Cub Cadet St 100 Owners User Manual

Illustrated Parts Manual  
Spring / Summer Chore Performers  
CUB CADET LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019  
Printed In USA  
Form No. 769-10195  
(September 11, 2014)  
Page Left Blank Intentionally  
3
Model Series 260  
45  
35  
44  
47  
37  
39  
42  
43  
38  
11  
12  
46  
40  
46  
9
17  
8
13  
41  
16  
23  
29  
40  
33  
6
19  
3
5
48  
19  
16  
49  
7
17  
41  
2
9
30  
31  
32  
12  
36  
14  
34  
4
50  
15  
11  
20  
24  
22  
25  
15  
11  
26  
10  
18  
10  
28  
10  
1
27  
21  
10  
4
 
Model Series 260  
Ref. Part Number  
Description  
Ref. Part Number  
Description  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
756-05108  
781-1020  
Pulley, Idler, Trimmer  
1
2
618-07086  
631-0096  
Spindle Assembly  
Keeper Bracket, Front  
Keeper Bracket, Idler  
Hinge Clip, Trailshield  
Screw, HL, #12-16, .625, Panphi  
Washer, Flat, .194 x .62 x .063  
Pulley/Flywheel  
Deflector Assembly, Trimmer  
(incl. Deflector Flap and Hardware)  
Axle Assembly, Trimmer  
781-1028  
782-9065  
710-1823  
3
681-0159  
710-0805A  
710-0395  
710-0237  
710-0703  
710-1652  
710-3015  
712-04063  
712-04064  
734-04030  
731-2329  
732-1022  
736-0173  
736-0182  
736-0270  
736-0371  
936-0425  
731-2315  
4
Hex Cap Screw, 5/16-18 x 1.50  
Hex Cap Screw, 5/16-18 x 2.25  
Hex Screw, 5/16-24, .625, Gr5, Std  
Screw, Carriage, 1/4-20, .75, Gr5  
Screw, Self-tapping, 1/4-20 x .625  
Hex Screw, 1/4-20, .75, Gr5, Std  
Nut, Flange Lock, 5/16-18, GrF  
Nut, Flange Lock, 1/4-20, GrF  
Wheel, 14 x 1.75, Gray  
936-0400  
656-05003  
710-0654A  
710-06074  
731-09688  
936-0452  
720-0279  
710-04998  
710-1205  
5
6
Sems Screw, 3/8-16, 1.0,  
Hex Screw, 3/8-24, 1.25, Gr8  
Cover, Shroud  
7
8
9
Washer, Belle, .396 x 1.14 x .095  
Knob, Handle  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
Screw, Carriage, 5/16-18, 1.00, Gr5  
Eye Bolt, 1/4-20  
Trailshield, 5.85 x 14.50  
710-3005  
712-04065  
720-04122  
738-04419A  
946-05141  
747-06246  
749-05102  
749-05103  
710-3008  
781-05007A  
981-1008A  
723-0400  
Hex Screw, 3/8-16, 1.25, Gr5, Std  
Nut,, Flange Lock, 3/8-16, GRF  
Knob, Wing, 5/16-18, Black  
Shoulder Screw, .375 x .148 x1/4-20  
Control Cable, 48”  
Spring, Extension, .50 OD x 3.375  
Washer, Flat, .280 x .740 x .063  
Washer, Spring, .500 x 1.00 x .022  
Washer, Belle, .265 x .750 x .060  
Washer, Flat, .343 x .880 x .062  
Washer, Belle, .325 x .930 x .045  
Flap, Deflector, String Trimmer  
Line, Trimmer, .155, 10-pack  
P/M Spacer  
Bail, Black  
Handle, Lower  
Handle, Upper  
490-040-M035  
948-0278  
750-1240  
750-1275  
954-05077  
Hex Cap Screw, 5/16-18 x .75  
Trimmer Base  
Spacer, .51 ID x 1.00 OD x .38  
Spacer, Idler, Trimmer  
Idler Trimmer Bracket  
Safety Glasses  
V-Belt  
5
Model Series 550  
48  
45  
17  
60  
61  
30  
9
22  
69  
14  
70  
36  
23  
46  
13  
49  
43  
34  
50  
16  
18  
40  
24  
65  
1
38  
12  
18  
A
33  
27  
9
16  
37  
52  
10  
53  
56  
36  
64  
35  
2
35  
15  
34  
36  
31  
41  
25  
8
68  
36  
33  
58  
67  
66  
40  
4
5
62  
29  
19  
6
47  
20  
28  
39  
63  
32  
A
42  
54  
21  
26  
3
44  
Trencher Kit  
62  
51  
55  
57  
59  
39  
7
11  
6
 
Model Series 550  
Ref.  
