Scott Bonnar Model 40 — Parts Diagram & Spare Parts List – Scott Bonnar

The Flymo–Scott Bonnar factory parts list for the Model 40 cylinder mower, covering both the 400418 and 400426 variants. Every part is listed below with its illustration number, quantity and a separate part number for each model, alongside the full chassis illustration.

Models400418 and 400426
Pages5
PublicationSection 1-50

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Exploded chassis illustration for the Scott Bonnar Model 40 cylinder mower, models 400418 and 400426 — Page 1 — chassis illustration · click to enlarge

Scott Bonnar Model 40 parts list, sideframes, rollers, soleplate and cutter — Page 2 — illustration nos. 1 to 27 · click to enlarge

Scott Bonnar Model 40 parts list, cutter housing, sprockets, drum and clutch — Page 3 — illustration nos. 28 to 65 · click to enlarge

Scott Bonnar Model 40 parts list, engine shaft, drive unit, chains and handles — Page 4 — illustration nos. 66 to 113 · click to enlarge

Scott Bonnar Model 40 parts list, clutch cable, grass box, engine options and exhaust — Page 5 — illustration nos. 114 to 132 · click to enlarge

Full parts list (text)

This is a full transcription of Section 1-50 of the Flymo–Scott Bonnar parts book, covering the Model 40 cylinder mower in both variants: 400418 and 400426. The Illus. No. column matches the numbers on the chassis illustration (page 1 in the viewer above).

Most parts are shared between the two models, so both columns usually carry the same number. Where they differ — notably the engine, engine table, drive unit cover and throttle control — each model has its own part number, and a dash (—) means the part is not used on that model.

The two models were fitted with different engines: the 400418 used a Villiers 75 c.c. Spec. 2105X, and the 400426 a Briggs & Stratton Model 60102, Type 0302-01.

Illustration nos. 1–27 — sideframes, rollers, soleplate and cutter

Scott Bonnar Model 40 parts, illustration numbers 1 to 27
Illus. No.	Description	No. per	Model 400418	Model 400426
1	L.H. Sideframe	1	401015	401015
2	R.H. Sideframe	1	401023	401023
3	Front Roller	1	401031	401031
4	Front Roller Shaft	1	401058	401058
5	Front Roller Shaft Nut	2	2321208	2321208
7	Frt. Roller Shaft Washer	2	3651209	3651209
8	Roller Shaft Spacer Washer	2	163811	163811
9	L.H. Frt. Roller Quadrant	1	401074	401074
10	R.H. Frt. Roller Quadrant	1	401082	401082
11	Frt. Roller Quad. Bolt	2	191011	191011
12	Frt. Roller Quad. Nut	2	2321180	2321180
12	Soleplate Mntg. Nut	4	2321180	2321180
12	Pivot Bolt Nut	2	2321180	2321180
12	Purchase Block Nut	2	2321180	2321180
12	Inter. Brkt. Nut	2	2321180	2321180
12	Handle Stay Bar Nut	2	2321180	2321180
12	Pivot Stay Bar Nut	2	2321180	2321180
12	Handle Pivot Clamping Nut	2	2321180	2321180
12	Handle Mntg. Nut	4	2321180	2321180
12	Eng. Mntg. Nut	4	—	2321180
12	Eng. Mntg. Nut	2	2321180	—
12	Drive Unit Hsng. Nut	3	2321180	2321180
12	Drive Unit Brng. Nut	1	2321180	2321180
13	Frt. Roller Quad. Washer	2	3651180	3651180
13	Pivot Bolt Washer	2	3651180	3651180
13	Eng. Mntg. Washer	4	—	3651180
14	Deflector	1	401103	401103
15	Deflector Mounting Screw	2	2061567	2061567
16	Deflector Mounting Washer	2	3691125	3691125
17	Soleplate	1	401154	401154
18	Soleplate Mntg. Bolt	4	191070	191070
18	Cutter Brng. Hsng. Pivot Bolt	2	191070	191070
19	Soleplate Mntg. Washer	4	3661186	3661186
19	Inter. Brkt. Lock Washer	2	3661186	3661186
19	Eng. Mntg. Lock Washer	4	—	3661186
19	Eng. Mntg. Lock Washer	3	3661186	—
19	Eng. Table Mounting Washer	4	3661186	3661186
19	Handle Bar Mntg. Washer	4	3661186	3661186
20	Bottom Blade	1	391427	391427
21	Bottom Blade Screw	4	2071924	2071924
22	Cutter Assy.	1	403539	403539
23	L.H. Cutter Brng. Hsng.	1	331310	331310
24	R.H. Cutter Brng. Hsng.	1	331301	331301
25	Cutter Brng. Hsng. Pivot Bush	2	331037	331037
26	Cutter Bearing	2	1127459	1127459
27	Cutter Bearing Shield	2	331061	331061

