Illustrated Parts Manual Self-Propelled Mowers MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 Printed In USA Form No.
To The Owner Thank You Thank you for purchasing an MTD Lawn Mower. It was carefully engineered to provide excellent performance when properly operated and maintained. All information in this manual is relative to the most recent product information available at the time of printing. Please be aware that this Illustrated Part’s Manual may cover a range of product specifications for various models. Components listed and/or illustrated in this manual may not be applicable to all models.
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Model Series 12A-AOX 44 36 42 37 43 39 41 40 24 46 6 25 3 47 5 45 14 27 4 3 31 12 17 13 A 3 15 1 7 16 52 38 20 23 49 A 48 35 18 30 29 34 22 10 11 33 4 50 9 32 53 21 8 28 19 38 2 51 53 32 19 26
Model Series 12A-AOX Ref No. Part Number Ref No. Part Number 1 787-01871A Deck , 21” 29 917-04801 Spur Gear, 14T - RH 2 941-00019 Bearing Assembly 3 710-04995A Screw, 5/16-14 x .750 30 917-04802 Spur Gear, 14T - LH 710-04531 Screw, 1/4-20 x .390 4 712-04222 Nut, Sq., 1/4-20 31 918-04881A Transmission Assembly 5 749-04608A 6 710-04998 Lower Handle 32 712-04217 Flange Lock Nut, 3/8-16 Carriage Screw ,5/16-18 33 734-04581 Front Wheel, 8 x 1.
Model Series 12A-A1X 44 36 42 15 43 41 37 14 39 24 40 46 6 25 18 5 47 16 3 16 17 45 27 4 1 7 3 20 12 3 31 13 23 38 49 48 30 29 19 21 35 28 2 38 50 51 22 8 34 9 10 11 32 33 32 6 19 26
Model Series 12A-A1X Ref No. Part Number Ref No. Part Number 1 787-01876A Deck , 21” 27 931-04535B Engine Baffle 2 3 941-00019 Bearing Assembly 28 911-04142A Rear Axle Assembly 710-04995A Screw, 5/16-14 x .750 29 917-04801 Spur Gear, 14T - RH 4 712-04222 Nut, Sq., 1/4-20 917-04802 Spur Gear, 14T - LH 5 749-04608A Lower Handle 30 710-04531 Screw, 1/4-20 x .390 6 710-04998 Carriage Screw ,5/16-18 31 918-04881A Transmission Assembly 7 710-04683A Screw, 3/8-16 x 1.
Model Series 12A-B2X 44 15 36 42 14 43 38 39 41 24 40 46 6 25 18 5 53 16 3 40 16 17 45 56 27 4 1 7 3 52 12 3 57 59 23 37 20 58 31 13 49 48 A 21 35 47 30 29 50 22 8 28 34 37 2 51 9 55 32 10 11 33 54 8 32 19 26
Model Series 12A-B2X Ref No. Part Number Ref No. Part Number 1 787-01871A Deck, 21” 31 918-04881A Transmission Assembly 2 3 941-00019 Bearing Assembly 32 712-04217 Flange Lock Nut, 3/8-16 710-04995A Screw, 5/16-14 x .750 33 734-04581 Front Wheel, 8 x 1.8, Bar, Gray 4 712-04222 Nut, Sq., 1/4-20 634-05040 Front Wheel, 8 x 2.0, Zag. Black 5 749-04608A Lower Handle 634-04625 Rear Wheel, 11 x 1.75, Bar, Gray 6 710-04998 Carriage Screw ,5/16-18 634-05062 Rear Wheel, 11 x 2.
Model Series 12AV/GB2X 44 36 15 42 43 64 4 67 61 71 75 14 74 77 37 39 41 24 40 46 6 70 25 18 5 65 53 16 3 40 16 50 17 27 4 3 52 3 33 58 62 21 54 30 29 2 38 51 50 22 8 28 34 9 79 32 10 11 59 78 10 68 13 49 35 A 31 48 32 19 26 63 73 23 38 20 3 76 69 72 1 7 12 57 66 47 45 56 60 55
Model Series 12AV/GB2X Ref No. Part Number 1 787-01871 Ref No. Part Number Deck , 21” 35 715-04099 Dowel Pin Description Description 787-01873A Deck, 21” 36 753-06060A Control Lever Assembly 2 941-00019 Bearing Assembly 37 749-04679 Upper Handle 3 710-04995A Screw, 5/16-14 x .750 38 710-0895 Screw, 1/4-15 x .750 4 712-04222 Nut, Sq.
