 10 Crankshafts and Camshaft
Page 158 and 159: INSPECT CAMSHAFT Inspect gear teeth
Page 160 and 161: Section 11 Pistons, Rings and Conne
Page 162 and 163: Models 540000, 610000 • Top Compr
Page 164 and 165: Section 12 Engine Assembly Page ENG
Page 166 and 167: 3. Align timing marks on camshaft a
Page 168 and 169: Fig. 13 2. Install valve covers wit
Page 170 and 171: Install Armatures 1. Assemble armat
Page 172 and 173: ÑÑ ÑÑ Fig. 29 a. Be sure lo
Page 174 and 175: 4. Install breather deflector (4) a
Page 176 and 177: Final Engine Assembly • Install m
Page 178 and 179: Section 13 Engine Specifications Pa
Page 180 and 181: Torque Values Description Torque Ai
Page 186 and 187: Torque Values Description Air Clean
Page 190 and 191: Drill Size - Decimal Equivalent (In
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272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

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