The 12 HP 300421 B&S Engine
  This is the engine used on the B12, B112, B212, 2012, 3012, tractors.  It is a cast iron single cylinder engine.
  Common Parts: 298060 Condensor 26018 Spring Breaker Arm
 
  
   23 298975 Flywheel-Magneto     1     74 93521 Screw,screen Mtg     1     85 91386 Screw, Hex Head Cap (2" Long)     1     90 299551 Carburetor Assembly (Not available-Use Part No. 391070)     1     91 299687 Body Assy.-Upper Carburetor     1     92 299357 Body-Upper Carburetor     1     93 23108 Bushing-Throttle Shaft     1     94 292681 Valve-Idle Mixture Included in Carburetor Overhaul Kit-Part No. 299720   1 10   95 93038 Screw-Throttle Valve Mounting Sem     1     96 221939 Valve-Throttle     1     97 298535 Shaft-Throttle     1     98 91920 Screw, Machine Fill (8-32 X 5/8")     1     99 26157 Spring, Compression     1     100 61967 Stop-Throttle Lever     1     101 93043 Pin-Throttle Stop And Governor Shaft     1     102 270268 Gasket-Carburetor Body Included in Carburetor Overhaul Kit-Part No. 299720   1     103 298514 Float-Carburetor     1     104 230896 Pin-Hinge Included in Carburetor Overhaul Kit-Part No. 299720   1     105 299096 Valve-Fuel Inlet Included in Carburetor Overhaul Kit-Part No. 299720   1     107 391069 Body Assy.-Lower Carburetor     1     108 298730 Valve-Choke     1     109 298622 Shaft-Choke     1     110 62899 Washer-Thermostat     1     112 23123 Screw-Shoulder     1     113 299518 Nozzle-Carburetor Included in Carburetor Overhaul Kit-Part No. 299720   1     114 68667 Washer, Fiber (Viton Seat) Included in Carburetor Overhaul Kit-Part No. 299720   1     118 99525 Valve-Needle Included in Carburetor Overhaul Kit-Part No. 299720   1     119 90746 Screw, Machine Fill (10-32 X 5/8")     1     120 92290 Lockwasher, Zinc Pl     1     121 299720 Carburetor Overhaul Kit     1 10   127 221747 Plug-Welch Included in Carburetor Overhaul Kit-Part No. 299720   1     158 27590 Filter-Carburetor Drin     1 10   159 220521 Retainer-Carb Drain     1 10   165 62199 Washer, Steel     1     166 230840 Stud-Air Cleaner     1     169 90832 Washer-Lock     1     171 92129 Nut, Hex Mach (1/4-28)     1     180 291488 Tank-Fuel (Metal)     1     181 69221 Cap-Fuel Tank Metal (1-3/4" O.d. Top)     1     182 22813 Bracket, Tank (8 Quart) (Remote Mount Only)     1     183 291490 Strap, Tank Assy (6 Quart)     1     184 91257 Screw, Machine Fill (1/4-20 X 1-1/2")     1     185 90970 Nut, Square (1/4-20)     1     186 67218 Connector, Fuel     1     187 296004 Line-Fuel (23" Cut To Length)     1     189 90366 Lockwasher, Zinc Pl     1     196 22907 Support, Tank (8 Quart) (Remote Mount Only)     1     240 295984 Carburetor (Used With Flexible Fuel Pipe)     1     241 296005 Fuel Filter Cover     1     242 295913 Valve-Shut     1     243 22547 Screen-Fuel Filter     1     244 230318 Connector, Fuel     1     245 68477 Gasket-Fuel Filter Bowl Included in Gasket Set-Part No. 299719   1     246 298683 Bowl-Fuel Filter     1 10   247 99665 Yoke-Fuel Filter     1     257 22372 Clamp-Casing     1     257 93107 Screw-Slotted     1 10   257 93543 Screw, Sem Hex Head (10-32 X 3/8")     1     266 299361 Control-Throttle (Disc Type)     1 10   268 65616 Casing, Wire (72", Cut To Required Length) If longer casing is required, specify length in inches; if shorter casing is needed, order No. 65616 and cut to required length.   1     269 26633 Wire, Control (78" Cut To Required Length) If longer wire is required, specify length in inches; if shorter wire is needed, order No. 26633 and cut to required length   1     270 63426 Nut, Hex     1     271 290568 Lever-Control     1     304 294698 Housing-Blower     1     305 93158 Screw, Sem Hex Head (1/4-20 X 5/8")     1     321 211555 Fan-Booster     1     324 221851 Screen-Rotating     1     332 230674 Nut-Hex.     1     333 298968 Armature-Mag (For Breaker Ignition)     1 6   334 93381 Screw, Machine Hex     1     339 298185 Breaker-Ignition     1 10   340 26018 Spring-Breaker Arm     1 10   342 298125 Plunger-Contact     1     343 298060 Condenser     1     345 211327 Cover-Breaker     1 10   346 93400 Screw-Slotted     1     348 221976 Switch-Stop     1 10   353 92791 Lockwasher, Interna     1     354 90576 Nut, Hex (8-32)     1     356 295413 Wire-Ground     1     363 19068 Puller-Flywheel (Optional Accessory)     1     451 90364 Lockwasher, Zinc Pl     1     506 90072 Screw-Slotted (8-32 X 5/8")     1 10   507 66895 Insulator-Terminal     1 10   518 69932 Rope/Grip Assy (55")     1     535 270093 Filter-Air     1     536 299709 Cleaner-Air     1     564 92980 Screw, Hex Head Cap (1/4-20 X 1/2")     1     573 299450 Plate-Back     1     586 22906 Retainer     1     587 220509 Clip-Wire     1     588 211440 Bracket-Armature Mtg.     1     589 93473 Screw-Slotted     1     590 93171 Screw-Slotted Hex.     1     601 93053 Clamp, Hose (Green)     1     636 92864 Washer-Lock     1 10   637 66154 Washer-Fiber     1     638 26404 Washer-Flat     1     639 270176 Gasket-Breaker Cover Included in Gasket Set-Part No. 299719   1     640 298141 Lead-Primary     1     642 221468 Cover-Air Cleaner     1     643 280001 Spacer-Air Cleaner     1 6   644 221755 Base-Air Cleaner     1     654 230783 Nut-Lock     1     670 230900 Spacer, Mounting (2)     1     722 68768 Seal-Plunger     1     723 93516 Retainer-Seal     1 10   724 221873 Retainer-Seal     1     736 93542 Nut-Hex.     1     737 93546 Screw, Hex Head Cap (5/16-18 X 1-1/4")     1     810 230950 Shaft-Stud     1   
 
