Craftsman
Gas Walk-Behind Mower

Model #917380542 Official Craftsman lawn mower

Here are the diagrams and repair parts for Craftsman 917380542 lawn mower, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

    Showing 10 of 239 parts

    Lawn & Garden Equipment Engine Oil, SAE 30, 20-oz

    #NI

    All parts Diagram

    Lawn & garden equipment sae 30w engine oil, 20-oz

    Part #33300
    Replaced by #40020
    ?
    Manufacturer substitution
    This part replaces 33300. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable

    Get free shipping with Automatic Reorder

    In Stock
    $3.94 | 
    58% OFF 
    Was: $9.39
    Lawn Mower Handle Knob#10

    Craftsman 20" rotary lawnmower Diagram

    Handle knob

    Part #136376
    Replaced by #532185577
    ?
    Manufacturer substitution
    This part replaces 136376. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $1.99 | 
    34% OFF 
    MSRP: $3.00
    Lawn & Garden Equipment Hex Head Bolt, 3/8-24 x 1-1/8-in#35

    Craftsman 20" rotary lawnmower Diagram

    Lawn & garden equipment screw

    Part #851084
    Replaced by #532435345
    ?
    Manufacturer substitution
    This part replaces 851084. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $3.49 | 
    22% OFF 
    Phone Price: $4.49
    Lawn Mower Bolt#51

    Craftsman 20" rotary lawnmower Diagram

    Handle bolt

    Part #131959
    Replaced by #532191574
    ?
    Manufacturer substitution
    This part replaces 131959. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    Back Order
    $2.89 | 
    26% OFF 
    Phone Price: $3.89
    Lawn & Garden Equipment Engine Carburetor Needle Valve Kit#30

    4-cycle engine Diagram

    Needle seat

    Part #631021
    Replaced by #631021B
    ?
    Manufacturer substitution
    This part replaces 631021. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $5.83 | 
    20% OFF 
    Was: $7.29
    Lawn Tractor Lock Nut#32

    Craftsman 20" rotary lawnmower Diagram

    Lock nut

    Part #751592
    Replaced by #73930600
    ?
    Manufacturer substitution
    This part replaces 751592. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $2.59 | 
    28% OFF 
    Phone Price: $3.59
    Lawn Mower Blade Adapter#39

    Craftsman 20" rotary lawnmower Diagram

    Lawn mower blade adapter

    Part #850977
    Replaced by #581547901
    ?
    Manufacturer substitution
    This part replaces 850977. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $14.39 | 
    12% OFF 
    Phone Price: $16.39
    Lawn & Garden Equipment Engine Carburetor Float#28

    4-cycle engine Diagram

    Float

    Part #632019
    Replaced by #632019A
    ?
    Manufacturer substitution
    This part replaces 632019. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $8.89 | 
    10% OFF 
    Phone Price: $9.89
    Lawn & Garden Equipment Engine Carburetor Primer Bulb#35

    4-cycle engine Diagram

    Primer assembly

    Part #632047
    Replaced by #632047A
    ?
    Manufacturer substitution
    This part replaces 632047. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $3.55
    Lawn & Garden Equipment Engine Recoil Starter Assembly

    #NI

    All parts Diagram

    Starter

    Part #590694
    Replaced by #590785
    ?
    Manufacturer substitution
    This part replaces 590694. Substitute parts can look different from the original.
    BEST SELLER
    In Stock
    $31.51 | 
    20% OFF 
    Was: $39.39

    Symptoms for gas walk-behind mowers

    Choose a symptom to see related walk-behind mower repairs.

    Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade
    Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up
    Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent
    Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key
    Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel
    Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil

    Repair guides for gas walk-behind mowers

    These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

    March 1, 2016
    By Lyle Weischwill
    How to replace a lawn mower blade

    Check your lawn mower blade regularly and replaced it if it's bent or damaged.

    Repair difficulty
    Time required
     15 minutes or less
    How to replace a lawn mower ignition coil on an OHV engine

    Replace the ignition coil if it isn't sending electric current to the spark plug when you pull the recoil starter rope.

    Repair difficulty
    Time required
     30 minutes or less
    How to replace a lawn mower flywheel key on a flathead engine

    When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to replace this tiny but essential part.

    Repair difficulty
    Time required
     45 minutes or less

    Articles and videos common to all walk-behind mowers

    Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

    August 30, 2022

    How to enjoy all the online benefits we offer on our Sears PartsDirect website

    By Lyle Weischwill

    Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.

    August 5, 2022

    Introducing new technical repair content that we’re developing for the Sears Technical Institute

    By Lyle Weischwill

    Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.

    June 29, 2022

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    By Lyle Weischwill

    Get answers to frequently asked questions about Sears and Sears PartsDirect.