Craftsman 917.378420 Owner's Manual
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Craftsman 917.378420 Owner's Manual

6.75 horsepower 21" rear discharge power propelled rotary lawn mower
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Enlarged version
Owner's Manual
JCRHFTSMIIWJ
6.75 HORSEPOWER
21" REAR DISCHARGE
POWER PROPELLED
ROTARY LAWN MOWER
Model No.
917.378420
•
Safety
•
Assembly
•
Operation
•
Maintenance
•
EspaSol
•
Repair Parts
CAUTION:
Read and follow all
Safety Rules and Instructions
before operating this equipment
Sears, Roebuck
and Co., Hoffman
Estates, IL 60179
Visit our Craftsman
website: www.sears.com/craftsman

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June 15, 2025

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Summary of Contents for Craftsman 917.378420

  • Page 1 917.378420 • Safety • Assembly • Operation • Maintenance • EspaSol • Repair Parts CAUTION: Read and follow all Safety Rules and Instructions before operating this equipment Sears, Roebuck and Co., Hoffman Estates, IL 60179 Visit our Craftsman website: www.sears.com/craftsman...
  • Page 2 Parts Ordering ..... Back Cover LIMITED TWO YEAR WARRANTY ON CRAFTSMAN POWER MOWER For two years from date of purchase, when this Craftsman Lawn Mower is maintained, lubricated, and tuned up according to the operating and maintenance instructions the owner's manual, Sears will repair free of charge any defect in material or workman- ship.
  • Page 3 • Be alert and turn machine off if children • Stop the blade(s) when crossing gravel enter the area. drives, walks, or roads. • Stop the engine (motor) whenever you • Before and while walking backwards, look behind and down for small leave the equipment, before cleaning children.
  • Page 4 _Lookforthissymbol topoint o ut ,_.WARNING: Engine exhaust, some of its important safety p recautions. Itmeans constituents, and certain vehicle CAUTION!!! BECOMEALERT!!! YOUR components contain or emit chemicals SAFETY I SINVOLVED. known to the State of California to cause cancer and birth defects or other A CAUTION: Inorder t oprevent accidental starting w hen setting up, reproductive...
  • Page 5 Read these instructions and this manual HOWTO SET UPYOUR LAWN in its entirety before you 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 illustrations with your lawn mower to familiarize yourself 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 Theoperation ofany TO CONVERT MOWER lawn mower can result in Your lawn mower was shipped ready to be foreign objects thrown into used as a mulcher. To convert to bagging : the eyes, which can result REAR BAGGING in severe eye damage. •...
  • Page 8 DRIVE CONTROL _WARNING: Experience indicates that alcohol blended fuels (called gasohol or • Self-propelling is controlled by holding using ethanol or methanol) can attract the operator presence control bar down moisture which leads to separation to the handle and pushing the drive control lever forward until it clicks;...
  • Page 9 MOWINGTIPS MULCHING MOWINGTIPS • Under certain conditions, such as very IMPORTANT: For best performance, tall grass, it may be necessary to raise keep mower housing free of built-up the height of cut to reduce pushing grass and trash. See "Cleaning" in Maintenance section of this manual.
  • Page 10 F,LL, MAINTENANCE SCHEDULE _ o_ AS YOU COMPLETE .EOULA. SE"VlCE TS "VIOE OA'ES Check for Loose Fasteners Clean/inspect Grass Catcher (If Equipped) C_ean Lawn Mower (Power-Propelled Mowers) ¥# Clean Under Drive Cover Check drive beIVpulleys (Power-Propelled Mowers) Check/SharpenlReplace Blade It_ 3 Lubrication Chart Clean Battery/Recharroe Electric Start Mowers'_...
  • Page 11 PRODUCT SPECIFICATIONS SERtALNUMBER lATE OF PURCHASE ,ASOLINE CAPACITY/TYPE: 1.5 QUARTS UNLEADED REGULAR OILTYPE (API°SF-SJ): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20OZS. SPARK PLUG (GAP: .045") CHAMPION RESISTOR TYPE RJ19LM4 BLADE BOLT TORQUE: 35-40 FT. LBS. The model and serial numbers will be found on a decal attached to the rear of the lawn mower housing.Record both serial number and date of purchase in space provided above.
