CH20-64500 Page 1 of 30 Air Intake - Pg. 51 Ref # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Part Number 24 164 14-S M-0639055 24 041 01-S 24 041 06-S 24 094 03-S 24 126 23-S M-0639016 47 083 03-S 24 083 02-S 24 096 01-S 24 032 03-S 12 100 01-S 24 380 03-S 24 344 01-S 24 089 04 24 096 03 Qty 1 4 2 1 1 1 Description Manifold, intake Screw, hex. flange M6x1.0x55 Gasket, intake manifold Gasket, air cleaner base Base, air cleaner Bracket, air cleaner (20 mm stud) Use before Serial No. 2422900017 3 Screw, hex. flange M6x1.0x16 1 Element, air cleaner 1 Element, precleaner 1 Cover, inner air cleaner 1 Seal, inner2-of 30 CH20-64500 Page air cleaner 1 - Pg. 51 Nut, wing Air Intake 2 Pin, latch lever Use before Serial No. 2422900017 2 Latch, lever Use before Serial No. 2422900017 2 Spring, latch Use before Serial No. 2422900017 1 Cover, air cleaner Use before Serial No. 2422900017, for reference only, no longer available separately. Replaced by 24-743-05. 1 1 1 Cup, fuel spitback 27.5 mm stud CV18-25 Bracket, air cleaner 30 mm stud CH18-22 Kit, air cleaner cover Includes 18,19,21-23. Use before Serial No. 2422900017; after Serial No. 2422900007, or after installation of kit, individual kit components may be ordered for replacement Cover, air cleaner Kit, air cleaner knob w/gasket Includes 23 Knob, air cleaner cover 18 19 20 24 109 03 24 126 21-S 24 743 05-S 21 22 23 24 096 24-S 24 755 91 25 341 02 1 1 1 CH20-64500 Page 3 of 30 Blower Housing & Baffles - Pg. 32 Ref # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Part Number 24 027 20-S 24 100 01-S 24 100 02-S 25 139 16-S M-0545016 M-0545020 M-0551016 24 146 02 M-0645016 24 063 20-S 24 063 17-S 24 063 24-S M-0545010 24 063 21 24 146 08 Qty Description 1 Housing, blower Includes 2-4 3 Nut, plastic 2 Nut, plastic 1 Plug, button 9/16" 5 Screw, hex. flange M5x0.8x16 2 Screw, hex. flange M5x0.8x20 1 Screw, hex. flange M5x0.8x16 1 Plate, backing - #2 side 6 Screw, hex. flange M6x1.0x16 1 Baffle, cylinder barrel - #2 side 1 Baffle, valley - #2 side 1 Baffle, valley - #1 side CH20-64500 Page 4 flange 2 Screw, hex. of 30 M5x0.8x10 Blower1Housing & Baffles - barrel - #1 side Replaced by 24-063-30 Baffle, cylinder Pg. 32 1 Plate, backing - #1 side CH20-64500 Crankcase Page 5 of 30 Ref # 1 3 4 5 6 7 8 9 10 13 13 14 14 14 15 16 16 16 17 17 17 17 17 17 17 18 28 Part Number Qty 1 Description Crankcase (Service with Short Block or Miniblock. Refer to Selection Guide TP-2470) 12 380 03 52 139 09-S 24 032 01-S 24 144 01-S X-25-102-S 12 032 01-S X-25-63-S 12 380 04-S 24 067 01 24 067 02 24 874 01-S 24 874 02-S 24 874 03-S 24 018 01-S 24 108 01-S 24 108 02-S 24 108 03-S 12 422 07-S 12 422 08-S 12 422 09-S 12 422 10-S 12 422 11-S 12 422 12-S 12 422 13-S 24 012 05 52 139 02-S 6 Pin, dowel