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TRACTOR - - MODEL NUMBER 917.275761
BRIGGS & STRATTON ENGINE-MODEL NUMBER 31P777, TYPE NUMBER 0378-E1
KEY PART KEY PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION
1 697174 Cylinder Assembly 106 690577 OSeat-lnlet
2 399265 Kit-Bushing/Seal (Magneto Side) 108 690464 Valve-Choke (Manual Choke)
3 391086 ,Seal-Oil (Magneto Side) 108A 692344 Valve-Choke (Choke A Matic)
4 697188 Sump-Engine 117 694352 O Jet-Main (Standard)
5 698147 Head-Cylinder 118 697228 Jet-Main (High Altitude)
7 699168 ,+Gasket-Cylinder Head 121 697241 Kit-Carburetor Overhaul
9 697109 ,Gasket-Breather 125 697190 Carburetor
11 697113 Tube-Breather 127 695005 Plug-Welch
12 697110 ,Gasket-Crankcase 130 691750 Valve-Throttle
13 690360 Screw (Cylinder Head) 131 494379 Kit-Throttle Shaft
15 690946 Plug-Oil Drain 133 494381 Float-Carburetor
16 697127 Crankshaft 137 281165 O$ Gasket-Float Bowl
20 690947 ,Seal-Oil (PTO Side) 141 495097 Kit-Choke Shaft (Manual Choke)
22 692125 Screw (Crankcase Cover/Sump) 141A 495931 Kit-Choke Shaft (Choke A Matic)
23 693557 Flywheel 142 697140 ONozzle-Carburetor
24 222698 Key-Flywheel 146 691639 Key-Timing
25 699052 Piston Assembly (Standard) 186 698174 Connector-Hose
-- 699054 Piston Assembly (.020" Over- 187 699331 Line-Fuel
size) 188 691693 Screw (Control Bracket)
26 699051 Ring Set (Standard) 192 691986 Adjuster-Rocker Arm
-- 697559 Ring Set (.020" Oversize) 202 691841 Link-Mechanical Governor
27 698469 Lock-Piston Pin 209 692208 Spring-Governor
28 697099 Pin-Piston 216 691840 Link-Choke
29 697126 Rod-Connecting (Standard) 222 694042 Bracket-Control
-- 697263 Rod-Connecting (.020" Under- 227 691374 Lever-Governor Control
size) 232 691842 Spring-Governor
32 692852 Screw (Connecting Rod) 238 691843 Cap-Valve
33 695760 Valve-Exhaust 240 394358 Filter-Fuel
34 695761 Valve-Intake 265 691024 Clamp-Casing
35 691279 Spring-Valve (Intake) 267 695134 Screw (Casing Clamp)
36 691279 Spring-Valve (Exhaust) 276 692255 OSWasher-Sealing
37 697108 Guard-Flywheel 304 699829 Housing-Blower
42 690964 Retainer-Valve 305 697102 Screw (Blower Housing)
43 691968 Slinger-Governor/Oil 305A 697103 Screw (Blower Housing)
45 690564 Tappet-Valve 306 697107 Shield-Cylinder
46 790400 Camshaft 307 691003 Screw (Cylinder Shield)
48 697762 Short Block 309 693551 Motor-Starter
50 690193 Manifold-Intake 310 690323 Bolt (Starter Motor)
51 692137 ,O_+Gasket-lntake 311 497608 Brush Set
53 690227 Stud (Carburetor) 333 492341 Armature-Magneto
54 691148 Screw (Intake Manifold) 334 691061 Screw (Magneto Armature)
73 697133 Screen-Rotating
74 697897 Screw (Rotating Screen) Included in Engine Gasket Set, Key. No. 358
78 691003 Screw (Flywheel Guard) O Included in Carburetor Overhaul Kit, Key. No.
89 690283 Plug-Oil 121
93 690602 OBushing-Throttle Shaft :l: Included in Carburetor Gasket Set, Key. No. 977
94 498030 Kit-Idle Mixture + Included in Valve Gasket Set, Key. No. 1095
95 691636 Screw (Throttle Valve)
98 495800 Kit-Idle Speed NOTE: All component dimensions given in U.S. inches
104 690525 OPin-Float Hinge 1 inch = 25.4 mm
105 231855 OValve-Float Needle
52
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