Craftsman 917.378421 Owner's Manual
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Craftsman 917.378421 Owner's Manual

6.75 horsepower 21" rear discharge power propelled rotary lawn mower
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Enlarged version
Owner's Manual
6.75 HORSEPOWER
21" REAR DISCHARGE
POWER PROPELLED
ROTARY LAWN MOWER
Model No.
917,378421
•
Safety
•
Assembly
•
Operation
•
Maintenance
•
EspaSol
•
Repair Parts
CAUTION:
Read and follow all
Safety Rules and Instructions
before operatingthis equipment
Sears, Roebuck and Co., Hoffman Estates, I L 60179
Visit our Cmftsrnan website: www.sears.com/cmflsman

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Summary of Contents for Craftsman 917.378421

  • Page 1 Owner's Manual 6.75 HORSEPOWER 21" REAR DISCHARGE POWER PROPELLED ROTARY LAWN MOWER Model No. 917,378421 • Safety • Assembly • Operation • Maintenance • EspaSol • Repair Parts CAUTION: Read and follow all Safety Rules and Instructions before operatingthis equipment Sears, Roebuck and Co., Hoffman Estates, I L 60179 Visit our Cmftsrnan website: www.sears.com/cmflsman...

  • Page 2: General Operation

    Parts Ordedng ......Back Cover LIMITED TWOYEAR WARRANTY ON CRAFTSMAN POWER MOWER For two years from date of pumhase, when this Craftsman Lawn Mower is maintained, lubdcated, and tuned up according to the operating and maintenance instructionsin the owner's manual, Sears will repair free of charge any defect in matedal or workman- ship.

  • Page 3: Slope Operation

    • Be alert and turn machine off if children • Stop the blade(s) when crossing gravel enter the area. drives, walks, or roads. • Before and while walking backwards, • Stop the engine (motor) whenever you look behind and down for small leave the equipment, before cleaning children.

  • Page 4: Lawn Mower Maintenance

    £WARNING: Engine exhaust, some of its ALook for this symbol to point out constituents, and certain vehicle important safety precautions. It means components contain or emit chemicals CAUTIONI!! BECOME ALERTIII YOUR known to the State of California to cause SAFETY IS INVOLVED. cancer and birth defects or other reproductive harm.

  • Page 5: To Remove Lawn Mower From Carton

    Read t hese instructions andthis manual HOWTO SET UPYOUR LAWN initsentirety before y ou attempt to MOWER assemble or operate your new lawn TO UNFOLD HANDLE mower. IMPORTANT: Unfold handle carefully so IMPORTANT: This lawn mower is as not to pinch or damage control cables. shipped WITHOUT OiL OR GASOLINE in 1.
  • Page 6 KNOWYOUR LAWN MOWER READ THIS OWNER'S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR LAWN MOWER. Compare the illustrationswith your lawn mower to familiarize yourseff with the location of various controls and adjustments. Save this manual for future reference. These symbols may appear on your lawn mower or in literature supplied with the product.
  • Page 7 The operation ofanylawn TO ADJUST CU'rFING HEIGHT mower conresult inforeign Raise wheels for low cut and lower objects thrown i ntothe wheels for high cut, adjust cutting height eyes, which con result in to suit your requirements. Medium severe eye damage. position is best for most lawns.

  • Page 8: To Empty Grass Catcher

    TO EMPTY GRASS CATCHER _WARNING: Experience indicates that alcohol blended fuels (called gasohel or 1. Lift up on grass catcher using the frame handle. using ethanol or methanol) can attract moisture which leads to separation and 2. Remove grass catcher with clippings from under lawn mower handle.

  • Page 9: To Stop Engine

    MULCHING MOWINGTIPS TO STOP ENGINE IMPORTANT: For best performance, • To stop engine, release operator keep mower housing free of built-up presence control bar. NOTE: In cooler weather it may be grass and trash. See =CLEANING" in the Maintenance section of this manual. necessary to repeut priming steps.
  • Page 10 .A,NTE" NCE SC.EDULE " EO E V'OE ERVICE DATES Check for Loose Fasteners Clean/Inspect Grass Catcher (If EquIpped_ ;lean Lawn Mower Clean Under D rive Cover <Power-Propelled Mowers) l# / Check d rive ulleys Power.p ropel_]PMowe rs) ChecldSharpen/Replace Blade Lubrication Chart Clean Batteri/Rechar E Check Engine 011Lever Change Engine Oil...
  • Page 11 PRODUCT SPECIFICATIONS SERIALNUMBER: DATE O F PURCHASE: 3ASOLINE CAPACITY/TYPE: 1,5 QUARTS UNLEADED REGULAR DILTYPE (API-SF-SJ): SAE 30 (ABOVE 32°F); SAE 5W-30 (BELOW 32°F OIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .045") CHAMPION RESISTOR TYPE RJ19LM4 BLADE BOLTTORQUE: 35-40 FT. LBS. •...

