Page 1
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HM100-159028 Page 1 of 12
Engine Parts List #1
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HM100-159028 Page 2 of 12
Engine Parts List #1
Ref # Part Number Qty Description
1 34096C Cylinder (CI liner)(3-5/16")(Incl.2,20,41,43,72 & 119)
2 27652 Pin, Dowel
15A 30700 Yoke, Governor
15B 650494 Screw, 6-40 x 5/16"
15 30699C Rod Assy., Governor (Incl. 15A & 15B)
16 33454 Governor Lever Assy.
17 29916 Clamp, Governor lever
18 650548 Screw, 8-32 x 5/16"
19 33857 Spring Assy., Extension (Incl. 19B)
20 32630 Seal, Oil
25 29536 Blower Housing Baffle (Without electric starter knockout)
(Use as required)
25 35256A Blower Housing Baffle (With electric starter knockout) (Use
as required)
26 650561 Screw, 1/4-20 x 5/8"
30 33624A Crankshaft (Incl. 108 & 109)
35 29826 Screw, 10-32 x 3/4"
36 29918 Lockwasher, #8 E.T.
37 29216 Locknut, 10-32
37A 30322 Nut & Lockwasher, 8-32
38 29642 Ring, Retaining
40 34543 Piston, Pin & Ring Set (Std.) (3-3/16 ")
40 34544 Piston, Pin & Ring Set (.010" OS)
40 34545 Piston, Pin & Ring Set (.020" OS)
41 34031B Piston & Pin Ass'y. (Std.)(3-3/16")(I ncl.43)
41 34032B Piston & Pin Ass'y. (.010" OS) (Incl. 43)
41 34033B Piston & Pin Ass'y. (.020" OS) (Incl. 43)
42 34037 Ring Set (Std.) (3-3/16" Bore)
42 34038 Ring Set (.010" OS)
42 34039 Ring Set (.020" OS)
43 27888 Ring, Piston Pin retaining
45 32591C Rod Assy., Connecting (Incl. 46, 47 & 49)
46 650662C Bolt, Connecting rod (2 pieces)
47 650662C Bolt, Connecting rod (2 pieces)
48 34034 Lifter, Valve
49 34242 Dipper, Oil
50 34143 Camshaft (MCR)
60 33273A Extension, Blower housing
65 650128 Screw, 10-24 x 1/2"
69 35262 * Gasket, Flange
70 33626B Cyl.Cover (Incl.71,75,80,179,180,220, 221)
72 27642 Plug, Oil drain
75 33625 Seal, Oil
80 31845 Shaft, Mechanical governor
81 30590A Washer, Flat
82 30591 Gear Assy., Governor (Incl. 81)
83 30588A Spool, Governor
84 29193 Ring, Retaining
86 650833 Screw, 1/4-20 x 1-3/16 (Use as requir ed)
87 650832 Screw, 1/4-20 x 1-11/16" (Use as requ ired)
89 32589 Key, Flywheel
92 650815 Washer, Belleville
93 8116 Nut, Hex
101 610118 Cover, Spark plug
103 650516 Screw, 1/4-20 x 1-1/8"
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HM100-159028 Page 3 of 12
Engine Parts List #1
Ref # Part Number Qty Description
108 29783 Pin, Crankshaft gear (Only serviceable when gear is pinned
to crank.)
109 33245 Gear, Crankshaft
119 34041A * Gasket, Cylinder head
120 34030A Head, Cylinder
125 27878A Exhaust Valve (Std.) (Incl. 151)
125 27880A Exhaust Valve (1/32" OS) (Incl. 151)
126 34035 Intake Valve (Std.) (Incl. 151)
126 34036 Intake Valve (1/32" OS) (Incl. 151)
127 650691 Washer (Do not use with No. 6021A scr ew.)
128 650690 Washer, Belleville (Use as required)
129 650727 Screw, 5/16-18 x 1-3/4 (Use as requir ed)
130 6021A Screw, 5/16-18 x 1-1/2" (Use as required, but do notuse No.
650691 washer.)
130 650711 Screw, 5/16-18 x 1-5/8 " (Use as required) (Can use 6021A
but discard 650691 washer.)