  • Page 12 ENGINE Blade adapter Crankshaft LUBRICATION KeY..._F-. / keyway Use only high quality detergent oil rated Lockwasher -" with API service classification SF-SJ. Select the oil's SAE viscosity grade Blade '_'_ ' according to your expected operating temperature. _--_a Crank SA£ VISCOSITY GRAOE8 Blade ", --_'_...
  • Page 13 FILTER SPARK PLUG Your engine will not run properly and may Change your spark plug each year to be damaged by using a dirty air filter. make your engine start easier and run Replace the air filter every year, more better.
  • Page 14 TO ADJUST HANDLE Catcher The upper handle may be adjusted to frame four (4) different height positions. 1. Loosen both handle knobs only enough to allow the upper handle to pivot to the desired adjustment position. 2. Tighten both handle knobs securely. Frame opening ENGINE...
  • Page 15 • Never use engine or carburetor cleaner • When setting up your handle from the products in the fuel tank or permanent storage position, the lower handle will automatically lock into the mowing damage may occur. • Use fresh fuel next season. position.
  • Page 16 TROUBLESHOOTING CHART PROBLEM CAUSE CORRECTION Does not start 1. Dirtyair filter. 1. Clean/replace air filter. 2. Out of fuel. 2. Fill fuel tank. 3. Stale fuel. 3. Drain tank and refill with fresh clean fuel. 4. Water in fuel. 4, Drain fuel tank and carburetor and refill tank with fresh gasoline.
  • Page 17 'ROUBLESHOOTING CHART PROBLEM CAUSE CORRECTION Grass catcher 1. Cutting height too low. 1. Raise cutting height. notfilling(ifso 2. Lift on blade worn off. 2. Replace blade. equipped) 3. Catcher not venting air. 3. Clean grass catcher. Hard to push 1. Grass is too high or wheel 1.
  • Page 18 LIMITADA DE DOS AltOS PARA LA SEGADORA A MOTOR CRAFTSMAN Por doe (2) aSos, a partir de la fecha de compra, cuando esta Segadora Craftsman mantenga, lubrique y afine eegL_n las instrucciones para la operaci6n y el mantenimiento en el manual del dueSo, Sears reparar&...
  • Page 19 • Nunca opere la maquina cuando la hierba • Nunca permita que los ni_os operen la este mojada. Asegdrese siempre de tener maquina. buena traccidn en sus pies; mantenga el • Tenga un cuidado extra cuando se acerque mango firmemente y camine;...
  • Page 20 _SADVE RTENCIA: El lubo de escape del motor, _kBusque este sfmbolo que se_ala las precaucio- algunos de sus constituyentes y algunos nes de seguridad de importancia. Quiere decir - componentes del vehiculo contienen o iiiATENClON!H iiiESTE ALERTO!!! SU SEGURIDAD ESTA COMPROMETIDA. desprenden productos qu_micosconocidos en el Estado de California como causa de cancer y _PRECAUCI(_N:...
  • Page 21 COMO PREPARAR SU SEGADORA Lea estas instrucciones y el manual completamente antes de tratar de montar u PARA DESDOBLAR EL MANGO operar su segadora nueva. IMPORTANTE: Despliegue el mango con IMPORTANTE: ESTE CORTACESPED VIENE mucho cuidado para no pellizcar o da5ar los SiN ACEITE O GASOLINA EN EL MOTOR.
  • Page 22 FAMILIARICESE SU SEGADORA LEA ESTE MANUAL DEL DUEi_IO Y LAS REGLAS DE SEGURIDAD ANTES DE OPERAR SEGADORA. Compare las ilustraciones con su segadora para familiarizarse con la ubicaci6n de los diversos controles y ajustes. Guarde este manual para referencia en el futuro. Estos simbolos paeden apareeer...
  • Page 23 POUR CONVERTIR LA TONDEUSE La operaci6n de cualquier segadora puede hacer qus Su segadora fue enviada lista para usarse salten objetos extraSos dentro como acolchadora de sapa vegetal. Para de sus ojos, Io que pueds conver_irla a una operaci6n de ensasado: producir daSos graves en estos.