  • Page 12: To Sharpen Blade

    GEAR CASE TO SHARPEN BLADE NOTE: We do not recommend sharpen- • To keep your drive system working ing blade - but if you do, be sure the properly, the gear case and area blade is balanced. around the drive should be kept clean Care should be taken to keep the blade and free of trash build-up.
  • Page 13 Collar TO CHANGE ENGINE OIL Turn clockwise NOTE: Before tipping lawn mower to Clip drain oil, drain fuel tank by running engine until fuel tank is empty. 1. Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug.

  • Page 14: Rear Deflector

    TO ADJUST HANDLE _,CAUTION: Before performing any service or adjustments: The upper handle may be adjusted to 1. Release control bar and stop engine. four (4) different height positions. 2. Make sure the blade and all moving 1, Loosen both handle knobs only parts have completely stopped.

  • Page 15: To Assemble Grass Catcher

    TO ASSEMBLE GRASS CATCHER ENGINE ENGINE SPEED 1. Put grass catcher frame i_o grass bag with rigidpart of bag on the bottom. Your engine speed has been factory set. Make sure the frame handle is outside Do not attempt to increase engine speed of the bag top.

  • Page 16: Engine Oil

    Also, experience indicates that alcohol HANDLE blended fuels (called gasohol or using You can fold your lawn mower handle for ethanol or methanol) can attract moisture storage. which leads to separation and formation 1. Squeeze the bottom ends of the lower of acids dudng storage.
  • Page 17 ROUBLESHOOTING CHART CORRECTION PROBLEM CAUSE Does not start 1. Dirty air filter. 1. Clean/replace air filter. 2. Fill fuel tank. 2. Out of fuel. 3. Drain tank and refill with 3. Stale fuel, fresh clean fuel. 4. Drain fuel tank and 4.

  • Page 18: Troubleshooting Chart

    TROUBLESHOOTING CHART PROBLEM CAUSE CORRECTION Grass c atcher 1. Cutting height toolow. 1. Raise c utting h eight. notflnlng ( ifso 2. Uitonblade worn off. 2. Replace blade, equipped) 3. Catcher not v enting a ir, 3, Clean grass catcher, Hard to push 1.
  • Page 19 GARANT(A LIMITADA DE DOS _S PARA LA SEGADORA A MOTOR CRAFTSMAN Pot dos (2) anos, a parUr de la _echa de compra, cuando esta Segadom Craftsman se mantanga, lubdque y aline segOn las instrucciones pare la opemci6n y el mantenimian_o en el manual del due5o, Sears reparar_ gratis todo dalecto en el material y la mano de dora.
  • Page 20 • Nunoa perrnita que los niRos operen la • Nunca opere la maquina cuando la hierba mdquina. estd mojada. AsegOrese siempre de tenar • Tenga un cuidado exlm cuando se acarqos buena tracci6n ensus pies; mantenga el a esquinas donde no hay visibilidad, a los mango finnementa y camine;...