130 650694A Screw, 5/16-18 x 2" (Use as required)
131 650737 Screw, 1/4-20 x 1/2" (Use as required )
131 650738 Screw, 1/4-20 x 5/8 (Use as required)
131A 650713 Screw, 5/16-18 x 5/8"
133 650890 Washer, Internal Lock
135 33636 Resistor Spark Plug
139 33369 Bracket, Governor gear
140 650836 Screw, 10-24 x 1/2"
149 27882 Cap, Upper valve spring
150 27881 Spring, Valve
151 32581 Cap, Lower valve spring
169 27896A * Gasket, Breather
170 28423 Body, Breather
171 28424 Element, Breather
172 28425 Cover, Breather
173 35350 Tube, Breather
174 650128 Screw, 10-24 x 1/2"
182 650517 Screw, 1/4-20 x 27/32"
184 33263 * Gasket, Carburetor
186 33372 Link, Governor lever-to-bellcrank
187A 30196 Screw, 5/16-18 x 3/4"
187 34349A Flange, Carburetor mounting
207 34350 Link, Governor lever-to-throttle
222A Pop Rivet (Can be purchased locally)
224 27915A * Gasket, Intake pipe
250B 33269A Cover, Air cleaner
260 33375D Blower Housing (For electric starter)
261 650788 Screw, 5/16-18 x 3/4"
262 29747B Screw, 5/16-24 x 21/32"
265 33272B Cover, Cylinder head
276 35741 Plate, Muffler locking
277 650729 Screw, 5/16-18 x 3-3/16" (Use as requ ired)
277 651002 Screw, 5/16-18 x 4-1/4" (Use as requi red)
281 33013 Cover, Starter bubble
282 650760 Screw, 8-32 x 7/16"
285A 33662 Hub & Screen Assy.
287 29752 Nut, 1/4-28
290 29774 Fuel Line (Braided 8-1/4")(21cm)(As r equired)
290 30962 Fuel Line (Braided 32")(80cm)(As requ ired)
291 30705 Fuel Line (Braided 16")(40cm)(As requ ired)
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HM100-159028 Page 4 of 12
Engine Parts List #1
Ref # Part Number Qty Description
292 26460 Fuel Line Clamp (Use as required)
298 650665 Screw, 1/4-15 x 7/8"
300 34156A Fuel Tank (Incl. 292 & 301) NOTE: These tanks were
builtwith different size fuel inlet openings. Tanks with the
1-3/16" I.D. opening use fuel cap 34210. Tanks with the
1-1/2" I.D. opening use fuel cap 35355.
301A 410144B Fuel Cap (White Plastic)(Standard) (Use as required) (1.5"
I.D.)
301A 33032 Fuel Cap (Red Plastic) (Spurt Resistant, Low Profile) (Use as
required) (1.5" I.D.)
301A 34210 Fuel Cap (Red Plastic) (Spurt Resistant, High Profile) (Use
as required) (1.5" I.D.)
301A 35355 Fuel Cap (Red Plastic)(1.75" I.D.)
306 29673 * Gasket, Oil filler
310 31297 Dipstick (Incl. 307)
338A 31291 Plug, Cover
340 34154 Plate, Upper fuel tank mtg.
341 34155 Bracket, Lower fuel tank mtg.
342 650561 Screw, 1/4-20 x 5/8"
370A 550223 Decal, Name
370 34346 Decal, Instruction
370 35274 Decal, Instruction
379 631725 Inlet Needle, Seat & Clip Assy.
380 632054 Carburetor (Incl. 184 & 379) (Refer to Division 5, Section A,
page 164 for breakdown or Fiche18B, Grid F-6)
400 33279G * Gasket Set (Incl. items marked *)
420 730225 SAE 30 4-Cycle Engine Oil (Quart)
421 730226 SAE 5W30 4-Cycle Engine Oil (Quart)
422 35824 Muffler Optional
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HM100-159028 Page 5 of 12
Engine Parts List #2
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HM100-159028 Page 6 of 12
Engine Parts List #2
Ref # Part Number Qty Description
37A 30322 Nut & Lockwasher, 8-32
129 650727 Screw, 5/16-18 x 1-3/4 (Use as requir ed)
131A 650713 Screw, 5/16-18 x 5/8"
131 650737 Screw, 1/4-20 x 1/2" (Use as required )
131 650738 Screw, 1/4-20 x 5/8 (Use as required)
187A 30196 Screw, 5/16-18 x 3/4"
187 34349A Flange, Carburetor mounting
222A Pop Rivet (Can be purchased locally)
250B 33269A Cover, Air cleaner
274 35865 Gasket, Exhaust
275A 33714 Muffler (Incl. 284, 284A & 414)
277 650729 Screw, 5/16-18 x 3-3/16" (Use as requ ired)
277 651002 Screw, 5/16-18 x 4-1/4" (Use as requi red)
285A 33662 Hub & Screen Assy.