  • Page 24 AGREGUE GASOLINA CONTROL DE LA IMPULSION AVISO: Antes de relfenar el deposito de • La autoimpulsi6n se controla al sujetar la carburante, remover y descartar los residuos barra de control que exige la preeencia del operador haeia abajo en el mango y al del tapon que se encuentran al interior del deposito.
  • Page 25 Sujete la barra de controles que exigen la CONSEJOS PARA SEGAR Y ACOLCHAR presencia del operador abajo en el mango IMPORTANTE: Para obtener el mejor y tire el mango del arrancador rendimeinto mantenga la caja de la segador a r_pidamente. No permita que el corddn del sin acumlacion de cesped y basura.
  • Page 26 PROGRAMA DE MANTENIMIENTO LLENE LAS FECHAS A MEDIDA QUE COMPLETE SU SERVICIO REGULAR FECHAS DE SERVICIO Revisarsi ha}, sujetadoressueltos LirnpiarAnspeccionar el recogedor de c_sped (si viene equipado) Limpiar ia segadora Lirnpiar debajo de la cubierta de la trans- misibn (segadoras con poder propulsor) Revisar las correasy las poleas impul- i •...
  • Page 27 ESPECIFICAClONES DEL PRODUCTO NUMERODE SERIE FECHADE COMPRA CAPACIDADYTIPO 1,5CUARTOS DEGASOLINA: REGULARSIN PLOMO TIPO DEACEITE: SAE30 (SOBRE 32°F) (API-SF-SJ) SAE 5W-30 (DEBAJO32°F) CAPACIDADDE ACEITE: 20 OZ. DE CAPACIDAD BUJiA(ABERTURA: .045') CHAMPIONRJ19LM4 TORSI6N DEL PERNO DE LA CUCHILLA: 35-40 FT.LBS. • El num_ro del nodelo y el de eerie se encuentran en la calcomania adjunta a la parte trasera de la caja de la segadora.
  • Page 28 MOTOR Adaptador de la cuohilta LUBRICACI(_N Chavetero Ranura Use eolamente aceite de detergente de alta ca_idac_claeitica6o con _a c_aeff_aci6n SF-SJ dePclgue5al Aranclela de Ju,,_ _ de servicio API. Seleccione la calidad de viscosidad SAE segt3n su temperatura seguriclad _ Cuchilla operaci6n esperada.
  • Page 29 SILENCIADOR FILTRO DE AIRE Su motor no funcionar_ en forma adecuada y Inspeccione y cambie el silenciador siesta corroido puede producir un peligro de puede sufrir daSos si se usa un filtro de aire SUCiO. incendio y/o da_o. BUJiA Cambie el filtro de aire cada a_o, y m_e a menudo si siega en condiciones Cambie su bujfa cada argo para hacer que su polvorosae o sucias.
  • Page 30 _PRECAUCI6N: Antes de dar calquier PARA AJUSTAR EL MANGO service o de hacer ajustes: El mango superior quede ser ajustado a 1. Suelte la barra de control y pare el motor. cuatro (4) distintes posiciones de altura. 2. AsegL_rese que la cuchilla y que todas lee 1.
  • Page 31 IMPORTANTE: Nunca manipule el regulador MOTOR del motor, el que ha sido ajustado en la f&brica VELOClDAD DEL MOTOR para la velocidad del motor adecuada. Puede La velocidad del motor ha sido ajustada en la ser peligroso hacer funcionar el motor a una fabrica.
  • Page 32 ACEITE DEL MOTOR MOTOR Drene el aceite (con el motor caliente) SISTEMA DE COMBUSTIBLE c_.mbielo con aeeite de motor limpio. (Vea IMPORTANTE: Es importante evitar que se "MOTOR" en la secci6n de "Mantenimiento" formen dep6sitos de goma en partes de este manual.) fundamentales del sistema de combustible CILINDRO...