1
Part No.  
687-02022  
Description  
Curb Height Adjustment Lever  
Curb Height Adjuster Plate  
Blade Plate Assembly  
Screw 38-24  
Ref.  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
69  
70  
Part No.  
936-0232  
Description  
Wave Washer .531 x .781 x .013  
Flat Washer, .385 x 1.5 x .075  
Flat Washer .385 x 1.0 x .135 †  
Flat Washer .635x1.24x.181  
Bell Washer,.396 x 1.140  
Shoulder Screw, 38-16  
Shoulder Screw  
2
687-02585  
687-02126  
710-0191  
736-0234  
736-0258  
936-04088  
936-0452  
738-04149  
738-0706C  
738-0929  
941-0524A  
946-05156  
946-04036  
747- 04110A  
747-0976A  
749-04183A  
749-04234  
950-04105  
750-04129  
950-04142  
750-0547  
3
4
5
710 - 0411  
Screw 38-16  
6
710-04389  
710-0599  
710-0654A  
710-0726  
710-0870  
710 -1143A  
710 -1174  
Hex Screw, 516-18  
Self-tapping Screw, 14-20  
Screw, 38-16  
7
8
Shoulder Screw, 38-16  
Bearing, .625 ID x 1.57 OD  
Control Cable  
9
Hex Screw, 516-12  
Hex Screw 516-18  
Hex Screw, 58-18  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
Wheel Adjustment Cable  
Blade Adjustment Rod  
Bail Handle  
Carriage Bolt, 516-18  
Rope Guide (Eye Bolt)  
Hex Screw, 516-18  
Axle Shaft .50x6.65  
Frame Spacer .50x9.25  
Lock Flange Nut, 516-18  
Flange Nut 38-16  
Flange Nut, 58-18  
Clevis Pin 332 x .625  
Bearing Cup  
710-1205  
710-3180  
Upper Handle  
711- 05696  
711-04440  
712-04063  
712-04065  
712-0417A  
714-3010  
Lower Handle  
Spacer, .63 x 1.12 x 1.06  
Spacer  
Pulley Mount Spacer  
Spacer, .64 x.88 x .50  
Belt  
954-04032B  
756-04148  
956-0449  
756-05069  
781-0427  
718-04012  
720-0142  
720-0279  
720-04072A  
726-0299  
931-04207  
731-05063  
731-05064  
732-0188A  
932-0369  
732-04045  
932-04169  
734-05075  
734-04623  
736-04019  
Flat Idler Pulley, 2.5 OD  
Sheave  
Grip  
Wing Nut  
Combination Flywheel Pulley  
Belt Guard  
Star Knob  
Push Cap 12” rod  
Bearing Block  
781-0741A  
781-0742  
Depth Index Bracket  
Depth Index Lever  
Tri-Star Blade  
Debris Guard  
781-0748  
Blade Guard  
787-01081A  
787-01240  
787-01304  
712-04217  
750-05548  
750-0664  
731-09094A  
710-04509  
Bracket Plate  
Double Torsion Spring  
Compression Spring  
Torsion Spring  
Dual Wheel Bracket  
Frame  
Flange Lock Nut, 3/8-16  
Spacer., .525 x .775 x .93  
Spacer., .505ID x .88OD x .440  
Engine Shroud  
Compression Spring  
Wheel 7 x 1.75 T-Tread  
Wheel 8 x 1.75 T-Tread  
Flat Washer, .531 x 1.25 x .181  
Screw, #10-16 x 1.25  
7
Engine Model 5X65RU Air Cleaner  
117  
118  
120  
121  
Ref. Part Number  
Description  
117  
118  
710-04969  
951-14439  
Bolt M6X30 Af Base/Coil/E-Starter  
Air Cleaner Housing Assembly  
Air Cleaner Kit  
120 951-10298  
121 712-05015  
Nut M6X10Mm Starter/Carb/Muff  
8
 
5X65RU Carburetor  
134  
132  
a
134  
h
g
b
i
j
133  
130  
c
d
e
f
l
k
130  
128  
131  
m
127  
n
126  
o
p
q
129  
r
s
179 - Carburetor Kit  
u
t
v
z
y
w
x
Ref.  
