Murray Lawn Mower 7800864 Users Manual ILLUSTRATED PARTS LIST 20 4.5GT Walk 7800888 MD20450FC, EM2045

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Parts Manual

Walk Behind Mower

Models
Mfg. No.

Description

7800864
7800888

EM2045, 4.5GT 20" Walk Behind Mower, CE (2012)
MD20450FC, 4.5GT 20" Walk Behind Mower, CE (2012)

Manual Part No.

1754788

Revision Rev. Date: 3/5/2012

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Table Of Contents
PRODUCT COMPONENTS

PAGES

Handle Assembly .................................................................................................................................................
Deck & Engine Group ..........................................................................................................................................
Decal Group .........................................................................................................................................................

4
6
8

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Torque Specification Chart ..................................................................... Inside Back Cover

Handle Assembly
7800711ha

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NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.

The above parts group applies to the following Mfg. Nos.:
7800864 - EM2045
7800888 - MD20450FC

© Copyright 2012 by Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved

4

1754788

Handle Assembly
REF NO PART NO.

QTY. DESCRIPTION

7301150AYP
1101454E701MA
7104326AYP
1101093MA
043956MA
1908125MA
7090947YP
7024641YP
1101352MA
1931317SM

2
1
1
1
1
9
4
2
1
4

HANDLE
BRACKET, Stop Lever
LEVER, Stop
CABLE, Stop
GUIDE, Rope
NUT, Hex Nylock, 1/4-20
BOLT, Carriage, Short Neck, 1/4-20 x 1-3/8
WIRE TIE, 5.5"
CLIP, CABLE
BOLT, Carriage, Short Neck, 1/4-20 x 3/4, G5

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1
3
4
6
7
8
9
10a
10b
11

Footnotes

The above parts group applies to the following Mfg. Nos.:
7800864 - EM2045
7800888 - MD20450FC

© Copyright 2012 by Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved

5

1754788

Deck & Engine Group
7800711dk

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NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.

The above parts group applies to the following Mfg. Nos.:
7800864 - EM2045
7800888 - MD20450FC

© Copyright 2012 by Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved

6

1754788

Deck & Engine Group
QTY. DESCRIPTION

09T502-3121-H1

1

1

09L602-0110-F1

1

2
3
4
5
5
6
7
8
9
10
11
13
14
15
16
17
18
19
20
21

----7090324SM
009X10MA
7101738YP
7102068YP
17X168ZMA
26X245MA
7300714YP
671912MA
01X121MA
017X37MA
1908125MA
671929MA
071056MA
042785E701MA
17X137MA
1918266SM
01X142MA
1499MA
17X191MA

1
3
4
4
4
4
2
1
1
2
2
2
1
1
1
2
1
1
4
1

* ENGINE, 450 Series, Briggs & Stratton (Engine Model: 09T502-0121-B1) (Used on
EM2045)
* ENGINE, 450 Series, Briggs & Stratton (Engine Model: 09L602-0110-F1) (Used on
MD20450FC)
HOUSING, 20"
CAPSCREW, Hex Washer Head, Self Tap, 3/8C x 1
BOLT, Shoulder, 3/8-16 x 2
WHEEL, 6 x 1.50 (Used on EM2045)
WHEEL, 7 x 1.50 (Used On MD20450FC)
WASHER, Flat, 3/8
CAPSCREW, Hex Washer Head, SEMS, #10 x 1/2
EXTENSION
GUARD, Rear
BOLT, Hex, 1/4-20 x 3/4
WASHER, 1/4
NUT, Hex Nylock, 1/4-20
DEFLECTOR
ADAPTER, Blade
BLADE, 20"
WASHER, Blade
WASHER, 3/8
BOLT, Hex, 3/8-24 x 1-1/2
NUT, Hex Flange, Serrated, 3/8-16
WASHER, Plain, .40

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1

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REF NO PART NO.