290 29774 Fuel Line (Braided 8-1/4")(21cm)(As r equired)
290 30962 Fuel Line (Braided 32")(80cm)(As requ ired)
292 26460 Fuel Line Clamp (Use as required)
298 650665 Screw, 1/4-15 x 7/8"
300 34156A Fuel Tank (Incl. 292 & 301) NOTE: These tanks were
builtwith different size fuel inlet openings. Tanks with the
1-3/16" I.D. opening use fuel cap 34210. Tanks with the
1-1/2" I.D. opening use fuel cap 35355.
301A 410144B Fuel Cap (White Plastic)(Standard) (Use as required) (1.5"
I.D.)
301A 33032 Fuel Cap (Red Plastic) (Spurt Resistant, Low Profile) (Use as
required) (1.5" I.D.)
301A 34210 Fuel Cap (Red Plastic) (Spurt Resistant, High Profile) (Use
as required) (1.5" I.D.)
301A 35355 Fuel Cap (Red Plastic)(1.75" I.D.)
306 29673 * Gasket, Oil filler
338A 31291 Plug, Cover
341 34155 Bracket, Lower fuel tank mtg.
342 650561 Screw, 1/4-20 x 5/8"
414 33323 Opt.Muffler Screen (Mini-Bike applica tion)
415 730130 Kit, Exhaust adapter (Incl. 274 & 277 )
418 33700 Cover & Tube, Muffler (use as require d)
419 650578 Screw, 8-18 x 3/8" (use as required)
421 730226 SAE 5W30 4-Cycle Engine Oil (Quart)
422 35824 Muffler Optional
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HM100-159028 Page 7 of 12
Engine Parts List #3
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HM100-159028 Page 8 of 12
Engine Parts List #3
Ref # Part Number Qty Description
19 33857 Spring Assy., Extension (Incl. 19B)
19B 28942 Screw, 10-32 x 3/8"
37A 30322 Nut & Lockwasher, 8-32
129 650727 Screw, 5/16-18 x 1-3/4 (Use as requir ed)
131A 650713 Screw, 5/16-18 x 5/8"
131 650737 Screw, 1/4-20 x 1/2" (Use as required )
131 650738 Screw, 1/4-20 x 5/8 (Use as required)
187 34349A Flange, Carburetor mounting
187A 30196 Screw, 5/16-18 x 3/4"
200B 730152 Control Bracket (Incl.1158-1171)(As r eq.)
201 30201A Lever, Speed control
222A Pop Rivet (Can be purchased locally)
227 730127 Air Cleaner Ass'y. (Incl. 238, 239, 242, 246, 250) (Use as
required)
238 28820 Screw, 10-32 x 1/2"
239 27272A * Gasket, Air cleaner
241 33266 Bracket, Air cleaner
242 33267 Bracket, Air cleaner
245 33268 Element, Air cleaner
250B 33269A Cover, Air cleaner
251 650513 Nut, Wing 1/4-20
285A 33662 Hub & Screen Assy.
290 29774 Fuel Line (Braided 8-1/4")(21cm)(As r equired)
290 30962 Fuel Line (Braided 32")(80cm)(As requ ired)
291 30705 Fuel Line (Braided 16")(40cm)(As requ ired)
293 34385 Impulse Fuel Pump NOTE: 34385 and 33715 (WIP)pumps
are replaced by 35813 and 35800 (WIP) pumps. The 33010
(3000 series) repair kit is still available. The 35791 repair kit
is used with the 35813 and 35800 fuel pumps.
293 33715 Impulse Fuel Pump NOTE: 34385 and 33715 (WIP)pumps
are replaced by 35813 and 35800 (WIP) pumps. The 33010
(3000 series) repair kit is still available. The 35791 repair kit
is used with the 35813 and 35800 fuel pumps.
294 33010 Fuel Pump Repair Kit NOTE: 34385 and 33715 (WIP)pumps
are replaced by 35813 and 35800 (WIP) pumps. The 33010
(3000 series) repair kit is still available. The 35791 repair kit
is used with the 35813 and 35800 fuel pumps.
294 35791 Fuel Pump Repair Kit NOTE: 34385 and 33715 (WIP)pumps
are replaced by 35813 and 35800 (WIP) pumps. The 33010
(3000 series) repair kit is still available. The 35791 repair kit
is used with the 35813 and 35800 fuel pumps.
301A 410144B Fuel Cap (White Plastic)(Standard) (Use as required) (1.5"
I.D.)
301A 33032 Fuel Cap (Red Plastic) (Spurt Resistant, Low Profile) (Use as
required) (1.5" I.D.)
301A 34210 Fuel Cap (Red Plastic) (Spurt Resistant, High Profile) (Use
as required) (1.5" I.D.)
301A 35355 Fuel Cap (Red Plastic)(1.75" I.D.)