Ref.  
Part Number  
Description  
Part Number  
Description  
i
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
Throttle Shaft  
126  
127  
128  
129  
130  
131  
132  
133  
134  
179  
951-14419  
951-14420  
951-14422  
951-14421  
951-14423  
951-14424  
951-11738  
951-11528  
951-14425  
951-14446  
Air Filter Base Gasket  
Choke Temp Control Bracket  
j
Idle Jet Assembly  
Throttle Shaft Fiber O-Ring  
Idle Speed Adjusting Screw  
Idle Mixture Screw  
Carburetor Body  
Emulsion Tube  
k
l
Choke Temp Control Bracket Gasket  
Choke Temp Control Linkage  
Carburetor Assembly  
Carburetor Gasket  
m
n
o
p
q
r
Carburetor Insulator  
Carburetor Insulator Gasket  
Carb Stud M6×87  
Main Jet  
Fuel Bowl O-Ring  
Needle Valve  
Carburetor Kit  
s
Needle Valve Spring  
Float  
(Incl.e,j,k,l,o,p,q,r,s,t,u,w,z)  
Choke Shaft  
t
a
b
c
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
n/a  
u
v
w
x
y
aa  
Float Pin  
Choke Plate  
Fuel Bowl  
Choke Return Spring  
Choke Shaft Washer  
Choke Shaft Fiber O-Ring  
Throttle Plate  
Fuel Bowl Gasket  
Fuel Bowl Mounting Bolt  
Fuel Drain Plug  
Fuel Drain Plug Gasket  
d
e
f
g
h
Throttle Plate Lock Washer  
Screw M3X6 Throttle Plate  
9
5X65RU Crankcase  
28  
36  
176 - Gasket Kit - Complete  
177 - Gasket Kit -External  
48  
44  
44  
43  
49  
50  
43  
51  
178 - Complete Engine  
52  
53  
54  
46  
45  
47  
172  
84  
83  
89  
166  
168  
82  
88  
90  
167  
161  
72  
169  
71  
166  
81  
80  
86  
64  
64  
85  
86  
75  
79  
48  
48  
74  
73  
10  
5X65RU Crankcase  
Ref.  
Ref.  
