Page 1
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 1 of 11
Accessories
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Page 2
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 2 of 11
Accessories
Ref # Part Number DescriptionQty
68899 Piston Assy - 0.005 in. oversize
66790 Ring Set - Piston 0.005 in. oversize
68897 Piston Assy - 0.010 in. oversize
47768 Ring set - Piston 0.010 in. oversize
13639A Clutch, Drum, Bearing & Sprocket Assy - 10 tooth
60315 Clutch Assy
48736A Drum, Bearing & Sprocket Assy - 10 tooth
104460 Bearing - Needle
48737 Spacer - Sprocket
13638A Clutch, Drum, Bearing & Sprocket Assy - 11 tooth
60315 Clutch Assy
48734A Drum, Bearing & Sprocket Assy - 11 tooth
104460 Bearing - Needle
48737 Spacer, Sprocket
13637A Clutch, Drum, Bearing & Sprocket Assy - 12 tooth
60315 Clutch Assy
48714A Drum, Bearing & Sprocket Assy - 12 tooth
104460 Bearing - Needle
48737 Spacer - Sprocket
48637 Sprocket - 10 tooth
48638 Sprocket - 11 tooth
48639 Sprocket - 12 tooth
48711D Kit - Rewind starter
48662 Kit - Engine mounting stud
68047 Kit - Piston pin & bearing tool
68959 Kit - Tuned exhaust (vertical)
68960 Kit - Tuned exhaust (horizontal)
65712 Guide - Timing
48609 Header - Exhaust
66793 Decal - McCulloch powered
66794 Decal - McCulloch
65946 Manual - Kart engine
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K&T Saw Shop 606-678-9623 or 606-561-4983
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Page 3
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 3 of 11
Carburetor Assembly (Part 1)
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K&T Saw Shop 606-678-9623 or 606-561-4983
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Page 4
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 4 of 11
Carburetor Assembly (Part 1)
Ref # Part Number DescriptionQty
68886 Carburetor Assy1
82894 Carburetor Assy1
1 104814 Screw - Pan hd 4-40 x 1/4 (SEMS)1
2 65934 Plate - Choke1
3 82893 Shaft Assy - Choke1
4 100071 Ball - Choke detent1
5 52930 Spring - Choke detent1
6 101796 Pin - Groove1
7 104520 Screw - Pan hd 10-24 x 7/8 (SEMS)4
8 69169 Body - Fuel pump1
9 48911 Filter - Fuel1
10 57274B Diaphragm - Fuel pump1
11 69170 Plate - Diaphragm1
12 66092 Diaphragm - Carburetor1
13 53766A Valve - Check1
14 62910 Screw - Idle speed1
55397 Screw - Idle speed1
15 51705 Spring - Idle screw1
16 104814 Screw - Pan hd 4-40 x 1/4 (SEMS)2
17 50701A Arm - Throttle shaft1
18 65935 Spring - Throttle return1
19 110055 Screw - Fil hd 8-32 x 3/8 (SEMS)1
20 55082 Clip - Shaft1
21 65934 Plate - Throttle1
22 65932 Shaft Assy - Throttle1
23 68893 Needle - Main adjustment1
24 52936 Spring - Needle2
25 52937 Washer - Packing2
26 52938 Packing - Needle2
27 67264 Needle - Idle adjustment1
28 68907 Body Assy - Carburetor1
69812 Body Assy - Carburetor1
29 103460 Screw - Fl hd 4-40 x 1/42
30 66097 Cover - Capillary1
31 66098 Gasket - Cover1
32 104728 Screw - Bind hd 6-32 x 1/41
33 104305 Pin - Lever1
34 55688 Lever - Inlet1
35 57172 Spring - Lever1
36 60163A Set - Needle and body1
37 63038 Needle - Valve1
38 58969 Body - Valve1
39 55689 Washer - Valve1
40 65611 Valve Assy - Check1
68890 Valve Assy - Check1
41 55062A Bushing - Shaft2
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Page 5