  • Page 33 IDENTIFICACION DEPROBLEMAS CORRECCION PROBLEMA CAUSA No arranca 1. Filtro de airs sucio. 1. Limpie/cambie el filtro de airs. 2. Sin combustible. 2. Liens el estanque de combus tible. 3. Combustible rancio. 3. Drene el estanque y vuelva a Ilenarlo con combustible limpio y nuevo.
  • Page 34 IDENTIFICACION DE PROBLEMAS PROBLEMA CAUSA CORRECCION Vibraci6n 1. Cuchilla desgastada, doblada 1. Cambie la cuchilla. Apriete el excesiva o suelta, perno de la cuchina. 2. Ciguefial del motor doblado. 2. P6ngase en contacto con su centre de servicio Sears o con un otro centro de servicio cualgicado.
  • Page 35 ROTARY LAWN MOWER-- MODEL NO. 917.378420 GEAR CASE ASSEMBLY PART NUMBER 175258 PART PART DESCRIPTION DESCRIPTION 17490416 Tapping Screw 1/4-20 x 1-1/4 7(30343 Bushing 175248X004 Engagement Bracket 86447 137053 Shifter 137050 HelicaLGear 57072 Seal 750436X Clutch Jaw 48373 Gear Case Halves Kit (Includes 750369 Grease Key NOS.
  • Page 36 ROTARY LAWN MOWER MODEL NUMBER 917.378420 3938 11\_'J...
  • Page 37 ROTARY LAWN MOWER MODEL NUMBER 917.378420 KEY PART KEY PART DESCRIPTION DESCRIPTION 175391)(479 Upper Handle 175O53X004 Selector Spdng 175245X479 LowerHandle 63124 Nut 5/16-18 16978O ControlBar 175575X004 Axle Arm Assembly LR 156577 Engine Zone Control Cable 177321 Hubcap 171407 Handle Bolt 165912 Bolt 136376...
  • Page 38 ROTARY LAWN MOWER MODEL NUMBER 917.378420...
  • Page 39 ROTARY LAWN MOWER MODEL NUMB ER 917.378420 PART PART DESCRIPtiON DESCRIPTION 175065 DdveCover 145755 Control Cable Assembly 132010 751152 Locknut #10-24 Hex Flange Nut 137052 158755 Hex Washer Head Screw 1/4-20 x 2.12 Ddve Pulley 151521 175436 V-Belt Wheel Adjuster Assembly (Left) 150495 175258...
  • Page 40 CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.016708 _355 -390 260/ 370R 275, 182216 "-174172 /_178 370C...
  • Page 41 MODEL NO. 143.016708 CRAFTSMAN 4-CYCLE ENGINE PART PART DESCRIPTION DESCRIPTION Valve Cover 37465 Cylinder (Incl. 2 & 20) 36784 26727 Dowel Pin 30200 Screw, 10-24 x 9/16" 33734 Breather Element 29752 Nut & Lock Washer, 1/4-28 Screw, 1/4-28 x 7/8"...
  • Page 42 MODEL NO. 143.016708 CRAFTSMAN 4-CYCLE ENGINE _--37 PART DESCRIPTION ---- 640271 Carburetor (Incl. 184 of Engine Parts List) 31615 Throttle Shaft & Lever Assembly 31767 Throttle Return Spring 631184 * Dust Seal Washer 631183 * Dust Seal (Throttle) 640070 Throttle Shutter...
  • Page 43 MODEL NO. 143,016708 CRAFTSMAN 4-CYCLE ENGINE PART DESCRIPTION 590702 Recoil Starter 590599A Spring Pin (Incl. 4) 590600 Washer 590696 Retainer 590601 Washer 590697 Brake S ring 590698 Starter [_rg 590699 Dog Spring 590700 Pulley & Rewind Spring Ass'y 590703 Starter Housing Ass'y, (40...
  • Page 44 Get it fixed, at your home or ours! For repairof major brand appliancesin your own home... no matter who made it,no matter who sold 1-800-4-MY-HOME Any_r_, d ayorr,_jht (1-8(X)469-4663) (U+S.A.and Ca_da) WWW.Se_s.COm WWWJ;e_'8._l For repair of carry-inproducts like vacuums, lawn equipment,and electronics, call for the nearestSears Parts and Repair Center.

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