Footnotes
Note* To verify your specific engine model, please reference the ID Tag located on your engine. See your local Briggs &
Stratton distributor for parts and service.
The above parts group applies to the following Mfg. Nos.:
7800864 - EM2045
7800888 - MD20450FC

© Copyright 2012 by Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved

7

1754788

Decal Group
7800864dcl

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NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.

The above parts group applies to the following Mfg. Nos.:
7800864 - EM2045
7800888 - MD20450FC

© Copyright 2012 by Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved

8

1754788

Decal Group
REF NO PART NO.

QTY. DESCRIPTION

7029782MA
7104063YP
7102124YP
7102124YP
7101084YP
7101495YP
7103405YP
7103406YP

1
1
1
1
1
1
1
1

DECAL, OPC BAIL
DECAL, 450 Series
DECAL, Logo, Deck (Used on EM2045)
DECAL, Logo, Deck (Used on MD2045FC)
DECAL, Warning, Multi Panel (Used on EM2045)
DECAL, CPSC, FR / NG (Used on MD2045FC)
DECAL, Danger, FR / ENG (Used on MD2045FC)
DECAL, Warning, FR / ENG (Used on MD2045FC)

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1
2
3
3
4
5
6
7

Footnotes

The above parts group applies to the following Mfg. Nos.:
7800864 - EM2045
7800888 - MD20450FC

© Copyright 2012 by Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved

9

1754788

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Hardware Identification & Torque Specifications
Torque Specification Chart

Torque Specification Chart

FOR STANDARD METRIC MACHINE HARDWARE (Tolerance ± 20%)
5.6

8.8

Class 5.6

10.9
Class 10.9

Class 8.8

SAE Grade 2

Class 12.9

Size Of
Hardware

Nm.

in/lbs
ft/lbs

Nm.

in/lbs
ft/lbs

Nm.

in/lbs
ft/lbs

Nm.

M3
M4
M5
M6
M7
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
M33
M36
M39

.56
1.28
2.50
4.3
7.1
10.5
21
36
58
88
121
171
230
295
435
590
800
1030
1340

13.44
30.72
60.96
7.3
12.1
17.7
35
61
101
147
202
290
390
497
733
995
1349
1740
2249

1.28 19.2
2.90 43.44
5.75 5.97
9.9 10.3
16.5 16.9
25
24
50
48
83 86.2
136
132
210
200
287
275
405
390
559
530
708
375
995 1032
1350 1401
1830 1902
2360 2441
3050 3163

1.80
4.10
8.10
14
23
34
67
117
185
285
390
550
745
960
1400
1900
2580
3310
4290

22.92
52.56
7.15
12.1
19.9
29
59
103
162
250
346
486
656
840
1239
1681
2278
2935
3798

2.15
4.95
9.7
16.5
27
40
81
140
220
340
470
660
890
1140
1680
2280
3090
3980
5150

20

10

30

40

50

60

80

70

90

Body
Diameter

Screw, M8- 1.25 x 25

Thread
Diameter (mm)
Threads
Inside
Diameter (in) per inch

1/4

1/2

1
3/4

2.1
2.3
3.1
3.5
7.6
8.6
15.0
16.3
27.2
31.3
40.8
47.6
68.0
74.8
88.4
102.0
122.4
136
217.6
244.8
190.4
210.8
299.2
326.4

Body
Length (mm)
Body
Length (in)

in/lbs
ft/lbs
30
31
43
49
8
10
17
19
30
35
50
55
75
90
110
120
150
180
260
300
400
440
580
640

SAE Grade 8

Nm.

in/lbs
ft/lbs

Nm.

