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Craftsman 917.20391 - User Manual

Craftsman 917.20391
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® Registered Trademark /
TM
Trademark of KCD IP, LLC in the United States, or Sears Brands, LLC in other countries
® Marca Registrada /
TM
Marca de Fábrica de KCD IP, LLC en Estados Unidos, o Sears Brands, LLC in otros países
Product questions or problems?
1-888-331-4569
Customer Care Hot Line
Get answers to questions, troubleshoot problems,
order parts, or schedule repair service.
Para respuestas a preguntas o problemas, y ordenar
piezas o pedir servicio para la reparación de su equipo.
To help us help you, register your product at www.craftsman.com/registration
Para poderte ayudar mejor, registra tu producto en www.craftsman.com/registration
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Receive exclusive member benefits including special pricing and offers,
project sharing, expert advice, and SHOP YOUR WAY REWARDS!
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02.17.15 CL/TH Printed in the U.S.A.
LAWN TRACTOR
22 HP,
*
48" Mower
Electric Start
Automatic Transmission
Model No.
917.20391
• Español, p. 35
Operator's Manual
For answers to your questions
about this product, call:
1-888-331-4569
Craftsman Customer Help Line
This product has a low emission engine which operates
differently from previously built engines. Before you start the
engine, read and understand this manual.
IMPORTANT:
Read and follow all Safety
Rules and Instructions before
operating this equipment.
* The power rating as declared by the engine manufacturer is the
average gross power output at the specified RPM of a typical
production engine for the engine model measured using SAE
Standards for engine gross power. Please refer to the engine
manufacturer for details.
* La potencia nominal declarada por el fabricante del motor es la
salida media de potencia bruta a las RPM especificadas de un
motor de serie típico para el modelo de motor, medida según
las normas SAE sobre potencia bruta de motor. Para más
información, consulte al fabricante del motor.
Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.
Visit our Craftsman website: www.craftsman.com
586123696 Rev. 4

Questions and Answers

  • M
    Michael TuckerAug 15, 2025
    What to do if Craftsman Lawn tractor engine clicks but won't start?
    • B
      Brandon HendersonAug 15, 2025
      If your Craftsman Lawn tractor's engine clicks but doesn't start, it could be due to several reasons: * A weak or dead battery: Recharge or replace the battery. * Corroded battery terminals: Clean the battery terminals. * Loose or damaged wiring: Check all wiring. * A faulty solenoid or starter: Check or replace the solenoid or starter.
  • A
    Andrea MckeeAug 22, 2025
    Why Craftsman Lawn tractor battery will not charge?
    • K
      kimberly51Aug 22, 2025
      If your Craftsman Lawn tractor's battery won't charge, consider these possibilities: * Bad battery cell(s): Replace the battery. * Poor cable connections: Check and clean all connections. * Faulty regulator: Replace the regulator. * Faulty alternator: Replace the alternator.
  • T
    tristansampsonAug 26, 2025
    What to do if Craftsman Lawn tractor has poor grass discharge?
    • T
      Tammy WalkerAug 26, 2025
      If your Craftsman Lawn tractor has poor grass discharge, consider the following: * Engine speed too slow: Place the throttle control in the “FAST” position. * Travel speed too fast: Shift to a slower speed. * Wet grass: Allow the grass to dry before mowing. * Mower deck not level: Level the mower deck. * Low or uneven tire air pressure: Check the tires for proper PSI. * Worn, bent, or loose blade: Replace or sharpen the blade. * Buildup of grass, leaves, and trash under the mower: Clean the underside of the mower housing. * Mower drive belt worn: Replace the mower drive belt. * Blades improperly installed: Reinstall blades with the sharp edge down. * Clogged mower deck vent holes: Clean around the mandrels to open the vent holes.
  • G
    Grace JacksonAug 28, 2025
    Why does my Craftsman Lawn tractor have excessive vibration?
    • M
      Michael CastroAug 29, 2025
      Excessive vibration in your Craftsman Lawn tractor may be due to: * A worn, bent, or loose blade: Replace the blade. * A bent blade mandrel: Tighten the blade bolt. * Loose or damaged parts: Tighten any loose parts and replace any damaged parts.
  • M
    malonejamesSep 1, 2025
    What to do if Craftsman Lawn tractor headlight(s) not working?
    • Z
      zfletcherSep 1, 2025
      If the headlight(s) on your Craftsman Lawn tractor are not working, check the following: * Light switch is “OFF”: Turn the light switch “ON”. * Bulb(s) or lamp(s) burned out: Replace the bulb(s) or lamp(s). * Faulty light switch: Check or replace the light switch. * Loose or damaged wiring: Check the wiring and connections. * Blown fuse: Replace the fuse.
  • A
    Amanda WestSep 4, 2025
    What to do if Craftsman Lawn tractor mower blades will not rotate?
    • G
      Gregory WallaceSep 4, 2025
      If the mower blades on your Craftsman Lawn tractor will not rotate, it could be due to: * An obstruction in the clutch mechanism: Remove the obstruction. * A worn or damaged mower drive belt: Replace the mower drive belt. * A frozen idler pulley: Replace the idler pulley.
  • A
    Aaron GoldenSep 7, 2025
    What causes poor cut and uneven cutting on a Craftsman Lawn tractor?
    • L
      Linda KelleySep 7, 2025
      A poor cut or uneven cutting with your Craftsman Lawn tractor can result from: * Worn, bent, or loose blade: Replace the blade. * Mower deck not level: Level the mower deck. * Buildup of grass, leaves, and trash under the mower: Clean the underside of the mower housing. * Bent blade mandrel: Tighten the blade bolt.
  • A
    Anthony WeaverSep 12, 2025
    What to do if Craftsman Lawn tractor engine continues to run when operator leaves seat?
    • M
      Michael RodriguezSep 12, 2025
      If the engine of your Craftsman Lawn tractor continues to run when the operator leaves the seat with the attachment clutch engaged, the cause may be a faulty operator-safety presence control system. Check the wiring, switches, and connections. Do not operate the machine until the problem is corrected.
  • M
    mbradfordNov 17, 2025
    Why is my Craftsman Lawn tractor losing power?
    • T
      Tracy LopezNov 17, 2025
      Loss of power in your Craftsman Lawn tractor can occur due to several reasons: * Cutting too much grass or going too fast: Raise the cutting height and reduce speed. * Throttle in “CHOKE” position: Adjust the throttle control. * Build-up of grass, leaves, and trash under the mower: Clean the underside of the mower housing. * Dirty air filter: Clean or replace the air filter. * Low or dirty oil: Check the oil level and change the oil. * Faulty spark plug: Clean, regap, or change the spark plug. * Dirty fuel filter: Replace the fuel filter. * Stale or dirty fuel: Empty the fuel tank and refill with fresh, clean gasoline. * Water in fuel: Empty the fuel tank and carburetor, refill with fresh gasoline, and replace the fuel filter. * Loose spark plug wire: Connect and tight...