locating 1 Plug, cup 1 Seal, oil front 1 Shaft, governor cross 1 Washer, plain 1/4" 1 Seal, governor cross shaft 1 Washer, plain 1/4" 1 Pin, hitch 2 Connecting Rod (Std.) Replaced by 24-067-05 2 Connecting Rod (.25) To be replaced by 24-067-06 CH20-64500 Page 6 of 30 2 Crankcase Piston w/Ring Set (Std.) Includes 15,16 2 Piston w/Ring Set (.25) Includes 15,16 2 Piston w/Ring Set (.50) Includes 15,16 4 Retainer, piston pin 2 Ring Set (Std.) 2 Ring Set (.25) 2 Ring Set (.50) 1 Shim, camshaft (A.R.) (white) (.02725 - .02875) 1 Shim, camshaft (A.R.) (blue) (.02925 - .03075) 1 Shim, camshaft (A.R.) (red) (.03125 - .03275) 1 Shim, camshaft (yellow) (.03325 - .03475) 1 Shim, camshaft (A.R.) (green) (.03525 - .03675) 1 Shim, camshaft (A.R.) (gray) (.03725 - .03875) 1 Shim, camshaft (A.R.) (black) (.03925 - .04075) 1 Camshaft 2 Plug, hex. hd. 3/8" N.P.T.F. CH20-64500 Crankshaft Page 7 of 30 Ref # 1 2 2 Part Number 24 014 04-S 52 139 09-S 12 139 01-S Qty 1 1 1 Description Crankshaft Includes 2 Plug, cup Use on engines with New Design - 16.88 mm, 5/8" diameter Plug, cup Use on engine with Original Design - 11.40 mm, 7/16" diameter CH20-64500 Crankshaft Page 8 of 30 CH20-64500 Page 9 of 30 Engine Controls - Pg. 47 Ref # 1 2 3 4 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Part Number M-0547050 24 089 03-S 25 452 13-S M-0645016 24 126 13 12 237 01-S SM-0545016 24 468 01-S 24 090 07-S M-0446030 24 090 03-S M-0401030 24 090 05-S 24 079 02-S 41 468 03-S SM-0545020 24 089 01-S 24 090 14-S 24 089 15-S M-0641060 M-0642025 25 158 11-S 24 079 01-S 25 158 08-S Qty Description 1 Nut, hex. flange M5x0.8 1 Spring, choke return 1 Terminal 4 Screw, hex. flange M6x1.0x16 1 Bracket, control 2 Clamp, cable 3 Screw, hex. flange M5x0.8x16 3 Washer, plain 5 mm 1 Lever, throttle actuator 2 Nut, hex. flange M4x0.7 1 Lever, throttle control 2 Screw, hex. cap M4x0.7x30 CH20-64500 Page 10 of 30 1 Lever, choke Engine Controls - Pg.choke 1 Linkage, 47 1 Washer, wave 1 Screw, hex. flange M5x0.8x20 1 Spring, linkage 1 Lever, governor 1 Spring, governor 1 Nut, hex. flange M6x1.0 1 Screw, hex. cap M6x1.0x25 1 Bushing, linkage - black 1 Linkage, throttle 1 Bushing, linkage - natural CH20-64500 Page 11 of 30 Exhaust - Pg. 70 Ref # 1 Part Number M-0829033 Qty 4 Description Stud, exhaust M8x1.25x33 CH20-64500 Page 12 of 30 Exhaust - Pg. 70 CH20-64500 Page 13 of 30 Fuel System - Pg. 41 Ref # 1 2 3 5 6 7 8 11 12 13 14 14 15 16 17 17 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 Part Number 25 353 10-S X-426-9-S 25 050 03-S 24 353 02-S 24 086 12-S 24 393 04 24 100 01-S 47 154 01-S M-0650012 M-0651030 24 853 02 24 853 32-S 24 041 06-S 24 041 17-S 24 053 02 24 053 32 24 086 09-S 24 041 09-S 24 153 02-S 24 337 01-S 24 757 02-S 24 462 01-S 24 154 01-S 