272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

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3. Loosen governor lever nut (3). 4. Remove governor lever (2) from shaft. Fig. 5 5. Remove rust, nicks or burrs from crankshaft. 6. Remove oil fill tube and dipstick assembly. 7. Remove crankcase cover, Fig. 6. 8. Discard gasket and O-ring. Ó Ó Fig. 7 Remove Governor Shaft 1. Remove cotter pin (3) and collar (2). Discard cotter pin, Fig. 8. 2. Slide governor shaft (1) out of bushings (5). 3. Remove and discard seal (4). 4. Check governor shaft and bushings for wear or damage. Replace as required. ÖÖ ÔÔÖÔÔ ÔÔ ÔÔ ÔÔ ÖÖÖ ÔÔ Inspect Governor Fig. 6 1. Governor spool (3) must move freely on PTO journal of camshaft, Fig. 7. Replace if spool sticks or bearing is damaged. 2. Flyweights (2) must move freely on hinge pins (1). Replace camshaft if hinge pins are loose or governor spool does not move freely on journal. Fig. 8 Replace Governor Shaft Bushings 1. Press out upper bushing (2) using Bushing Driver #19204 (1), Fig. 9. 2. Lubricate new bushing with engine oil. Press in place with Bushing Driver #19204. NOTE: Lower bushing is a slip fit. If bearing for lower bushing (3) is worn, the crankcase cover must be replaced. 115
ÔÔ ÔÔÔ Ö ÖÖ ÖÔÔ ÖÖ ÔÔÔ ÔÔ ÖÖ ÖÖ Install Governor Shaft Fig. 9 1. Assemble lower bushing to governor shaft with thrust flange (4) down, Fig. 10. 2. Slide shaft up through lower bearing and upper bushing. 3. Install new seal (3), collar (1) and cotter pin (2). Governor shaft must rotate freely. 4. Rotate governor shaft (arrow) so that paddle rests against camshaft bearing support (5). Fig. 11 2. Insert proper seal protector through oil seal. 3. Install crankcase cover or sump with new gasket. Torque screws in sequence shown to 150 in. lbs. (17 Nm), Fig. 12. 4. Reinstall oil fill tube and dipstick assembly. 8 3 1 5 ÔÔ ÔÔ ÖÖÖ ÔÔ ÔÔÖ ÖÖ ÔÔ ÔÔ 6 7 9 4 2 Fig. 12 5. Reassemble governor lever (6) to shaft, Fig. 13. a. Reassemble governor link and spring (5) at carburetor. b. Reassemble governed idle spring (4). Fig. 10 NOTE: DO NOT tighten nut (7) at this time. Assembly 1. Assemble governor spool to camshaft, Fig. 11. a. Make sure that spool (2) engages flyweights and slot on spool fits over locating pin (1). b. Install new O-ring (3) in cylinder. 6. Install push rods in their original position. 7. Compress valve spring with rocker arm. Insert push rod into rocker arm socket. Be sure push rods remain seated in recess in tappets. 8. Install valve covers with new gaskets and valve cover seals. Torque nuts to 25 in. lbs. (3 Nm). 116
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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
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 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 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
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
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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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