3.4
3.5
4.9
5.5
10.9
13.6
23.1
25.8
40.8
47.6
68.0
74.8
102.0
122.4
149.6
163.2
204.0
244.8
353.6
408.0
544.0
598.4
788.8
870.4

41
43
60
68
12
14
25
29
45
50
70
80
110
120
150
170
220
240
386
420
600
660
900
1,000

4.6
4.9
6.8
7.7
16.3
19.0
34.0
34.0
61.2
68.0
95.2
108.8
149.6
163.2
204.0
231.2
299.2
326.4
525.0
571.2
816.0
897.6
1,244.0
1,360.0

NOTES

1. These torque values are to be used for all hardware
excluding: locknuts, self-tapping screws, thread forming
screws, sheet metal screws and socket head setscrews.
2. Recommended seating torque values for locknuts:
a. for prevailing torque locknuts - use 65% of grade 5
torques.
b. for flange whizlock nuts and screws - use 135% of
grade 5 torques.
3. Unless otherwise noted on assembly drawings, all torque
values must meet this specification.

Screw, 1/2- 16 x 2

Nut, 1/2-16
0

Distance between
threads (mm)
Threads
per inch

Thread
Diameter (mm)
Body
Diameter

SAE Grade 5

Nm.

100

Body Length

Nut, M8

19
20
27
31
66
76
11
12
20
23
30
35
50
55
65
75
90
100
160
180
140
155
220
240

8-32
8-36
10-24
10-32
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
7/8-9
7/8-14
1-8
1-12

The guides and ruler furnished below are designed to
help you select the appropriate hardware.

0

in/lbs
ft/lbs

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in/lbs
Size Of
Hardware ft/lbs
5.88
13.44
26.4
44.64
5.2
7.7
15
26
42
64
89
126
169
217
320
435
590
759
988

No
Marks

Hardware
Grade

12.9

n

Property
Class

FOR STANDARD MACHINE HARDWARE (Tolerance ± 20%)

1/4

1/2

2
3/4

1/4

1/2

3
3/4

1/4

1/2

4

Common Hardware Types

3/4

Hex Head Capscrew

Washer

Standard Hardware Sizing
When a washer or nut is identified as 1/2” (M8), this is
the Nominal size, meaning the inside diameter is 1/2 inch
(8mm metric thread diameter); if a second number is present
it represents the threads per inch (distance between threads).
When bolt or capscrew is identified as 1/2 - 16 x 2” (M8 - 1.25 x 50 ),
this means the Nominal size, or body diameter is 1/2 inch (8mm
metric thread diameter), the second number,16, represents the
threads per inch, (1.25 thread diameter). The final number is the
body length of the bolt or screw, 2 inches (50mm).

Lockwasher
Carriage Bolt
Hex Nut

Wrench & Fastener Size Guide

1/4” Bolt or Nut
Wrench—7/16”

5/16” Bolt or Nut
Wrench—1/2”

3/8” Bolt or Nut
Wrench—9/16”

M6 Bolt or Nut
Wrench—10mm

M8 Bolt or Nut
Wrench—13mm

M10 Bolt or Nut
Wrench—17mm

7/16” Bolt or Nut
1/2” Bolt or Nut
Wrench (Bolt)—5/8”
Wrench—3/4”
Wrench (Nut)—11/16”
M12 Bolt or Nut
Wrench—19mm

M14 Bolt or Nut
Wrench—22 mm

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IT IS THE POLICY OF BRIGGS & STRATTON CORP. TO IMPROVE ITS PRODUCTS
WHENEVER IT IS POSSIBLE AND PRACTICAL TO DO SO. WE RESERVE THE RIGHT TO
MAKE CHANGES OR ADD IMPROVEMENTS AT ANY TIME WITHOUT INCURRING ANY
OBLIGATION TO MAKE SUCH CHANGES ON PRODUCTS.

Briggs & Stratton Power Products Group
12301 W. Wirth Street
Wauwatosa, WI, 53222 USA
www.BRIGGSandSTRATTON.com
www.murray.com
© Copyright 2012 by Briggs & Stratton Corporation
Milwaukee, WI, USA. All rights reserved



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Title                           : ILLUSTRATED PARTS LIST - Murray 20" 4.5GT Walk Mower 7800888 - MD20450FC, 7800864 - EM2045
Creator                         : 46468
Description                     : Parts Manual
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