24 757 07-S 24 173 02-S 24 089 10-S 24 086 10-S 24 153 03-S 24 337 02-S 24 089 11-S 24 368 01-S 24 757 01-S 24 153 06-S 24 521 01-S 24 153 05-S 24 153 04-S 24 435 01-S 24 086 07-S Description Line, fuel 9" Clamp, hose Filter, fuel Replaced by 24-050-02 Line, fuel 15-1/2" Screw, hex. cap 18 mm Pump, fuel - pulse Nut, plastic Clip Order qty. according to design used on engine Screw, hex. flange M6x1.0x10 Screw, hex. flange M6x1.0x30 Kit, carburetor Includes 15-17, carburetor assembly 24-053-02 CH20-64500 Page 14 of 30 1 Kit, carburetor Includes 15-17, carburetor assembly Fuel System - Pg. 41 24-053-32 1 1 1 1 4 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 Gasket, air cleaner Gasket, carburetor Carburetor assembly Includes 20-41, carburetor repair kit 24-757-03, high altitude kits 24-755-01 & 24-755-02 Carburetor assembly Includes 20-41, carburetor repair kit 24-757-03, high altitude kits 24-755-01 & 24-755-02 Screw, sems pan hd. M4x0.7x16 Gasket, carburetor body O-Ring, slow jet Jet, slow Kit, float repair Valve, inlet needle Clip, inlet needle valve Kit, choke repair Includes 28 Cap, choke lever Spring, idle speed adjusting Screw, idle speed adjusting O-Ring, main jet screw Screw, main jet Spring, idle adjusting Needle, idle adjusting Kit, solenoid assembly Includes 36-41 O-Ring, solenoid Seat, solenoid O-Ring, solenoid O-Ring, solenoid Solenoid Screw, sems pan hd. M4x0.7x8 Qty 2 6 1 1 2 1 2 1 1 2 1 CH20-64500 Gasket Set Page 15 of 30 Ref # Part Number 24 755 107-S 24 050 01-S 24 041 06-S 24 041 14-S 24 041 23-S 24 041 15-S 24 041 17-S 24 041 53-S 24 041 08-S 24 041 02-S 24 041 13-S 24 041 01-S 24 041 29-S 24 100 10-S 24 153 01-S 24 153 08-S 12 153 01-S 25 153 02-S 12 153 02-S 24 153 21-S 24 153 27-S 24 153 23-S 24 018 09-S 12 086 16-S 24 032 04-S 230046-S 24 032 01-S 12 032 01-S 24 032 03-S 52 032 08-S 66 032 05-S 24 072 09-S 24 468 16-S Qty Description 1 Gasket Set 1 Filter, breather 1 Gasket, air cleaner base 1 Gasket, air cleaner base 1 Gasket, breather 1 Gasket, carburetor 1 Gasket, carburetor 1 Gasket, carburetor - plastic intake manifold 2 Gasket, cylinder head 2 Gasket, exhaust 1 Gasket, fuel spitback cup 2 Gasket, intake manifold CH20-64500 Pageoil filter adapter 1 Gasket, 16 of 30 Gasket Set Nut, hex. flange M8x1.25 8 1 O-Ring 11 mm I.D. 1 O-Ring 14 mm I.D. 1 O-Ring 16 mm I.D. 1 O-Ring 23 mm I.D. 1 O-Ring 35 mm I.D. 1 O-Ring 71 mm I.D. 2 O-Ring, plastic intake manifold 2 O-Ring, valve cover 1 Retainer, ring 8 Screw, hex. flange M10x1.5x90 1 Seal 2 1/4" long 1 Seal, breather 1 Seal, front oil 1 Seal, governor cross shaft 1 Seal, inner air cleaner - 1/4" long 1 Seal, rear oil 2 Seal, valve stem 8 Stud, cylinder head, M8x1.25x20, M10x1.5x33, 105 mm long 8 Washer, flat 8 mm CH20-64500 Page 17 of 30 