  
 
   1 391096 Cylinder Assembly     1     5 211889 Head-Cylinder     1     6 22963 Washer, Flat     1     7 270400 Gasket-Cylinder Head Included in Gasket Set-Part No. 299719   1     8 299328 Breather     1     9 27803 Gasket-Valve Cover Included in Gasket Set-Part No. 299719   1     10 93394 Screw     1     11 68818 Tube-Breather     1     12 270448 Gasket-Cover (P.t.o Side) Included in Gasket Set-Part No. 299719   1     14 22963 Washer, Flat     1     14 92674 Screw, Hex Head Cap (2-7/16" Long)     1     14 93211 Screw, Machine Hex (5/16-18 X 2-21/32")     1     16 261218 Crankshaft     1     17 291667 Bearing, Ball     1     20 299609 Seal-Oil     1     21 66768 Plug, Oil Fill     1     24 61760 Key, Flywheel (For Breaker Ignition System)     1     25 299688 Piston Assy-Std     1 6   25 299716 Piston Assy. .010" O.S.     1 6   25 299717 Piston Assy. .020" O.S.     1 6   25 299718 Piston Assy. .030" O.S.     1 6   26 299690 Ring Set-Piston Standard Consists of: 211602 Ring-Piston, Comp., Top, Standard 211603 Ring-Piston, Comp., Center, Standard 299689 Ring-Piston, Oil, Standard (w/expander)   1 5   26 299710 Ring Set-Piston .010" O.S. Consists of: 211694 Ring-Piston, Comp., Top, .010" O.S. 211695 Ring-Piston, Comp., Center, .010" O.S. 299713 Ring-Piston, Oil, .010" O.S. (w/expander)   1 10   26 299711 Ring Set-Piston .020" O.S. Consists of: 211698 Ring-Piston, Comp., Top, .020" O.S. 211699 Ring-Piston, Comp., Center, .020" O.S. 299714 Ring-Piston, Oil, .020" O.S. (w/expander)   1 5   26 299712 Ring Set-Piston .030" O.S. Consists of: 211702 Ring-Piston, Comp., Top, .030" O.S. 211703 Ring-Piston, Comp., Center, .030" O.S. 299715 Ring-Piston, Oil, .030" O.S. (w/expander)   1     26 299745 For Chrome Piston Ring Set Standard Size     1 10   27 260924 Lock-Piston Pin     1     28 299691 Pin-Piston Std (Std.)     1 10   29 299632 Rod-Connecting For Connecting Rod with .020" undersize Crankpin Bore-order No. 390306   1     30 221777 Dipper-Connecting Rod     1     31 221776 Lock-Rod Screw     1     32 230907 Screw-Connecting Rod     1     33 261207 Valve-Exhaust     1     34 230861 Valve-Intake Used Before Code Date 7004171   1     34 261206 Valve-Intake Used After Code Date 7004161   1     35 26828 Spring, Valve (Exhaust)     1     36 26828 Spring, Valve (Exhaust)     1     40 292260 Rotocoil Assy (Exhaust Valve)     1     41 68283 Collar-Valve Spring Retainer     1 10   45 26670 Tappet-Valve     1     46 211794 Gear-Cam     1     50 211419 Manifold-Intake     1     52 27381 Gasket, Intake Elbo Included in Gasket Set-Part No. 299719   1     88 270449 Gasket-Gear Case Cover     1     123 93415 Screw-Hex (1/4-20 X 3/4)     1     201 26725 Link-Throttle     1     204 23849 Collar-Bell Crank     1     206 93422 Locknut, Hex     1     208 