Sears 917.25591 manual KEY Part NO, no, Description KEY Part

REPAIR PARTS

GT 18 TWIN GARDEN TRACTOR-MODEL NUMBER 917.255910

ENGINE_-MODELHUMBER 422437, TYPE NUMBER 0721-01

CYLINDER, CRANKSHAFT AND ENGINE BASE GROUP

KEY PART

NO, NO.

I394900

2 391086

3 212461

4 212462

5 270984

8 270983

7 393243

8 393153

9 27803

1093394

11 270882

tl 271145

11 271148

1293113

1393111

t4 91084

15394430

16 394535

17 291675

1893847

19394955

I9 394956

19394957

19394958

20 394959

20 394960

20394961

20 394962

21 394023

22260924

23299691

23391286

24394306

25223053

2692909

27390420

2865906

29 26828

30 221596

31 292260

32 93630

33 261368

34 212337

DESCRIPTION

KEY

PART

DESCRIPTION

NO

NO,

Cylinder Assembly

35

271316

Foam Seal. Governor Shaft

Seal- Oil

36

296004

Pipe. Fuel {Inc. Key No. 52)

Head-

Cylinder No. t

37

394348

Gear. Governor

Head-

Cylinder No. 2

38

89838

Wrench - Spark Plug

*Gasket

..Cylinder

Head No

1

39

220883

Washer ..Gov. Crank (inside)

*Gasket

- Cylinder

Head No, 2

40

394539

Plug.

Spark

(Resistor) (2 ,.3/8 high- 60

Breather Assembly NoD 1

mm)

Nut-

Hex 8-

32

Breather Auembly

No, 2

41

90576

Terminal

*Gasket

.. Valve Cover

42

231174

Screw., Scm

43

280180

Grommet _ insulator

°Gasket

,. CrankcaseCover t/64"

Thick

44

394014

Cap and Dipstick ,_Oil Filler

"Gasket _ Crankcar_ Cover °008"

Thick

45

68838

Sealo Filler Tube

Tube°

Oil Filler

°Gasket - CrankcaseCover ,089"

Thick

46

392782

Screw ,,Hex Hd_

Screw ,,Cylinder

Head (2.,

t5/16"

long)

47

93783

Trough - Dipper

Screw- Cylinder

Head (1

!5/16"

long)

48

223055

Rug,, Oil

Drain

49

394391

Base. Engine

"Gasket,

Engine Base

Crankshaft

50

270981

Cover Assembly- Crankcase

51

222700

Baffle.

Air

Clamp°

Fuel Pipe

Seal. Oi!

52

93053

Screw-

CrankcaseCover Mtg, Sam

53

93851

Retainer. E-Ring

Crank • Governor

Piston Assembly

• Standard

(Inc,

54

394396

Elbow-

Spark Plug

Key No_s, 20 & 22)

55

66538

Plug.

Hex Socket

Piston A_embly

...010"

O.So

56

93448

Key-

Flywheel

Piston Assembly - ,020"

O,,S,

57

222698

Piston Assembly - °030"

O,So

58

220863

Washer

Washer - Thrust

Ring Set-

Piston,

Standard

59

222773

Gear° Timin_

Ring Set., Piston-

,010"

O.S,

60

261363

Ring Set,

Piston-

,020"

O,S.

61

393606

Seat Assay,and Retainer

Bearing,, Ball (P.T.O. side)

Ring Set-

Piston-

°030" O,&

62

393741

63

231218

+Guide. Exhaust Valve

Dipstick

and Tube Assembly (inc.

54

210940

+Seat-

Exhaust Valve (Standard)

Key No's 44, 45 & 46)

65

261463

+Seat _.Intake VaNe (Standard)

Lock-

Piston

Pin

66

261559

Lower Bushing- Gov_

Pin Assembly

..Piston - Standard

67

391115

Wire ,,Ground

(Inc. Key NOD22)

68

230318

Connector _ Fuel Pipe

Pin Assembly. Piston .. ,005"O.S

69

92791

Washer. Lock Shakeproof

Rod Assembly - Connecting

70

93722

Terminai ,,Spade

Dipper-

Connecting Rod

71

261528

Valve,, Intake

Screw.

Connecting Rod

72

92268

Washer

+ Bearing - Cyiinder

Valve

Exhaust

73

261623

Spring,

Intake Valve

74

261560

Upper Bushing - Governor

Spring ,.Exhaust

Valve

*inc,, in Gasket

Set - 394501

Retainer • Intake Valve

Rotocoil ,,Exhaust

+Special Too{s

required to

install

Retainer ..Exhaust Valve Rotocoil

Tappet ,,Valve

Gear. Cam