Part Number  
Description  
Part Number  
Description  
82  
83  
84  
85  
86  
88  
89  
714-04074  
951-11574  
951-14416  
951-11520  
726-04101  
951-14415  
951-14447  
Governor Arm Shaft Cotter Pin  
Governor Seal  
28  
36  
38  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
64  
71  
72  
73  
74  
75  
79  
80  
81  
951-14402  
712-04219  
712-04209  
750-05384  
710-04980  
710-04918  
951-11622  
951-14403  
710-04916  
951-14404  
951-14405  
951-11596  
951-11730  
732-04718  
951-11614  
710-04915  
951-14408  
951-14409  
951-14410  
951-14411  
951-14412  
951-14413  
951-14414  
951-11529  
Brake Assembly  
Brake Arm Nut  
Governor Arm Shaft  
Breather Hose Assembly  
Breather Hose Clamp  
Crankcase Cover Gasket  
Short Block  
Ground Switch Nuts M4  
Brake Spacer  
Bolt M6X35 Af Base/Brake/Dipstick  
Bolt M6×20 Ignition Coil  
Flexible Clamp, Ignition Coil  
Ignition Coil Assembly  
Bolt M6X14 Multi-Purpose  
Breather Cover Plate  
Breather Gasket  
(Incl.48-54,82-84,88-92,95,97-100,  
110-116,126,132,133,149,152,156,  
157,159-161,166-169,172)  
Main Bearing  
90  
951-11369  
951-14433  
161  
Piston Ring Set  
Upper Crankshaft Seal  
Breather Screen  
166 951-11603  
167 951-14434  
168 951-14435  
Piston Pin Snap Ring  
Piston  
Breather Valve Spring  
Breather Valve  
Piston Pin  
169  
172  
176  
951-14436  
710-05115  
951-14443  
Connecting Rod Assembly  
Connecting Rod Bolt  
Gasket Kit - Complete  
(Incl.50,51,83,88,95,113,116,126,  
128,131-133,149,152,156)  
Gasket Kit -External  
(Incl.50,95,113,126,128,  
131-133,149,152)  
Bolt M6X12 Multi-Purpose  
Choke Linkage  
Throttle Linkage Spring  
Throttle Linkage  
Governor Spring  
177  
178  
951-14444  
Governor Arm Assembly  
Component Bracket  
Air Vane Bracket  
952Z5X65RU  
Complete Engine  
Air Vane  
11  
5X65RU Crankshaft & Crankcase Cover  
92  
91  
94  
95  
48  
99  
44  
48  
96  
97  
98  
100  
95  
112  
114  
175  
110  
113  
111  
112  
115  
112  
112  
112  
112  
112  
116  
Ref. Part Number  
Description  
Ref. Part Number  
Description  
100 951-11549  
Governor Gear/Shaft Assembly  
Crankcase Cover Dowel Pin 7×14  
Crankcase Cover Dowel Pin 9×14  
Bolt M6X28 X65/P65 Crankcase  
Oil Drain Plug Washer  
44  
48  
91  
92  
94  
95  
96  
97  
98  
99  
710-04980  
710-04916  
951-14417  
951-10307  
951-14440  
951-11546  
951-14441  
951-11733  
736-04491  
951-11609  
Bolt M6X35 Af Base/Brake/Dipstick  
Bolt M6X14 Multi-Purpose  
Crankshaft Assembly  
110  
111  
112  
113  
114  
115  
116  
175  
715-04092  
715-04089  
710-04931  
736-04440  
710-04906  
951-14418  
951-11545  
951-10370  
Flywheel Key  
Oil Dipstick Assembly  
Oil Drain Plug  
Dipstick / Oil Fill Tube O-Ring  
Oil Fill Tube Assembly  
Oil Return Seal  
Crankcase Cover  
Lower Crankshaft Seal  
Oil Drain Plug & Washer Assembly  
Crankshaft Thrust Washer  
Governor Gear Mounting Plate  
12  
5X65RU Flywheel & Shroud  
3
1
26  
2
2
2
27  
6
15  
15  
18  
20  
16  
19  
24  
25  
19  
19  
21  
Ref.  
Ref.  