230040 Rod-Governor Control     1     209A 260816 Spring, Governor (2 1/2" Long)     1     209 260815 Spring-Governor     1     219 291192 Gear-Governor     1     223 22814 Lever-Governor Control     1     225 291177 Shaft-Governor Gear     1     227 298399 Lever-Governor     1     230 22826 Washer-Spacer     1     300 299477 Muffler Assy Muffler is furnished by the equipment manufacturer   1     302 91310 Locknut-Muffler     1     303 91308 Elbow, Exhaust 90 D (1" Street)     1     306 299536 Shield-Cylinder     1     308 221953 Cover-Cylinder Head     1     329 93294 Screw, Sem (5/8" Long)     1     329 93415 Screw-Hex (1/4-20 X 3/4)     1     337 298809 Spark Plug For Ignition Cable Terminal order No. 221798   1     347 220197 Switch, Stop (For 1-1/2" High, 38 Mm. Spark Plugs)     1     357 91540 Key, Pulley (1/4")     1     358 299719 Gasket Set     1     523 299385 Cap And Dipstick-Oil Filler     1     524 68838 Seal-Oil Filler Tube To Sump     1     525 299381 Pipe-Oil Filler     1     552 23837 Bushing-Governor Crank     1     553 62222 Seat-Valve Spring     1     556 90887 Screw, Hex Head Cap (3/8-16 X 1-1/4")     1     558 92268 Washer-Lock (3/8 X 1/8 X 3/32")     1 10   560 91984 Pin-Cotter 1/16 X 1/2" Long     1     562 92613 Bolt-Gov Lever     1 10   567 291364 Crank-Governor     1 10   568 298398 Base Assy.-Engine     1     569 27351 Gasket-Engine Base Included in Gasket Set-Part No. 299719   1     570 299459 Support Assy.-Bearing (P.t.o. Side)     1     571 299705 Support-Bearing (Mag. Side)     1     572 291871 Guide-Front Air     1     587 220509 Clip-Wire     1     590 93171 Screw-Slotted Hex.     1     592 90356 Nut, Hex Mach (10-24)     1     593 270513 Gasket-Brg Sup (.015" Thick) Included in Gasket Set-Part No. 299719   1     593 270514 Gasket-Brg Sup (.010" Thick) Included in Gasket Set-Part No. 299719   1     593 270515 Gasket-Brg Sup (.005" Thick) Included in Gasket Set-Part No. 299719   1     635 66538 Elbow-Spark Plug     1     645 230775 Bushing-Plunger     1     664 93415 Screw-Hex (1/4-20 X 3/4)     1     738 221944 Washer-Flat     1     739 93535 Screw, Sem Hex Head (5/16-18 X 3/4)     1     740 221990 Washer-Flat     1     741 299472 Gear Assembly-Idler     1     742 93525 Retainer-E Ring     1     743 211605 Gear-Drive     1     744 93526 Washer, Belleville     1     745 93562 Screw-Drive Gear Mounting     1     746 211631 Gear-Drive (Mag. Side)     1     747 299732 Cover Assembly-P.t.o. Side     1     748 93585 Screw, Sem Hex Head     1     749 299731 Cover Assembly-Mag. Side     1     750 93587 Screw, Sem Hex Head (1/4-20 X 1")     1     751 22355 Washer-Seal     1     752 93554 Screw-Plug     1     753 230892 Shaft-Cam Gear     1 10   754 93528 Screw-Hex.     1     755 299706 Bearing-Gear     1 10 
 
