272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

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Inspect Carburetor Inspect all parts for wear, cracks, nicks and burrs. Inspect float for leaks. Replace damaged parts. Assemble Carburetor When assembling carburetor, use new seals and gaskets. 1. Install new throttle shaft seal (3) with sealing lip out, Fig. 68. 2. Install throttle shaft (2) with spacer (1). 6. Assemble inlet needle (11) to float (10). Install float assembly to carburetor body, Fig. 70. Install float hinge pin (12) from throttle lever (13) side. NOTE: Be sure float hinge pin is flush with float support or hinge pin will interfere with lower body. NOTE: Install one throttle plate (4) at a time. Check throttle shaft for freedom of operation after installing each throttle plate. NOTE: Use LOCTITE® 222 on screw threads (5). Fig. 70 Fig. 68 3. Install new choke shaft seal (9), Fig. 69 with sealing lip out. 4. Install choke shaft (8). 5. Install choke plate (7). 7. Install new welch plugs (16) with 5/16” (8 mm) punch, Fig. 71. 8. Use a sealant such as Permatex® #2 or nail polish on outside diameter of plug to prevent air leaks. 9. Install idle mixture screws (14) and springs (15). NOTE: DO NOT tighten screws. DO NOT install limiter caps at this time. NOTE: Check shaft for freedom of operation after installing plate. NOTE: Use LOCTITE® 222 on screw threads (6). Fig. 71 Fig. 69 10. Install pilot jets (17), Fig. 72. 11. Install fuel bowl drain screw (19) and spring (18). 93
Fig. 72 12. Install fixed main jets (20), Fig. 73, plugs and washers. Model 351700 Left (#1) cylinder is equipped with #98 main jet. Right (#2) cylinder is equipped with #100 main jet. Fig. 74 14. Assemble lower body with main jet plugs (23) facing throttle shaft side (24) of carburetor. Make sure gasket remains in position, Fig. 75. Tighten screws (22) securely. 15. Install anti-afterfire solenoid with washer. Torque to 90 in. lbs. (10 Nm). Model 351400 Left (#1) cylinder is equipped with #94 main jet. Right (#2) cylinder is equipped with #98 main jet. Model 380700 Left (#1) cylinder is equipped with #118 main jet. Right (#2) cylinder is equipped with #116 main jet. Model 380400 Left (#1) cylinder is equipped with #112 main jet. Right (#2) cylinder is equipped with #114 main jet. Fig. 75 Nikki Carburetor Models 290400, 303400, 350400 (After 950731xx) Check Throttle, Choke Shaft and Body For Wear NOTE: The measurement in Step 1 is taken with the carburetor off of the intake manifold. Fig. 73 13. Install lower body gasket (21), Fig. 74. Make sure gasket does not twist or kink. 1. Lay carburetor on 1/4” (6.35 mm) raised flat surface (1). Use a feeler gauge (2) to check throttle and choke shaft clearance as shown in Fig. 76. Throttle shaft and choke shaft clearance must not exceed 0.010” (0.25 mm). 94
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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
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 76 and 77: Section 4 Fuel Systems and Carburet
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 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
Page 130 and 131: 4. Remove end cap and brush retaine
Page 132 and 133: Brush retainers can be made from Pa
Page 134 and 135: Pinion Gear Pinion gear replacement
Page 136 and 137: 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
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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
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Models 540000, 610000 • Top Compr
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Section 12 Engine Assembly Page ENG
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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
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Final Engine Assembly • Install m
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Section 13 Engine Specifications Pa
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Torque Values Description Torque Ai
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Torque Values Description Air Clean
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Starter Motor Support Block A start
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Drill Size - Decimal Equivalent (In
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272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

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