Illustration nos. 28–65 — cutter housing, sprockets, drum and clutch

Scott Bonnar Model 40 parts, illustration numbers 28 to 65
Illus. No.	Description	No. per	Model 400418	Model 400426
28	L.H. Cutter Brng. Hsng. Cover	1	331352	331352
29	Pivot Bolt Lock Washer	2	3711180	3711180
29	Purchase Block Washer	2	3711180	3711180
29	Handle Stay Bar Washer	2	3711180	3711180
29	Pivot Stay Bar Washer	2	3711180	3711180
29	Handle Pivot Clamping Washer	2	3711180	3711180
29	Drive Unit Hsng. Washer	3	3711180	3711180
30	Cutter Housing Purchase Block	2	331360	331360
31	Cutter Top Adj. Screw	2	331379	331379
32	Cutter Bottom Adj. Screw	2	331395	331395
33	L.H. Cutter Brng. Hsng. Clamp Bolt	1	331344	331344
34	Hsng. Clamp Bolt Washer	1	3651164	3651164
35	Cutter Top Adj. Screw Locknut	2	331045	331045
36	Cutter Sprocket 14T	1	401189	401189
37	Inter. Sprocket Adj. Bracket	1	401197	401197
38	Inter. Spindle Washer	1	3651243	3651243
39	Inter. Spindle Circlip	1	1501018	1501018
40	Inter. Brkt. Bolt	2	191020	191020
40	Handle Mntg. Bolt	4	191020	191020
41	Inter. Brkt. Washer	2	3659003	3659003
42	Inter. Sprocket w/- Bush	1	401226	401226
43	Inter. Sprocket Bush	1	3111280	3111280
44	Drum Shaft	1	401250	401250
45	Drum Shaft Nut	2	2321224	2321224
45	Eng. Shaft Nut	1	2321224	2321224
46	Drum Shaft Washer	2	3651225	3651225
47	Drum Shaft Support	1	401269	401269
48	Drum Shaft Support Screw	2	3182289	3182289
48	Drum Sprocket Screw	3	3182289	3182289
49	Drum Shaft Support Nut	2	2321163	2321163
49	Eng. Shaft Brng. Hsng. Nut	2	2321163	2321163
50	Drum Shaft Support Washer	2	3711163	3711163
50	Drum End Washer	3	3711163	3711163
50	Drum Sprocket Washer	3	3711163	3711163
50	Eng. Shaft Brng. Washer	2	3711163	3711163
51	Drum	1	191206	191206
52	Drum End	1	401277	401277
53	Drum Bearing	2	1129017	1129017
54	Drum Brng. Inner Seal Washer	2	191214	191214
55	L.H. Drum Brng. Outer Seal Washer	1	191222	191222
56	R.H. Drum Brng. Dirt Shield	1	331555	331555
57	L.H. Drum Brng. Retainer	1	1502380	1502380
58	Drum R.H. Spacer Tube (Short)	1	401285	401285
59	Drum L.H. Spacer Tube (Long)	1	401293	401293
60	Clutch Plate & Lining Assy.	1	401306	401306
61	Drum Clutch Lining	1	333032	333032
62	Clutch Plate Oil Clip	1	191230	191230
63	Drum Clutch Thrust Race	1	3532047	3532047
64	Drum Sprocket 28T	1	401322	401322
65	Clutch Lever Arm Spring	1	401330	401330