Head/Valve/Breather - Style "A" Ref # 1 2 3 4 7 8 9 10 11 Part Number 24 755 75-S 24 153 12 24 153 09-S 24 086 32-S 25 755 13-S 12 153 03-S 24 445 01-S M-0640034 24 755 61 Qty 1 2 1 8 1 1 1 4 1 Description Kit, valve cover - oil fill Includes 2-5 O-Ring O-Ring Screw, hex. cap - shoulder M6x1.0x23 Kit, oil fill cap Includes 8 O-Ring Strap, lifting Screw, hex. flange M6x1.0x34 Kit, valve train Includes 12-15,39. For individual component reference only, before Serial No. 2520800017. Replaced by 24-755-66 12 13 14 15 16 17 17 18 19 20 21 22 23 24 24 25 26 27 28 29 30 31 32 33 34 35 37 38 39 40 24 146 09 M-0631005 24 186 03 24 194 02 12 086 16-S 24 016 01-S 24 016 02-S 24 318 09-S 235011-S 24 089 02-S 12 173 01-S 12 755 03-S 24 032 05-S 24 017 01-S 24 017 02-S 24 755 74-S 24 402 03-S 12 018 01-S M-0545010 24 050 01-S 24 033 01-S X-75-23-S 24 041 23-S X-426-9-S 24 326 06 M-0645020 24 318 10-S 24 041 08-S 24 411 04 12 351 01 1 Plate, guide Use CH20-64500 Page 18 of 30 before Serial No. 2520800017. Replaced by 24-755-66 Head/Valve/Breather - Style "A" 1 Washer, plain 6 mm Use before Serial No. 2520800017 4 Arm, rocker Use before Serial No. 2520800017 4 Pivot, rocker arm Use before Serial No. 2520800017. Replaced by 24-755-66 8 2 2 1 4 4 4 4 2 2 2 1 1 1 1 1 1 1 1 1 1 4 1 2 4 4 Screw, hex. flange M10x1.5x91 Valve, exhaust (Std.) Valve, exhaust (.25 O.S.) Head assembly, #1 cylinder Retainer, spring Spring, valve Cap, valve spring Kit, retainer Seal, valve stem Valve, intake (Std.) Valve, intake (.25 O.S.) Kit, valve cover - plain Includes 2,4,5 Reed, breather Retainer, breather reed Screw, hex. flange M5x0.8x10 Filter, breather Kit, breather w/plug Includes 31,32 Plug, allen hd. 1/8" Gasket, breather Clamp, hose Hose, breather Screw, hex. flange M6x1.0x20 Head assembly, #2 cylinder Gasket, cylinder head Rod, push Use after Serial No. 2424400007. Replaced by 24-755-66 Lifter, valve CH20-64500 Page 19 of 30 Head/Valve/Breather - Style "B" Ref # 1 2 3 4 7 8 9 10 37 38 40 42 Part Number 24 755 75-S 24 153 12 24 153 09-S 24 086 32-S 25 755 13-S 12 153 03-S 24 445 01-S M-0640034 24 318 10-S 24 041 08-S 12 351 01 24 755 66-S Qty Description 1 Kit, valve cover - oil fill Includes 2-5 2 O-Ring 1 O-Ring 8 Screw, hex. cap - shoulder M6x1.0x23 1 Kit, oil fill cap Includes 8 1 O-Ring 1 Strap, lifting 4 Screw, hex. flange M6x1.0x34 1 Head assembly, #2 cylinder 2 Gasket, cylinder head 4 Lifter, valve 1 Kit, valve train Includes 43-45. Use before Serial No. CH20-64500 Page 20 ofafter Serial No. 2520800007 or after installation 2520800017, 30 Head/Valve/Breather - Style "B" of kit, individual marked* components can be ordered for replacement. 1 1 1 Pivot, cylindrical rocker arm Arm, rocker Rod, push 43 44 45 24 599 01-S 25 186 01-S 24 411 05-S ...