272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

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Section 4 Fuel Systems and Carburetion Page CARBURETION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Carburetor Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Carburetor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Carburetor Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Aisan Carburetor – Models 290700, 303700, 350700 (after 950930xx) . . . . . . . . . . . . . . . . . . . . . 81 Aisan Carburetor – Model 610000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Mikuni Carburetor – Models 290700, 303700, 350700 (before 951001xx) . . . . . . . . . . . . . . . . . . 85 Mikuni Carburetor – Models 290400, 303400, 350400 (before 950801xx) . . . . . . . . . . . . . . . . . . 99 Nikki Carburetor – Models 290400, 303400, 350400 (after 950731xx) . . . . . . . . . . . . . . . . . . . . . 94 Nikki Carburetor – Models 351700, 351400, 380700, 380400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Nikki Carburetor – Model 540000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 FUEL SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 7-Quart Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 9-Quart Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Fuel Shut-Off Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 75
FUEL SYSTEMS 7 Quart Fuel Tank Removal 1. Remove air cleaner knob (1) and cover (2), Fig. 1. 2. Remove air cleaner nut (3), top plate (4) and element (5). Fig. 2 8. If necessary remove 4 screws and 2 PTO side fuel tank base supports (7), Fig. 3. NOTE: Do not disturb the governor controls. Fig. 3 Fig. 1 9. If necessary remove 4 screws and 2 flywheel side fuel tank base supports (8), Fig. 4. 3. Turn the fuel shut-off to the OFF position. Disconnect fuel valve shut-off link. 4. Remove 2 screws (flywheel side) and 2 shoulder bolts (PTO side) from the fuel tank. 5. Lift the fuel tank. Disconnect the fuel line from the carburetor. Remove the fuel tank. 6. Remove air cleaner base. Disconnect the breather tube. 7. Remove 4 screws (6) and the fuel tank base plate, Fig. 2. Fig. 4 Installation 1. Install 2 flywheel side fuel tank base supports (8), Fig. 4. Torque screws to 140 in. lbs. (16 Nm). 2. Install 2 PTO side fuel tank base supports (7), Fig. 3. Torque screws to 140 in. lbs. (16 Nm). 76
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www.mymowerparts.com For Briggs & S
Page 3 and 4:
IN THE INTEREST OF SAFETY DANGER FO
Page 5 and 6:
WARNING Engines give off carbon mon
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BRIGGS & STRATTON MODEL NUMBERING S
Page 9 and 10:
Oil Recommendations Oil has four pu
Page 11 and 12:
CAUTION: DO NOT use petroleum solve
Page 13 and 14:
ÌÌ ÌÌ Fig. 8 ÌÌ Fig.
Page 15 and 16:
NOTE: Idle speed may vary according
Page 17 and 18:
Remove deposits from combustion cha
Page 19 and 20:
The crankcase capacity of Vanguard
Page 21 and 22:
5. Turn fixed speed adjustable cont
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Fig. 43 Fig. 45 Oil Cooler 7. With
Page 25 and 26: TUNE-UP PROCEDURE A “Tune-Up,”
Page 28 and 29: Section 2 Troubleshooting Page ELEC
Page 30 and 31: Fouled Plug or Dead Cylinder To tes
Page 32 and 33: Fig. 6 4. Ground the other spar
Page 34 and 35: Charging System Identification Tabl
Page 36 and 37: Testing Alternator Output When test
Page 38 and 39: A Fig. 14 Fig. 15 NOTE: Serv
Page 40 and 41: The battery is not used for the lig
Page 42 and 43: Output Test WHEN CHECKING ALTERNATO
Page 44 and 45: 7. If NO or LOW output is found, be
Page 46 and 47: POWERLINK SYSTEM Some V-Twin engine
Page 48 and 49: If the previous tests have not reve
Page 50 and 51: Installation 1. Before installing b
Page 52 and 53: 3. Attach BLACK test lead to a good
Page 54 and 55: Oil Pressure Test Switch Use Digit
Page 56 and 57: Wiring Diagram For Starter Panel &
Page 58 and 59: 6. Insert BLACK test lead into COM
Page 60 and 61: Governor Test Dynamic Check Perform
Page 62 and 63: GASEOUS FUELED ENGINES TROUBLESHOOT
Page 64 and 65: GASEOUS FUEL CARBURETOR ADJUSTMENT
Page 66 and 67: Section 3 Engine Disassembly Page A
Page 68 and 69: 21 14 18 20 14 15 16 17 18 19 20 21
Page 70 and 71: Î Î Fig. 4 Horizontal Cranksh
Page 72 and 73: Remove Flywheel Fig. 13 Flywheel Nu
Page 74 and 75: Remove Breather and Starter Motor 1
Page 78 and 79: NOTE: Install the supports over the
Page 80 and 81: Fuel Filter Replace the inline fuel
Page 82 and 83: NOTE: The inspection in Step 2 is p
Page 84 and 85: Fig. 30 Fig. 32 ÎÎÎÎ ÔÔÔ Ô
Page 86 and 87: 21. Position bowl drain as shown. 2
Page 88 and 89: NOTE: The top and bottom edges of t
Page 90 and 91: NOTE: Use LOCTITE® 222 on screw th
Page 92 and 93: Fixed Main Jet Sizes Model 351700 L
Page 94 and 95: Inspect Carburetor Inspect all part
Page 96 and 97: 3. Remove float and inlet needle.
Page 98 and 99: Inspect Carburetor Inspect all part
Page 100 and 101: Check Throttle, Choke Shaft and Bod
Page 102 and 103: ÒÒ ÒÒ ÒÒ Fig. 103
Page 104 and 105: CAUTION: DO NOT press on float to a
Page 106 and 107: Remove Carburetor from Manifold Rem
Page 108 and 109: NOTE: Parts containing rubber, such
Page 110 and 111: Aisan Carburetor Model 610000 Gener
Page 112 and 113: NOTE: Use LOCTITE 222 on screw thr
Page 114 and 115: Section 5 Governor Page GENERAL INF
Page 116 and 117: 3. Loosen governor lever nut (3). 4
Page 118 and 119: 2. If necessary, remove the governo
Page 120 and 121: Section 6 Cylinder Heads and Valves
Page 122 and 123: 5. Remove intake and exhaust valves
Page 124 and 125: 1. Measure valve stem diameter appr
Page 126 and 127:
Section 7 Starters Page GENERAL INF
Page 128 and 129:
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
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REWIND STARTER IDENTIFICATION Two r
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ÓÓÓ ÓÓÓ 5. Carefully lift
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ÓÓ ÓÓ ÓÓÓÓÓÓÓÓ ÓÓÓÓ
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Section 8 Lubrication Systems Page
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CRANKCASE BREATHER SERVICE Models 2
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Models 540000, 610000 1. Remove two
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Section 9 Cylinders and Crankcase C
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NOTE: Recondition the cylinder bore
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Insert Bushing Driver #19349 into b
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Section 10 Crankshafts and Camshaft
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INSPECT CAMSHAFT Inspect gear teeth
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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
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Fig. 13 2. Install valve covers wit
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Install Armatures 1. Assemble armat
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ÑÑ ÑÑ Fig. 29 a. Be sure lo
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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 182 and 183:
Page 184 and 185:
Page 186 and 187:
Torque Values Description Air Clean
Page 188 and 189:
Starter Motor Support Block A start
Page 190 and 191:
Drill Size - Decimal Equivalent (In
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