  • Page 21: Mantenimiento

    A_DVERTENCIA: Los bernes, terminaJesy A_sque esle s_lo ope sepia las pr_vdo- aocesoriosndativosde la I_terla contienenIt_no nes de seguridadde ]ml_landa. Otiere dedr - o compueslos de ptomo,pmductosqui_ IIIATENOI_)N!!! IIIESTE ALERTO!!! SU ccnocidosen el Es_adode Californiacomo causa SEGURIDAD ESTA COMPROMETIDA. de cdncer y defectos al nacirr_entou ¢fa'os reproductvos.Lavar las manos de.spuds de _=PRECAUC_.N: Siempre desconecte el manlpulados.
  • Page 22 COMO PREPARAR SU SEGADORA Lea estas instrucciones y el manual completamente a_es de tratar de rnontar u PARA DI=SDOBLAR EL MANGO opera# su segadora nueva. IMPORTANTE: Despliegue el mango con IMPORTANTIE: ESTE CORTACESPED VtENE mucho cuidade pare no pellizcar o daRar los SIN ACEITE O GASOLINA EN EL MOTOR.
  • Page 23 FAMILIARICESE CON SU SEGADORA LEA ESTE MANUAL DEL DUEllO Y LAS REGLAS DE SEGURIDAD ANTES DE OPERAR SU SEGADORA. Compare las ilustraciones con su segadora para familiarizarse con la ubicacVande los diversos controles y ajustes. Guarde esta manual para referencia en el futuro. Estos sfmbolos pueden aparoser sobre su segadora o en ta literatura proporclonada el producto.
  • Page 24 PARA AJUSTAR LA ALTURA opemclbn de cualquier segadora puede hacer que CORTE salten objetos exlraRos denim Levante tas ruedas para el code bajo y baje de sus ojos, Io que puede las ruedas para el corte alto., ajuste la altura producir dahos graves en dstos.
  • Page 25 PARA V ACIAR E LRECOGEDOR AGREGUE GASOLINA ClaSPED • Llene el estanque de combustible. Use 1. Levante elrecogedor dec6sped usando el gasolina regular, sin plomo, nueva y limpia mango del b astidor. con el mfnimo de 87 octanos. (El uso de 2.
  • Page 26 PARA HACER ARRANCAR EL MOTOR • Mantenga la parts supedor del motor, atrededer del armncador, despejeda y sin NOTA; Dabide alas capes pmtectoras del recortes de cdsped y paja. Esto ayudar_ el motor, una cantidad pequeSa de humo puede ltujo del airs del motor y extender_ su ester presente durante el uso inicial del duracibn.
  • Page 27 PROGRAMADE MANTENIMIENTO LLENE LAS FECHAS A MEDIDA QUECOMPLETE SUSERVICIO REQULAR FECHAS DESERVICIO Rev]sar sl hay sujetadoms sue_tos " " Llmpiadt nspeccionar el recogedor de c6_(=_ equ_eo) V ° Llmpiarla segadera k_r d ebaJo d elacublerta d ela tnms- mLm_ln (=,g_as con poder p_u_or) Revi_mr IM con-eas y ]as pote_s skT, pot- Revisar o/afllar/_m_ar la cuchlna...
  • Page 28 ESPECIRCACIONES PRODUCTO _IOMERO DE SERtE: =ECHA DE COMPRA: _,APACIDADYT]PO DE GASOLINA: 1.5 CUARTOS REGULAR SIN PLOMO TIPO DE ACEITE IAPI-SF-SJ): SAE 30 (SOBRE 32°F); SAE 5W-30 (DEBAJO 32_F) 3APACIDAD DE ACEITE: 20 OZ. DE CAFACIDAD BUJ[A (ABERTU RA: .045") CHAMPION FU19{M4 FORSI(_N DEL PERNO DE LA CUCHILIJ_ 35-40 F_ LBS.