Part Number  
Description  
Part Number  
Description  
19  
20  
21  
24  
25  
26  
27  
750-05320  
951-14442  
951-14126  
951-14400  
951-14127  
712-04287  
951-14401  
Engine Shroud Spacer  
Carbon Canister Assembly  
Carbon Canister  
1
951-14396  
712-04290  
731-07925  
951-11721  
951-14397  
951-14398  
951-14399  
Starter Recoil Assembly  
Starter Acorn Nut  
Starter Handle  
2
3
Carbon Canister Filter  
Carbon Canister Filter Cap  
Flywheel Nut M14  
6
Recoil Pulley & Spring Assembly  
15  
16  
18  
Starter/Shroud Rear Stud M6×78.5  
Starter/Shroud Front Stud M6×74  
Engine Shroud Assembly  
Flywheel  
13  
5X65RU Cylinder Head  
176 - Gasket Kit - Complete  
177 - Gasket Kit -External  
178 - Complete Engine  
121  
154  
121  
155  
160  
153  
64  
152  
157  
173  
136  
159  
151  
174  
158  
137  
156  
151  
OPT  
IONA  
L
159  
138  
158  
157  
136  
139  
136  
141  
138  
141  
135  
142  
144  
143  
136  
145  
145  
149  
48  
146  
147  
148  
150  
48  
146  
147  
148  
48  
48  
14  
5X65RU Cylinder Head  
Ref.  
Ref.  
Part Number  
Description  
Part Number  
Description  
151  
151  
152  
153  
154  
155  
156  
157  
158  
159  
710-05094  
951-10342  
951-14427  
951-14428  
951-14429  
951-14430  
951-14431  
715-04108  
951-10314  
951-14432  
Muffler Stud M6X95  
Muffler Stud Assembly  
Muffler Gasket  
48  
710-04916  
951-14448  
Bolt M6X14 Multi-Purpose  
Cylinder Head Asm  
(Incl.132,133,135,138-143,  
145-149,152,156)  
Cylinder Head Service Kit  
(Incl.136,139,149,156)  
Bolt M8X54 Cylinder Head  
Spark Plug, F5Rtc  
Valve Kit  
135  
Choke Temp Control Thermostat  
Muffler Assembly  
951-14445  
Muffler Shield  
Cylinder Head Gasket  
Cylinder Head Dowel Pin 10×16  
Push Rod Kit  
136  
137  
138  
139  
710-04982  
951-14437  
951-10313  
951-11818  
Tappet  
Intake Valve Seal  
Valve Kit  
160 951-11741  
Camshaft Assembly  
Spark Arrestor  
140 951-10313  
173  
174  
176  
951-10351  
710-04983  
951-14443  
141  
142  
143  
951-12004  
951-11977  
951-11687  
Valve Spring  
Spark Arrestor Screw  
Gasket Kit - Complete  
(Incl.50,51,83,88,95,113,116,126,  
128,131-133,149,152,156)  
Gasket Kit -External  
(Incl.50,95,113,126,128,  
131-133,149,152)  
Valve Spring Retainer  
Push Rod Guide  
Rocker Arm Assembly  
Rocker Arm Stud  
Rocker Arm  
144 951-11606  
145 710-04902  
146 951-12001  
147 751-11123  
148 751-11124  
177  
178  
951-14444  
Fulcrum Nut  
Jam Nut  
952Z5X65RU  
Complete Engine  
149  
150  
951-11551  
951-14426  
Valve Cover Gasket  
Valve Cover  
15  
5X65RU Fuel Tank  
57  
64  
56  
63  
55  
58  
68  
67  
69  
65  
48  
70  
68  
Ref. Part Number  
Description  
48  
55  
56  
57  
58  
63  
64  
65  
67  
68  
69  
70  
710-04916  
731-08133  
951-14406  
731-08104  
951-14407  
931-04629  
710-04915  
951-11680  
951-10358A  
951-11700  
951-14438  
723-04071  
Bolt M6X14 Multi-Purpose  
Fuel Tank Lower Grommet  
Fuel Tank Upper Grommet  
Fuel Tank Nut  
Fuel Cap Assembly  
Fuel Tank  
Bolt M6X12 Multi-Purpose  
Flexible Clamp, Vent Hose  
Fuel Filter  
Fuel Hose Clamp  
Fuel Line Kit  
Plastic Support Clamp  
16  
Notes  
17  
18  
Notes  
Notes  
19  
Y
To order replacement parts, call a Customer Support Representative at (800) 965-4CUB.  
Locate your nearest Cub Cadet dealer at (877) 282-8684  
CUB CADET LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019  

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