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Gas Walk-Behind Mower

Model # 551-059M400 Official Yard-Man lawn mower

Here are the diagrams and repair parts for Official Yard-Man 551-059M400 lawn mower, as well as links to manuals and error code tables, if available.

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Browse Parts for551-059M400 Walk-Behind Mowers

  • Screw BN-Z24006
    Screw

    Part #BN-Z24006

    Replaced by #710-0514

    ?
    Manufacturer substitution
    This part replaces BN-Z24006. Substitute parts can look different from the original.
    This item is not returnable
    $5.33
    19% OFF Phone Price : $6.56
    In Stock
  • Screw BN-Z70003
    #39

    48" & 52" blade belt drive system diagram

    Screw

    Part #BN-Z70003

    Replaced by #712-0429

    ?
    Manufacturer substitution
    This part replaces BN-Z70003. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
  • Screen BN-PL4759
    #2

    Transmission diagram

    Screen

    Part #BN-PL4759

    Replaced by #710-3015

    ?
    Manufacturer substitution
    This part replaces BN-PL4759. Substitute parts can look different from the original.
    This item is not returnable
    $5.12
    20% OFF Phone Price : $6.37
    Back Order
  • Screw BN-Z19010
    #12

    Rear wheel diagram

    Screw

    Part #BN-Z19010

    Replaced by #710-0376

    ?
    Manufacturer substitution
    This part replaces BN-Z19010. Substitute parts can look different from the original.
    This item is not returnable
    $5.11
    19% OFF Phone Price : $6.34
    In Stock
  • Yard-man 5/16-18x4-3 710-0974
    #57

    Rear deck, brakes & wheel drive system diagram

    Yard-man 5/16-18x4-3

    Part #710-0974

    In Stock
  • Screw BN-Z14014
    #3

    Handle assembly diagram

    Screw

    Part #BN-Z14014

    Replaced by #710-0501

    ?
    Manufacturer substitution
    This part replaces BN-Z14014. Substitute parts can look different from the original.
    In Stock
  • Washer BN-PL4741
    #9E

    Transmission diagram

    Washer

    Part #BN-PL4741

    Replaced by #936-0337

    ?
    Manufacturer substitution
    This part replaces BN-PL4741. Substitute parts can look different from the original.
    In Stock
  • Washer BN-PL4742
    #9C

    Transmission diagram

    Washer

    Part #BN-PL4742

    Replaced by #936-0336

    ?
    Manufacturer substitution
    This part replaces BN-PL4742. Substitute parts can look different from the original.
    In Stock
  • Screw BN-Z14003
    #48

    Rear deck, brakes & wheel drive system diagram

    Screw

    Part #BN-Z14003

    Replaced by #710-0751

    ?
    Manufacturer substitution
    This part replaces BN-Z14003. Substitute parts can look different from the original.
    This item is not returnable
    $5.12
    16% OFF Phone Price : $6.12
    In Stock
  • Cotter Pin BN-Z50001
    #22

    Rear deck, brakes & wheel drive system diagram

    Cotter pin

    Part #BN-Z50001

    Replaced by #914-0507

    ?
    Manufacturer substitution
    This part replaces BN-Z50001. Substitute parts can look different from the original.
    This item is not returnable
    $6.96
    16% OFF Phone Price : $8.27
    In Stock

Symptoms for gas walk-behind mowers

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

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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.

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your walk-behind mowers

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

The best time of day to mow grass (and when you should absolutely not)

The best time of day to mow grass (and when you should absolutely not)

Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…

Top 10 electric lawn and garden tools

Top 10 electric lawn and garden tools

Learn about the top 10 must-have electric lawn & garden tools for 2023…

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

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

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

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