303A 34237 Fitting, Fuel
303 32958 Fitting, Fuel
303 33713 Fitting, Fuel line elbow
306 29673 * Gasket, Oil filler
338A 31291 Plug, Cover
370 34346 Decal, Instruction
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HM100-159028 Page 9 of 12
Engine Parts List #3
Ref # Part Number Qty Description
370 35274 Decal, Instruction
421 730226 SAE 5W30 4-Cycle Engine Oil (Quart)
422 35824 Muffler Optional
1158 33578 Spring, Extension
1159 30312 Screw, 10-32 x 1/2"
1160 650399 Screw, 10-32 x 5/8"
1160 28820 Screw, 10-32 x 1/2"
1160 27070 Lockwasher
1161 34351 Lever, Bellcrank
1162 33372 Link, Governor lever-to-bellcrank
1163 29530 Bushing, Bellcrank lever
1163 29530 Bushing, Bell crank lever
1164 28562 Bushing, R.P.M adjusting lever
1165 30199A Speed Adjusting Bracket (Incl. 167 & 168)
1166 33450 Nut, Lock
1167 32924 Spring, Compression
1168 650688 Screw, 10-32 x 1"
1170 34352 Bracket, Idle adjustment
1171 32977 Spring, Torsion
1185 33816 Hub & Screen Assy.
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HM100-159028 Page 10 of 12
Engine Parts List #4
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HM100-159028 Page 11 of 12
Engine Parts List #4
Ref # Part Number Qty Description
1 34096C Cylinder (CI liner)(3-5/16")(Incl.2,20,41,43,72 & 119)
2 27652 Pin, Dowel
23 33627 Bearing, Ball
32 33628 Washer, Thrust
37A 30322 Nut & Lockwasher, 8-32
72 27642 Plug, Oil drain
74 31855 Retainer, Bearing
101 610118 Cover, Spark plug
103 650516 Screw, 1/4-20 x 1-1/8"
129 650727 Screw, 5/16-18 x 1-3/4 (Use as requir ed)
131 650737 Screw, 1/4-20 x 1/2" (Use as required )
131 650738 Screw, 1/4-20 x 5/8 (Use as required)
131A 650713 Screw, 5/16-18 x 5/8"
169 27896A * Gasket, Breather
170 28423 Body, Breather
171 28424 Element, Breather
172 28425 Cover, Breather
173 35350 Tube, Breather
174 650128 Screw, 10-24 x 1/2"
175 650778 Lockwasher
176 650580 Nut, Lock
187 34349A Flange, Carburetor mounting
187A 30196 Screw, 5/16-18 x 3/4"
207 34350 Link, Governor lever-to-throttle
222A Pop Rivet (Can be purchased locally)
238 28820 Screw, 10-32 x 1/2"
239 27272A * Gasket, Air cleaner
241 33266 Bracket, Air cleaner
242 33267 Bracket, Air cleaner
245 33268 Element, Air cleaner
250B 33269A Cover, Air cleaner
251 650513 Nut, Wing 1/4-20
275B 391026 Muffler (Incl. 284, 284A & 416) (This spark arrester
mufflercan be used on any model.)
276 35741 Plate, Muffler locking
277 650729 Screw, 5/16-18 x 3-3/16" (Use as requ ired)
277 651002 Screw, 5/16-18 x 4-1/4" (Use as requi red)
285A 33662 Hub & Screen Assy.
301A 410144B Fuel Cap (White Plastic)(Standard) (Use as required) (1.5"
I.D.)
301A 33032 Fuel Cap (Red Plastic) (Spurt Resistant, Low Profile) (Use as
required) (1.5" I.D.)
301A 34210 Fuel Cap (Red Plastic) (Spurt Resistant, High Profile) (Use
as required) (1.5" I.D.)
301A 35355 Fuel Cap (Red Plastic)(1.75" I.D.)
306 29673 * Gasket, Oil filler
313A 33876 Gasket, Stator (Used only on Std. poi nt ign.)
338A 31291 Plug, Cover
375 610982 Magneto (w/ring gear) (12 Volt, 3 Amp ) NOTE: The
complete magneto is not available as an assembly.
Themagneto number is shown for reference purpose only.
Order component parts individually, as shown in parts list.
(Refer to Division 5, Section B, page 36 for breakdown or
Fiche 18B, Grid F-3
377 30547A Breaker Points (Use with Std. point i gn.)
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HM100-159028 Page 12 of 12
Engine Parts List #4
Ref # Part Number Qty Description
378 610767A Condenser
380 632054 Carburetor (Incl. 184 & 379) (Refer to Division 5, Section A,
page 164 for breakdown or Fiche18B, Grid F-6)
421 730226 SAE 5W30 4-Cycle Engine Oil (Quart)
422 35824 Muffler Optional
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