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TRACTOR - - MODEL NUMBER 917.270750
BRIGGS ENGINE-MODEL NUMBER 407777, TYPE NUMBER 0121-E3
KEY PART KEY PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION
1 690231 Cylinder Assembly 121 499811 Carburetor Overhaul Kit
2 499585 Bushin_.-Cylinder 122 690952 Spacer-Carburetor
3 391086 * Seal-Oil 125 499804 Carburetor
4 690069 Sump-Engine 130 690993 Valve*Throttle
5 499587 Head-Cylinder No. 1 t31 499805 Throttle Shaft Kit
5A 499595 Head-Cylinder No, 2 133 499806 Float-Carburetor
7 690962 "/r_ Gasket-Cylinder Head 135 499803 Fuel Transfer Tube
8 499601 Breather Assembly 137 690994 O, Gasket-Float Bowl
9 690937 ,/r Gasket-Breather 141 499807 Choke Shaft Kit
t0 690960 Screw (BreatherAssy.) 142 499808 • Nozzle-Carburetor
11 690942 Tube-Breather 146 94388 Key-Timing
12 690945 _ Gasket-Crankcase 150 690995 O<_ Gasket-Nozzle
13 690360 Screw (Cylinder Head) 160 690996 Retainer-Solenoid
15 690946 Plug-Oil Drain 163 691001 _r_ Gasket-Air Cleaner
16 691046 Crankshaft 187 691050 Line-Fuel (Cut to Required
20 690947 _r SeaI-OU (PTO Side) Length)
22 690308 Screw (Engine Sump) 157A 691049 Line-Fuel
23 691053 Flywheel 188 690960 Screw (Control Bracket)
24 222698 Key-Flywheel 192 690083 Adjuster-Rocker Arm
25 499588 Piston Assembly (Std.) 197 690960 Screw (Back Plate)
499589 Piston Assembly (.010 O.S.) 209 691018 Spring-Governor
499590 Piston Assembly (.020 O.S.) 211 691019 Spring-Governed Idle
499591 Piston Assembly (.030 O.S.) 212 691020 Link-Throttle
26 499604 Ring Set-Piston (Std,) 213 691021 Bracket-Choke Control
499605 Ring Set-Piston (.010 O.S.) 216 691022 Link-Choke
499606 Ring Set-Piston (.020 O.S.) 219 394348 Gear-Governor
499607 RingSet-Piston (.030 O.S.) 220 690412 Washer (Governor Lever)
27 690975 Lock-Piston Pin 222 691023 Bracket-Control
28 499582 Pin-Piston 227 691048 Control Lever-Governor
29 499583 Rod-Connecting 231 690718 Screw (Choke Valve)
32 690976 Screw(Connecting Rod) 240 691035 Filter-Fuel
33 499596 Valve-Exhaust 250 690957 Retainer-Breather
34 499597 Valve-Intake 252 690956 Element-Breather
35 690963 Spring-Valve (Intake) 265 691024 Clamp-Casing
36 690963 Spring-Valve (Exhaust) 267 695134 Screw (Casing Clamp)
40 690964 Retainer-Valve 276 690997 *O_ Sealing Washer
42 499586 Keeper-Valve 278 690097 Washer (Gov. Control Lever)
45 690977 Valve Tappet 287 690960 Screw (Dipstick Tube)
46 690978 Cam Shaft 304 691004 Housing-Blower
48 693893 Short Block 305 691005 Screw_Blower Housing)
50 690948 Manifold-Intake 309 691262 Motor-Starter
51 90949 *O_ Gasket-Intake 310 691263 Bolt-Starter Motor
51A 690950 *O4, Gasket-Intake 311 497608 Brush Set
53 690951 Stud (Carburetor) 332 691059 Nut (Flywheel)
54 690953 Screw (Intake Manifold) 333 691060 Armature-Magneto
73 691055 Screen-Rotating 334 691061 Screw (Magneto Armature)
74 691057 Screw (Rotating Screen) 337 691043 Spark Plug
75 691056 Washer (Flywheel) 358 499889 Gasket Set
89 690283 Plug-Oil 363 691062 Flywheel Puller
95 690718 Screw (Throttle Valve)
98 499802 Idle Speed Kit * Included in Engine Gasket Set, Ref. No. 358
t04 690984 • Pin-Float Hinge • Included in Carburetor Overhaul Kit, Ref. No.
105 690985 • Valve-Float Needle 121
108 690986 Valve-Choke • Included in Carburetor Gasket Set, Ref. No.
117 690232 • Jet-Main (Standard) 977
690989 Jet-Main (High Altitude) • Included in Valve Overhaul Kit,Ref. No. 1033
NOTE: All component dimensions given in U.S.
inches1 inch = 25.4 mm
53