Model Series 12AV/GB2X Ref No. Part Number 72 735-04213A† Lid Seal 73 736-0242† Washer, Bell, .340 x .872 x .080 74 731-09755† Electric Start Housing, LH 75 725-06114† Plunger Switch 76 750-05377† Spacer, .340 x .460 x .
Model Series 12AV/GB2X Page Left Blank Intentionally 13
Model 12AKC31 44 42 43 23 18 16 45 53 39 51 14 15 38 56 4 3 16 17 71 41 72 40 70 37 7 24 6 12 1 A 61 3 46 25 3 3 20 30 35 5 31 22 29 55 52 66 69 29 2 8 49 19 21 68 36 65 21 67 47 13 34 48 63 28 54 27 32 50 38 57 26 58 59 A 60 64 9 54 10 11 64 62 32 33 14 50 62
Model 12AKC31 Ref No. Part Number Ref No. Part Number 1 787-02002A Deck , 21” 37 749-04701A Upper Handle 2 3 631-04501A Bearing Assembly 38 710-0895 Screw, 1/4-15 x .750 710-04995A Screw, 5/16-14 x .750 39 720-0279 Knob 4 712-04222 Nut, Sq., 1/4-20 40 725-0157 Cable Tie 5 749-04608A Lower Handle 41 710-1205 Rope Guide 6 710-04998 Carriage Screw ,5/16-18 42 946-04816 Drive Cable 7 710-04683A Screw, 3/8-16 x 1.
Model Series 12AKD3X 44 42 43 23 18 16 45 53 39 51 14 15 38 56 4 3 16 17 72 41 73 40 71 37 7 24 6 12 1 A 61 3 46 25 3 3 20 30 35 5 31 22 29 52 66 69 29 2 8 49 68 36 65 74 21 34 19 21 28 13 48 63 55 67 47 27 32 50 38 57 26 58 59 A 60 64 9 54 10 11 64 62 32 33 16 50 62
Model Series 12AKD3X Ref No. Part Number 1 787-01992A Ref No. Part Number Deck , 21” 37 749-04701A Upper Handle Description Description 787-02002A Deck, 21” w/ deck wash 38 710-0895 Screw, 1/4-15 x .750 2 631-04501A Bearing Assembly 39 720-0279 Knob 3 710-04995A Screw, 5/16-14 x .750 40 725-0157 Cable Tie 4 712-04222 Nut, Sq.
Engine Model 5X65RU Air Cleaner 117 118 121 Ref.
5X65RU Carburetor 134 134 133 130 f k l 130 j c d e m 127 126 128 b i g 132 131 a h o n p q 129 r s 179 - Carburetor Kit u t v z w y x Ref. Part Number Description Ref.
5X65RU Crankcase 28 36 176 - Gasket Kit - Complete 177 - Gasket Kit -External 44 48 44 43 43 49 50 51 52 53 54 178 - Complete Engine 46 45 47 172 84 89 166 168 83 88 90 167 161 169 166 72 71 81 86 85 64 64 86 80 75 79 48 73 20 82 48 74
5X65RU Crankcase Ref. Part Number Description Ref.
5X65RU Crankshaft & Crankcase Cover 92 91 94 95 44 48 48 99 96 97 100 112 95 175 98 114 110 113 111 112 115 112 112 112 112 112 116 Ref. Description Ref.
5X65RU Flywheel & Shroud 3 1 26 2 2 2 27 6 15 15 18 16 19 19 Ref. Part Number 19 Description 20 25 24 21 Ref. Part Number Description 1 951-14396 Starter Recoil Assembly 19 750-05320 Engine Shroud Spacer 2 712-04290 Starter Acorn Nut 20 951-14442 Carbon Canister Assembly 3 731-07925 Starter Handle 21 951-14126 Carbon Canister 951-14400 Carbon Canister Filter 6 951-11721 Recoil Pulley & Spring Assembly 24 15 951-14397 Starter/Shroud Rear Stud M6×78.
5X65RU Cylinder Head 176 - Gasket Kit - Complete 177 - Gasket Kit -External 121 178 - Complete Engine 154 121 155 173 137 151 OPTIONAL 141 143 149 148 147 146 145 145 48 144 48 48 148 147 146 136 138 142 150 158 136 139 159 158 156 138 141 48 157 136 151 174 24 160 153 64 152 136 135 157 159
5X65RU Cylinder Head Ref. Part Number Description Ref. Part Number Description 48 710-04916 Bolt M6X14 Multi-Purpose 151 710-05094 Muffler Stud M6X95 135 951-14448 Cylinder Head Asm 151 951-10342 Muffler Stud Assembly (Incl.132,133,135,138-143, 152 951-14427 Muffler Gasket 145-149,152,156) 153 951-14428 Choke Temp Control Thermostat Cylinder Head Service Kit 154 951-14429 Muffler Assembly (Incl.