  • Page 29: Caja De Engranajes

    CAJA DE ENGRANAJES PARA AFILAR LA CUCHILLA • Para rnantener el sistema de impulsi_'_ AVISO: No recornendamos et afllar la cuchilla funcionando en forma adecuada, la caja de - pare si Io hace, aseg0rese de que quede engranajes y el Area alrededor de la balanceade.
  • Page 30 Gire en el sentldo a 1as manillas del Colar PAPA CAMBtAR EL ACEITE DIZL MOTOR relcj para AVISO: Antes de inclinar la segadora pare roar drenar el aceite, drene el tanque de combus- tible haciendo cotter el motor hasta qua el tanque est6 vacio.
  • Page 31 PARA AJUSTAR EL MANGO _I,PRECAUCl6N: Antes de dar calquier [] mango superior quede ser ajustado a sewico o de hacer ajustes: cuatro (4) dislJntaspoelciones de a;lum. 1. Suelte la barra de conltol y pare el motor. 1. AtloJeambas pedllas del mango solamente 2.
  • Page 32 MOTOR del carburader, Ileve su segadom a contacto con su centro de servicio Sears o con un otro VELOCIDAD DEL MOTOR centro de servicio cualificado para reparade y/ La velocidad del motor ha side ajustada en la o ajustade. f_tbrica. No tmte de aumentar la velocidad del IMPORTANTE: Nunca manipule el regulador motor pues se pueden producir lesiones...
  • Page 33 ACEITE DEL MOTOR MOTOR Drene el aceite (con el motor celiente) y SISTEMA DE COMBUSTIBLE c_mblelo con aceite de motor Umpio. (Vea IMPORTANTE: Es importante evitar qua se =MOTOR" an la secci6n de Mantenimiento de formen depbsitos de goma en partes este manual.) fundarnentaJes del elstema de combustible tales como el carburador, el filtm del combus-...
  • Page 34 IDENTIFICACI(_N DEPROBLEMAS CORRECCION PROBLEMA CAUSA =alta de fuerza 1. Cuchilla desgastada, doblada 1. Ajuste a la posicibn de =Code mds alto." 0 suelta. 2. Altura de las ruedas dispareja. 2. Ajuste a la posioibn de =Code m_s alto." 3. Velocidad del motor lenta. 3.
  • Page 35 CRAFTSMAN ROTARY L AWN MOWER- - MODEL NU MBER 917.378421 GEAR CASE ASSEMBLY- - PART NUMBER 175258 PART KEY PART DESCRIPTION DESCRIPTION 17490416 Tapping Screw 1/4-20x 1-1/4 700343 Bushing t75248X(_4 Engagement Bracket 86447 Ptug Shifter 137050 HellcaJGear 57O72 SeaJ 750436X...
  • Page 36 CRAFTSMAN ROTARY L AWN MOWER - - MODEL NUMBER91?,378421...
  • Page 37 CRAFTSMAN ROTARY LAWN MOWER- - MODEL NUMBER 917.378421 PART PART DESCRIPTION DESCRIPTION 1753OLX479 Upper Handle 175653X004 Setector Spdng 151721X479 Lower Handle 63124 Nut 5/16-18 169780 CordrolBar 175575X004 Axle Arm Assembly LR 156577 Engine Zone Control Cable 177"321 Hubcap 171407 HandieBoft...
  • Page 39 CRAFTSMAN ROTARY LAWN MOWER- - MODEL NUMBER 917.378421 PART PART DF_C_P_ON DESCRIPTIQN DfiveCover 145755 Con_ol Cable Assembly 175065 75t152 Locknut #10-24 132010 Hex Flange Nut 158755 HeX Washer Head Screw 1/4-2g x 2,12 137052 Drive Pulley 1"/5436 V-Belt 151521 Wheel Adjuster Assembly (Left)
  • Page 40 MODEL NUMBER 143.016728 CRAFTSMAN 4-CYCLE ENGINE ,39O ,285 275,...
  • Page 41 MODEL NUMBER 143.016728 CRAFTSMAN 4-CYCLE ENGINE KLm£p_RT PART NO. NO. DESCRIP11ON NO. NO, DESCRIPIX)N 37465 Cylinder (includes Key #2 and 20) 29752 Nut & Lock Washer, 1/4-28 26727 DowelPIn 6201 Screw, 1/4-28 x 7/8" BreatherElement 26756 " CarburetorTolntakepipeGesket 33734 36557 Breather Ass_/.
  • Page 42 CRAFTSMAN 4-CYCLE ENGINE MODEL NUMBER 143.016728 J;_..,-rt ?--=, PARr DESCRIP13ON 640271 Carburetor (Includes 184 of Engine Parts List) °. 31615 Throttle Shaft & Lever Assembty 31767 Throttle Retum Spring 631184 * DustSealWasher 631183 * DuotSe_l(]_rottle) 640070 Throttle Shutter 650506 * ShutterScrew...
  • Page 43 CRAFTSMAN 4-CYCLE ENGINE MODEL NUMBER 143.016728 DIESCRIPI10N 5907_ Recoil Starter 590599A Spdng Pin (Includes Key Number 4) PARr 590600 Washer 590696 Retainer 590601 Wa.sher ,--_ _--' 590697 Brake Spdng 59(_8 Starter Dog 590700 Pulley & Rew;ncl Spdng Assembly 5906_ DogSprlng...
  • Page 44 Forrepairof majorbrandappliances In your own home... no matterwho made it,no matterwho soldit] 1.8OO-4-MY-HOME _ An,/*n_ _ay_ ri_t (l-ax)._a) (u.s_.and Canal) Www.li_,,p_xn www._ea_.ca Forrepairofcarry-inproducts likevacuums,lawnequipment, a nd eleclmnics, c anfor the nearestSears Pads and Repair Center. 1-800-488-1222 ,_-_=ne, day ornig_ (U.S J_od,A 'A,_t.sears.cofn Forthe replacement parts,accessories andowners manuals thatyouneed to do-it-yourealf, callSears PartsDirect_t...

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