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 5 of 11
Carburetor Assembly (Part 2)
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K&T Saw Shop 606-678-9623 or 606-561-4983
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Page 6
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 6 of 11
Carburetor Assembly (Part 2)
Ref # Part Number DescriptionQty
84446 Carburetor Assy1
1 104520 Screw Assy - Pan hd 10-24 x 7/8 (SEMS)4
2 84941 Body - Fuel pump1
3 48911 Filter - Fuel1
4 57274B Diaphragm Assy - Fuel pump1
5 69170 Plate - Diaphragm1
6 66092 Diaphragm - Carburetor1
7 53766A Valve - Check1
8 55397 Screw - Idle speed1
9 51705 Spring - Idle screw1
10 104814 Screw - Pan hd 4-40 x 1/4 (SEMS)2
11 50701A Arm - Throttle shaft1
12 65935 Spring - Throttle return1
13 110055 Screw - Fil hd 8-32 x 3/8 (SEMS)1
14 55082 Clip - Throttle shaft1
15 65934 Plate - Throttle1
16 65932 Shaft Assy - Throttle1
17 84940 Needle Assy - High speed adjustment1
18 67502 Spring - Needle2
19 52937 Washer - Packing2
20 52938 Ring - Packing2
21 84939 Needle - Idle adjustment1
22 84947 Body Assy - Carburetor1
23 101796 Pin - Choke plate1
24 48827 Plug - Choke shaft bore2
25 55062A Bushing - Body2
26 104728 Screw - Lever pin1
27 104305 Pin - Lever1
28 84317 Lever - Inlet1
29 57172 Spring - Lever1
30 83753 Needle - Inlet valve1
31 84942 Screw - Circuit plate3
32 84938 Plate - Circuit1
33 84944 Diaphragm - Check valve1
34 84945 Gasket - Circuit plate1
35 84946 Gasket - Circuit plate1
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K&T Saw Shop 606-678-9623 or 606-561-4983
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Page 7
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 7 of 11
General
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K&T Saw Shop 606-678-9623 or 606-561-4983
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Page 8
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 8 of 11
General
Ref # Part Number DescriptionQty
1 100249 Nut - Hex 1/4-282
2 100153 Lockwasher - 1/42
3 Carburetor Assy See "Carburetor Assembly"
illustrations and parts lists.
4 65939 Gasket - Carburetor1
5 68091 Valve Asy - Reed block1
6 101987 Screw - Rd hd 6-32 x 1/44
7 65904 Plate - Clamp2
8 68074 Valve - Reed2
9 65937 Gasket - Reed block1
68894 Gasket - Reed block1
10 103947 Screw - Hex hd 10-24 x 1 (SEMS)4
11 68889 Adapter Assy - Carburetor1
12 47868 Stud - Adapter2
13 48516 Gasket - Adapter1
14 57565 Cover Assy - Spark plug1
15 55615 Guard - Flywheel1
16 104815 Screw - Hex hd 10-24 x 7/8 (SEMS)4
102760 Screw - Hex hd 10-24 x 14
17 110264 Washer - #104
18 101326 Nut - Hex 10-242
19 68989 Fan Housing1
20 101982 Screw - Hex hd 1/4-20 x 14
21 13643 Washer - Special4
22 67254 Cover - Crankcase bottom1
23 65578 Gasket - Cover1
24 Powerhead Assy See "Powerhead Assembly"
illustration and parts list
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25 104815 Screw - Hex hd 10-24 x 7/8 (SEMS)3
26 101191 Nut - Hex 10-243
84211 Starter Assy1
27 104396 Screw - Pan hd 10-24 x 3/42
28 60647 Cover - Starter1
29 57232 Plate - Handle1
30 57231 Cup - Handle1
31 57230 Handle - Starter1
32 101136 Rivet - Rope1
33 28716 Rope - Starter1
34 57792 Drum - Starter1
35 57790 Ratchet - Starter1