5X65RU Fuel Tank 57 63 64 56 55 58 68 67 69 65 48 70 68 Ref.
Notes 27
Engine Model 6X65RU Air Cleaner 132 134 135 136 Ref.
6X65RU Carburetor 149 149 148 147 145 146 142 143 141 144 Ref. Part Number Description Ref.
6X65RU Crankcase 54 55 56 58 59 60 57 49 52 190 190 99 104 183 98 185 103 105 184 178 186 75 183 76 77 78 96 101 100 50 101 87 30 89 94 95 93 50 54 92 91 54 88 79 97
6X65RU Crankcase Ref. Part Number Description Ref.
6X65RU Crankshaft & Cover 106 107 110 54 115 108 112 113 54 118 114 119 49 129 117 116 126 128 127 49 49 49 49 49 130 49 131 Ref. Description Ref.
6X65RU Flywheel & Shroud 50 51 1 3 2 2 28 49 2 26 53 53 27 15 15 18 16 19 Ref. Part Number 19 19 25 24 Description 21 Ref. 20 Part Number Description 1 951-14396 Recoil Starter Assembly 25 951-14127 Carbon Canister Filter Cap 2 712-04276 Starter Acorn Nut 26 712-04287 Flywheel Nut M14 3 731-07925 Starter Handle 27 751-14722 Flywheel 951-05207 Electric Starter Assembly (53:9) 15 951-14397 Starter/Shroud Rear Stud M6×78.
6X65RU Cylinder Head 136 169 136 170 168 50 167 171 177 174 166 172 151 152 166 175 173 153 151 154 156 156 164 165 158 163 162 54 163 54 54 34 161 160 160 54 151 155 157 162 161 159 150 151 176 175 174 176
6X65RU Cylinder Head Ref. Part Number Description Ref.
6X65RU Fuel Tank 63 69 54 62 61 64 68 71 72 74 72 Ref.
Notes 37
Engine Model 5P71MU Muffler 2 3 1 6 4 Ref. 38 Part Number Description 1 908-04114 Tube Asm-Exh 195 2 908-04117 Muffler Asm-Clmsh 3 908-04119 Cover-Muffler Asm 4 710-05191 Hhflg-M6-1:16 Cl8. 5 921-04420 Gasket-Exhaust 6 738-04473 Screw-Shoulder 9.
5P71MU Carburetor 21 26 22 19 10 20 16 9 13 14 15 4 17 6 5 7 23 18 3 24 11 12 25 1 8 2 8 Ref. Part Number Description Ref. Part Number Description 1 921-04419 Gasket-Manifold 19 15 712-04277 Nut-Sq M5-0.8 2 631-04519P Manifold Asm-Intk 16 710-05282 Screw-Machine M5-8 3 710-05192 Hhflg-M6-1:20:CL5.
5P71MU Crankcase 20 11 8 28 9 19 32 18 7 21 3 22 10 24 33 36 29 6 16 34 26 12 25 30 5 14 31 15 23 4 2 1 35 27 17 40 13 31
5P71MU Crankcase Ref. Part Number Description Ref. Part Number Description 917-04093 Gear Asm-Gov 195 20 710-05293 Screw-Machine M6-1 951-14514 Gov Gear/Shaft Asm 21 911-05431 Shaft-Governor 6.3 951-14513 Gov Arm Asm 22 714-04100 Pin-Cotter 1.
5P71MU Flywheel, Shroud & Tank 15 3 6 7 8 10 9 14 11 4 13 2 1 5 12 Ref. Description Ref. Part Number Description 1 931-04629 Fuel Tank 9 931-08495 Shroud-Engine Reco 2 951-04301 Start Asm-Pull Rec 10 735-04275 Hose-5 Id X 8 Od 951-14508 Pulley/Spring Asm 11 735-05005 Hose-5Mm Id Evap 951-14505 Fuel Line Kit-5P71 3 908-04171 Spacer-Shroud 195 11 4 710-05190 Hhflg-M6-1:12 Cl8.
5P71MU Ignition 5 2 8 4 7 1 3 6 Ref. Part Number Description 1 608-05027 Brake Asm:Flywhl 2 908-04144 Cup-Start 195 3 710-05190 Hhflg-M6-1:12 Cl8.
To order replacement parts or locate your nearest service dealer call a Customer Support at (800) 800-7310. or visit www.mtdproducts.com to find the nearest authorized dealer in your area. MTD LLC, P.O.