 
 
 
  
   169 90832 Washer-Lock     1     188 92271 Screw-Cap, Hex Hd. (5/16-18 X 1")     1     188 93535 Screw, Sem Hex Head (5/16-18 X 3/4)     1     189 90366 Lockwasher, Zinc Pl     1     192 91397 Nut, Hex (5/16-18)     1     305 93158 Screw, Sem Hex Head (1/4-20 X 5/8")     1     323A 68898 Belt-Vee (For Low Position Mtg.)     1     323 68878 Belt-Vee (For High Position Mtg.)     1     328 222062 Guard-Belt     1     478 221745 Panel-Instrument     1     492 297779 Starter-Gen (Delco-Remy #1101864 & Pulley-Delco-Remy #1949358)   1     493A 211169 Bracket-Starter     1     493 211617 Bracket-Upper Starter Used Before Code Date 6804201   1     493 211785 Bracket-Upper Starter Used After Code Date 6804191   1     500 91325 Washer-Plain     1     501A 295924 Regulator (Flat Mount, Delco-remy)     1     501 297196 Regulator (Saddle Mount, Delco-remy)     1     558 92268 Washer-Lock (3/8 X 1/8 X 3/32")     1 10   561 92278 Nut, Hex (1/4-20)     1     565 93142 Screw-Hex     1     574 295158 Ammeter     1 10   575 299139 Switch, Starter Grp     1     576A 295160 Wire/Ammeter     1     576 298579 Wire Assembly (Ignition Switch to Indicator Lamp)   1     577A 295161 Wire/Ammeter (Ammeter To Regulator)     1     577 298582 Wire Assembly (Starter Switch to Ign Switch & Bat on Regulator)   1     578A 295162 Wire/Switch     1     578 298583 Wire Assembly (To Generator Term, Regulator & Indicator Light Term)   1     605A 297171 Bracket-Support (Lower)     1     606A 221442 Strap-Adjusting     1     606 221931 Strap-Adjusting     1     646A 221472 Bracket-Support     1 10   646 221932 Bracket/Starter     1     647 211170 Link-Anchor     1     648 91439 Screw-Cap, Hex. Head 1/4-20 X 3/8"     1     649 93546 Screw, Hex Head Cap (5/16-18 X 1-1/4")     1     650 91814 Screw-Hex (3/8-16 X 2")     1     651 92034 Screw-Hex (5/16-18 X 1/2")     1     652 91162 Screw, Hex Head Cap (5/16-18 X 1-1/2")     1     653 91442 Screw-Pulley Mtg.     1     661 91203 Screw, Hex Head Cap (5/16-18 X 1-3/4")     1     664 93415 Screw-Hex (1/4-20 X 3/4)     1     669 222067 Bracket-Guard     1     694 91324 Washer     1     737 93546 Screw, Hex Head Cap (5/16-18 X 1-1/4")     1     762 390048 Starter Kit-Elec 12 Volt     1     795 298590 Switch-Toggle     1     805 93593 Clip-Nut (Belt Guard Brkt Mtg)     1     824 298586 Holder-Lamp     1     825 67245 Lamp-Chrg Indicator (#1893 T3-1/4 Bulb, Miniature Bayonet Base, 12V)   1     826 298580 Wire Assembly (Ignition Switch To Ground)     1     827 298581 Wire-Ignition Switch To Ground     1     840 298561 Panel Kit     1     841 297197 Clamp-Regulator To Generator     1   
 
 
  
 
  
 
  
 
  
 
  
 
 
  
  Note: The 295924 Regulator (Flat Mount, Delco-remy) is crossreferenced to model 1118988 Delco-Remy.
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