36 51665 Spring - Rewind1
37 84212 Base - Starter1
38 69819 Fan Housing Assy1
39 103819 Rivet1
40 24236 Washer - Special2
41 50818 Spring1
42 50817 Button - Stop switch1
K&T Saw Shop 606-678-9623 or 606-561-4983
K&T Saw Shop 606-678-9623 or 606-561-4983
Page 9
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 9 of 11
Powerhead Assembly
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K&T Saw Shop 606-678-9623 or 606-561-4983
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Page 10
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 10 of 11
Powerhead Assembly
Ref # Part Number DescriptionQty
1 101179 Nut - Hex 7/16-201
2 101270 Washer - 7/161
3 68280 Flywheel Assy1
68282 Flywheel & Pawl Assy1
4 36144B Pin - Starter pawl2
5 24093 Pawl - Starter2
6 50582 Spring - Pawl2
7 103879 Key - Woodruff1
8 102289 Screw - Hex hd 10-24 x 3/43
9 102189 Washer - #103
10 104815 Screw - Hex hd 10-24 x 7/8 (SEMS)1
11 50671 Retainer - Breaker box cover1
12 50588A Cover - Breaker box1
13 65584 Gasket - Breaker box1
14 55494 Screw Assy - Sealing2
15 55492 Washer - Sealing2
16 100251 Nut - Hex 8-321
17 100057 Lockwasher - #81
18 50381A Insulator - Breaker terminal1
19 103672 Screw - Fil hd 8-32 x 1/2 (SEMS)1
20 50076A Breaker Assy1
21 103672 Screw - Fil hd 8-32 x 1/2 (SEMS)1
22 50074 Condenser1
61650 Condenser1
23 50664 Felt - Breaker box1
24 57126A Cover - Crankcase1
25 101326 Nut - Hex 10-242
26 54184 Wiper - Felt1
27 50663 Seal - Oil1
28 104523 "O" Ring1
29 100824 Bearing, Ball1
30 103746 Locknut - Hex 3/8-241
31 103879 Key - Woodruff1
32 65927 Nameplate1
68900 Nameplate1
84705 Nameplate1
33 104815 Screw - Hex hd 10-24 x 7/8 (SEMS)2
34 100352 Washer - #102
35 51251 Lamination Assy1
36 51253 Retainer - Coil2
37 57643A Kit-Coil1
38 50120 Wire Assy - Spark plug1
39 55061 Connector1
40 55060 Boot1
41 55617 Nipple1
42 101883 Wire Assy - Ground1
43 57225 Wire Assy - Primary1
44 83563 Spark Plug - 14 mm - 0.375 reach1
84536 Spark Plug - 14 mm - 0.472 reach1
45 104534 Screw - Skt hd 10-24 x 1-13/326
46 24236 Washer - Special6
47 63895 Head - Cylinder1
84441 Head - Cylinder1
48 65577 Gasket - Cylinder head1
69760 Gasket - Cylinder head1
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Page 11
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A12-400165 MC 91B 11/74 to 04/76 IPL 84456 Page 11 of 11
Powerhead Assembly
Ref # Part Number DescriptionQty
49 68898 Piston Assy1
50 47767 Ring Set - Piston1
51 101206 Bearing - Needle2
104519 Bearing - Needle2
52 47903 Connecting Rod Assy1
53 60210A Screw - Skt hd special2
54 69891 Roller - Needle24
55 62831 Pin - Piston1
69408 Pin - Piston1
56 48586C Crankshaft1
57 65913 Crankcase Assy1
68901 Crankcase Assy1
84325 Crankcase Assy1
58 104128 Seal - Oil1
81949 Seal - Oil1
59 104858 Bearing - Needle1
60 18556A Retainer - Nut4
61 101143 Nut - Hex 1/4-204
62 28053 Retainer - Nut2
63 57063 Retainer - Nut4
64 104255 Retainer - Nut2
65 101326 Nut - Hex 10-248
66 110179 Plug - Expansion 1/2 in.3
67 83374 Insert - Taplok2
68 110196 Screw - Pan hd 8-32 x 7/16 s/t2
69 65917 Cover - Boost port1
70 68924 Gasket - Port cover1
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K&T Saw Shop 606-678-9623 or 606-561-4983
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