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BRIGGS & STRATTON 4=CYCLE ENGINE MODEL NUMBER 12S505=3856=B1
KEY PART KEY PART
NO. NO. DESCRiPTiON NO. NO. DESCRiPTiON
1 692670 Cylinder Assembly 118 498978
2 399269 Kit-Bushing/Seal 121 792383
3 299819s * Seal-Oil (Magneto Side) 122 792382
4 493279 Sump-Engine 125 790120
5 792381 Head-Cylinder 127 694468 O
7 697230 *+ Gasket-Cylinder Head 130 696564
8 495786 Breather Assembly 133 398187
9 699833 Gasket-Breather 134 398188 O
10 691125 Screw (Breather Assembly) 137 693981 O:!:
11 691260 Tube-Breather 163 691894.O$+
11A 692937 Tube-Breather 187 791766
12 692232 * Gasket-Crankcase
13 691137 Screw (Cylinder Head) 188 691147
15 691680 Plug-Oil Drain 190 690940
16 691456 Crankshaft 192 694543
20 399781s * Seal-Oil (PTO Side) 202 691303
22 691092 Screw (Engine Sump) 209 691851
23 697610 Flywheel 222 792404
24 222698s Key-Flywheel 227 691467
25 791968 Piston Assembly 238 691300
(Standard) 259 691189
791326 Piston Assembly 276 271716 O$
(.020" Oversize) 287 690940
26 791969 Ring Set-Piston (Standard) 300 697590
791324 Ring Set-Piston 304 499677
(.020" Oversize) 305 691108
27 691866 Lock-Piston Pin 306 691232
28 499423 Pin-Piston 307 690345
29 499424 Rod-Connecting 309 695550
32 691664 Screw (Connecting Rod) 310 692327
32A 695759 Screw (Connecting Rod) 332 690662
33 499642 Valve=Exhaust 333 802574
34 499641 Valve-Intake 334 691061
35 691304 Spring-Valve (Intake) 337 692051
36 691304 Spring-Valve (Exhaust) 356 692390
40 692194 Retainer-Valve 358 792384
43 691997 Slinger-Governor/Oil 363 19069
45 690977 Tappet-Valve 365 691129
46 694039 Camshaft 383 19374s
48 692748 Short Block 404 690272
51 692668* O$+Gasket-tntake 425 690244
51A 692555*05+ Gasket-Intake 443 690255
51B 697735. O$+Gasket-lntake
55 691421
58 697316
60 281434
65 690837
95 691636
97 790121
104 691242
117 498981
Housing-Rewind Starter
Rope-Starter
(Cut to Required Length)
Grip-Starter Rope
Screw (Rewind Starter)
Screw (Throttle Valve)
Shaft-Throttle
O Pin-Float Hinge
Jet-Main (Standard)
445 697029
455 791960
456 692299
459 281505s
505 691251
510 494147
513 692358
523 499621
51
Jet-Main (High Altitude)
Kit-Carburetor Overhaul
Spacer-Carburetor
Carburetor
Plug-Welch
Valve-Throttle
Float-Carburetor
Valve-Needle/Seat
Gasket-Float Bowl
Gasket-Air Cleaner
Line-Fuel
(Cut to Required Length)
Screw (Control Bracket)
Screw (Fuel Tank)
Bali-Rocker Arm
Link-Mechanical Governor
Spring-Governor
Bracket-Control
Control Lever-Governor
Cap-Valve
Bracket-Casing Clamp
Sealing Washer
Screw (Dipstick Tube)
Muffler
Housing-Blower
Screw (Blower Housing)
Shield-Cylinder
Screw (Cylinder Shield)
Motor-Starter
Screw (Starter Motor)
Nut (Flywheel)
Armature-Magneto
Screw (Armature Magneto)
Plug-Spark
Wire-Stop
Gasket Set-Engine
Puller-Flywheel
Screw (Carburetor)
Wrench-Spark Plug
Washer (Governor Crank)
Screw (Air Cleaner Cover)
Screw
(Air Cleaner Primer Base)
Filter-Air Cleaner Cartridge
Cup-Flywheel
Plate-Pawl Friction
PawI-Ratchet
Nut
(Governor Control Lever)
Drive-Starter
Clutch-Drive
Dipstick