Summary

Warranty Information

Battery Limited Warranty

Covers the battery for 90 days against defects in material or workmanship.

Safety Rules

General Safety Precautions

Covers crucial warnings about operation, starting, and general use.

Child Safety

Emphasizes the dangers to children and age restrictions for operation.

General Operation Safety

Details safe operating practices and environmental considerations.

Safety Rules - Continued

Slope Operation Safety

Provides critical safety guidelines for operating the tractor on inclines.

Towing Safety

Covers safe practices and recommendations for towing attachments.

Storage Instructions

Connect Battery

Instructions for safely connecting the tractor's battery.

Assembly Procedures

Operation

Know Your Tractor

Mower Belt Replacement

Instructions for replacing the mower blade drive belt.

How to Use Your Tractor

Tractor Operation Features

Tractor Operation - Advanced

Tractor Attachments and Maintenance

Install Mower

Step-by-step guide for attaching the mower deck to the tractor.

Mower Installation and Operation

Tractor Maintenance Schedule

Cleaning the Tractor

Service Safety Warnings

Critical safety precautions to take before performing any service or adjustments.

Service and Adjustments - Part 2

Safety and Operation

Safety Rules for Operation

General safety guidelines for operating the tractor.

Troubleshooting Common Issues

Provides solutions for common tractor problems like starting issues and loss of power.

Mower Installation Guide

Tractor Operation and Safety

Reverse Operation System (ROS)

How to enable and use the ROS system for reverse operation.

Operating on Hills

Critical safety guidelines for operating the tractor on slopes.

Tractor and Mower Assembly

Tractor Operation and Safety

Tractor Operation and Safety Symbols

Starting with a Weak Battery

Guidance for starting the engine when the battery is weak.

Tractor Maintenance and Adjustments

Battery Replacement

Step-by-step guide for safely replacing the tractor's battery.

Unassembled Parts and Storage

Assembly and Pre-Operation

Details required tools, unpacking, and initial setup steps.

Troubleshooting Chart

Engine Will Not Start

Solutions for common issues preventing the engine from starting.

Hard Starting Issues

Troubleshooting tips for when the engine is difficult to start.

Engine Will Not Turn Over

Diagnosing and fixing problems when the engine does not crank.

Troubleshooting - Service and Safety

Loss of Power Troubleshooting

Diagnosing and resolving issues related to reduced engine power.

Troubleshooting - Cut and Operation Issues

Uneven Cutting Troubleshooting

Solutions for poor or uneven grass cutting.

Safety Rules and Troubleshooting

Loss of Drive Troubleshooting

Diagnosing and fixing problems causing loss of tractor drive.

Child Safety and General Operation

Emphasizes child safety and general operating practices.

Slope Operation Guide

Craftsman Full Warranty

Details the two-year warranty for non-expendable parts against defects.

Additional Limited Warranties

Outlines extended warranties for the frame and front axle.

Craftsman 917.20391 Specifications

General IconGeneral
Engine TypeGasoline
Engine BrandBriggs & Stratton
Cutting Width21 inches
Cutting Height AdjustmentSingle lever
Cutting Positions6
Starter TypeRecoil
Deck MaterialSteel
Discharge OptionsMulch, Rear Bag
Wheel Size8 inches (front)
Fuel TypeUnleaded gasoline

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