TRACTOR - - MODEL NUMBER 917.274810

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

O

Seat-Inlet

 

 

 

 

2

399265

 

Kit-Bushing/Seal

 

 

(Magneto

108

690464

 

Valve-Choke

(Manual

Choke)

 

 

 

 

Side)

 

 

 

108A

692344

 

Valve-Choke

(Choke A Matic)

3

391086

Seal-Oil (Magneto Side)

117

694352

O

Jet-Main

(Standard)

 

4

697188

 

Sump-Engine

 

 

 

118

697228

 

Jet-Main

(High

Altitude)

5

698147

 

Head-Cylinder

 

 

 

121

697241

 

Kit-Carburetor

Overhaul

7

699168

°+

Gasket-Cylinder

 

 

Head

125

697190

 

Carburetor

 

 

 

 

9

697109

°

Gasket-Breather

 

 

 

127

695005

 

Plug-Welch

 

 

 

 

11

697113

 

Tube-Breather

 

 

 

130

691750

 

Valve-Throttle

 

 

 

12

697110

°

Gasket-Crankcase

 

131

494379

 

Kit-Throttle

Shaft

 

 

13

690360

 

Screw

 

(Cylinder

 

Head)

133

494381

 

Float-Carburetor

 

 

 

15

690946

 

Plug-Oil

Drain

 

 

 

137

281165

O$

Gasket-Float

Bowl

 

16

697127

 

Crankshaft

 

 

 

 

141

495097

 

Kit-Choke

Shaft

 

 

 

20

690947

°

Seal-Oil

(PTO

 

Side)

 

 

 

(Manual

Choke)

 

 

 

22

692125

 

Screw

 

(Crankcase

Cover/Sump)

141A

495931

 

Kit-Choke

Shaft

 

 

 

23

693557

 

Flywheel

 

 

 

 

 

 

 

(Choke

A Matic)

 

 

 

24

222698

 

Key-Flywheel

 

 

 

142

697140

O

Nozzle-Carburetor

 

 

 

25

699052

 

Piston

 

Assembly

(Standard)

146

691639

 

Key-Timing

 

 

 

 

--

699054

 

Piston

 

Assembly

 

186

698174

 

Connector-Hose

 

 

 

 

 

 

(.020"

Oversize)

 

 

187

699331

 

Line-Fuel

 

 

 

 

26

699051

 

Ring

Set

(Standard)

188

691693

 

Screw

(Control

Bracket)

--

697559

 

Ring

Set

(.020"

Oversize)

192

691986

 

Adjuster-Rocker

Arm

 

27

698469

 

Lock-Piston

Pin

 

202

691841

 

Link-Mechanical

 

Governor

28

697099

 

Pin-Piston

 

 

 

 

209

692208

 

Spring-Governor

 

 

 

29

697126

 

Rod-Connecting

 

 

(Standard)

216

691840

 

Link-Choke

 

 

 

 

--

697263

 

Rod-Connecting

 

 

 

222

694042

 

Bracket-Control

 

 

 

 

 

 

(.020"

 

Undersize)

 

227

691374

 

Lever-Governor

Control

32

692852

 

Screw

 

(Connecting

Rod)

232

691842

 

Spring-Governor

 

 

 

33

695760

 

Valve-Exhaust

 

 

 

238

691843

 

Cap-Valve

 

 

 

 

34

695761

 

Valve-Intake

 

 

 

240

394358

 

Filter-Fuel

 

 

 

 

35

691279

 

Spring-Valve

(Intake)

265

691024

 

Clamp-Casing

 

 

 

36

691279

 

Spring-Valve

(Exhaust)

267

695134

 

Screw

(Casing

Clamp)

 

37

697108

 

Guard-Flywheel

 

 

 

276

692255

O$

Washer-Sealing

 

 

 

42

690964

 

Retainer-Valve

 

 

 

304

699829

 

Housing-Blower

 

 

 

43

691968

 

Slinger-Governor/Oil

 

305

697102

 

Screw

(Blower

Housing)

45

690564

 

Tappet-Valve

 

 

 

305A

697103

 

Screw

(Blower

Housing)

46

790400

 

Camshaft

 

 

 

 

306

697107

 

Shield-Cylinder

 

 

 

48

697762

 

Short

Block

 

 

 

307

691003

 

Screw

(Cylinder

Shield)

50

690193

 

Manifold-Intake

 

 

 

309

693551

 

Motor-Starter

 

 

 

51

692137

,O_+

Gasket-Intake

 

 

 

310

690323

 

Bolt

(Starter

Motor)

 

53

690227

 

Stud

(Carburetor)

 

311

497608

 

Brush Set

 

 

 

 

54

691148

 

Screw

 

(intake

 

Manifold)

333

492341

 

Armature-Magneto

 

 

 

73

697133

 

Screen-Rotating

 

 

 

334

691061

 

Screw

(Magneto

 

Armature)

74

697897

 

Screw

 

(Rotating

 

Screen)

 

 

 

 

 

 

 

 

 

 

78

691003

 

Screw

 

(Flywheel

 

Guard)

 

included

in Engine

Gasket Set,

Key. No. 358

89

690283

 

Plug-Oil

 

 

 

 

 

O

included

in Carburetor

Overhaul

Kit,

Key. No.

93

690602

O

Bushing-Throttle

 

 

Shaft

 

121

 

 

 

 

 

 

 

 

94

498030

 

Kit-Idle

Mixture

 

 

 

$

included

in Carburetor

Gasket

Set,

Key. No.

95

691636

 

Screw

 

(Throttle

 

Valve)

 

977

 

 

 

 

 

 

 

 

98

495800

 

Kit-Idle

Speed

 

 

 

+

included

in Valve

Gasket

Set,

Key. No. 1095

104

690525

O

Pin-Float

Hinge

 

 

 

 

 

 

 

 

 

 

 

 

105

231855

O

Valve-Float

Needle

NOTE:

All component

dimensions

given

in U.S. inches

 

 

 

 

 

 

 

 

 

 

 

1 inch

= 25.4

mm

 

 

 

 

 

 

50

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