Illustration nos. 66–113 — engine shaft, drive unit, chains and handles

Scott Bonnar Model 40 parts, illustration numbers 66 to 113
Illus. No.	Description	No. per	Model 400418	Model 400426
66	Clutch Lever Arm Screw	1	2111011	2111011
67	Drum Clutch Lever Arm	1	401349	401349
68	Clutch Lever Arm Pivot	1	3324027	3324027
69	Drum Clutch Thrust Pad	1	401357	401357
70	Engine Shaft	1	401381	401381
71	Engine Shaft Bearing	2	1121204	1121204
72	Eng. Shaft Brng. Shield	1	401390	401390
73	Eng. Shaft Brng. Hsng.	1	403045	403045
74	Brng. Hsng. Bolt	2	1212743	1212743
75	Engine Shaft Sprocket 11T	1	401402	401402
76	Engine Shaft Dirt Sleeve	1	403053	403053
77	Engine Shaft Key	2	3802051	3802051
78	Engine Sprocket Washer	1	3661224	3661224
79	Engine Shaft Nut (Drum End)	1	2441244	2441244
80	Engine Shaft Washer (Drum End)	1	3711242	3711242
81	Drive Unit Housing	1	401410	401410
82	Drive Unit Hsng. Bolt	3	3182307	3182307
82	Drive Unit Brng. Pivot	1	3182307	3182307
82	Eng. Table Mntg. Bolt	4	3182307	3182307
83	Drive Unit Brng. Housing	1	401437	401437
84	Drive Unit Tension Spring	1	401461	401461
85	Tension Spring Adj. Screw	1	401470	401470
86	Tension Spring Adj. Nut	1	2481126	2481126
87	Drive Unit Brng. Shield	1	401488	401488
88	Drive Unit Cam	1	401496	401496
89	Drive Unit Oper. Handle	1	401525	491525
90	Oper. Handle Nut	1	2601165	2601165
91	Oper. Handle Tension Washer	1	3731028	3731028
92	Oper. Handle Pin	1	2211039	2211039
93	Friction Drum	1	401533	401533
94	Drive Unit Cover	1	401963	403213
95	Drive Unit Cover Screw	3	3511017	3511017
96	Chain Cover	1	403109	403109
97	Chain Cover Nut	2	403352	403352
98	Chain Cover Plug	1	3521012	3521012
99	Eng./Inter./Cutter Chain	1	2981600	2981600
100	Inter./Drum Chain	1	2981369	2981369
101	Top L.H. Handle	1	401584	401584
102	Top R.H. Handle	1	401998	403221
103	Bottom Handle	2	401656	401656
104	Clutch Lever	1	403010	403010
105	Clutch Lever Pivot	1	2932081	2932081
106	Lever Pivot Retainer	1	2501036	2501036
107	Clutch Lever Hand Grip	1	191097	191097
108	Handle Spacer Plate	2	332056	332056
109	Handle Pivot Stay Bar	1	401680	401680
110	Handle Pivot Clamping Bolt	2	1212761	1212761
111	Handle Stay Bar	1	401699	401699
112	Handle Bar Grip	2	403037	403037
113	Clutch Wire Nipple Anchor	1	403299	403299

Illustration nos. 114–132 — clutch cable, grass box, engine and exhaust

Scott Bonnar Model 40 parts, illustration numbers 114 to 132
Illus. No.	Description	No. per	Model 400418	Model 400426
114	Clutch Cable and Casing Assy.	1	403280	403280
115	Clutch Cable Elbow	1	1591139	1591139
116	Cable Adjustor	1	1591112	1591112
117	Cable Clip	2	1411012	1411012
118	Grass Box	1	401736	401736
119	Engine Table	1	403096	403125
120	Engine Mntg. Plate Rear	1	401891	—
121	Eng. Mntg. Bolt Rear	2	—	1213807
121	Eng. Mntg. Bolt Rear	1	1214842	—
122	Eng. Mntg. Bolt Assy. Front	1	401904	403133
123	Eng. Base Spacer	1	401920	—
124	Friction Roller	1	403150	403150
125	Friction Roller Key	1	401939	403184
125A	Friction Roller Spacer	1	—	403476
126	Roller Key Retainer	1	403192	403192
127	Throttle Control Cable Assy.	1	6028438	403205
128	Throttle Control Lever	1	1601019	1601035
129	Drum End Screw	3	3142287	3142287
130	Engine Briggs & Stratton Model 60102, Type 0302-01	1	—	403117
130	Engine Villiers 75 C.C. Spec. 2105X	1	6000010	—
131	Exhaust Box and Deflector Assy.	1	401947	403256
132	Exhaust Box Lock Nut	1	403336	—

Transcribed from the original Flymo–Scott Bonnar parts book, Section 1-50. The scanned pages in the viewer above are the authoritative source — if a number matters for an order, check it against the scan.

Known misprint in the original: illustration no. 89 (Drive Unit Oper. Handle) is printed as 491525 in the Model 400426 column. Every other number in that family begins 40, and the 400418 column shows 401525, so this is almost certainly a typesetting error for 401525. It is reproduced above exactly as printed.