Gas Walk-Behind Mower

Model # 917388391 Official Craftsman 21" 6-hp multi-cut rotary lawn mower

Here are the diagrams and repair parts for Official Craftsman 917388391 21" 6-hp multi-cut rotary lawn mower, as well as links to manuals and error code tables, if available.

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917388391 Walk-Behind Mowers
Lock Nut 83923
#39

Rotary lawn mower diagram

Lock nut

Part #83923

Replaced by #532409149

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Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
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$5.93
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Belt, 21-in 165833
#56

Rotary lawn mower diagram

Belt, 21-in

Part #165833

Replaced by #532406712

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This part replaces 165833. Substitute parts can look different from the original.
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$24.70
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Handle Knob 136376
#14

Rotary lawn mower diagram

Handle knob

Part #136376

Replaced by #532185577

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Manufacturer substitution
This part replaces 136376. Substitute parts can look different from the original.
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$11.93
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Grass Bag 166113
#67

Rotary lawn mower diagram

Grass bag

Part #166113

Replaced by #532410666

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Manufacturer substitution
This part replaces 166113. Substitute parts can look different from the original.
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Discharge Guard 165760
#31

Rotary lawn mower diagram

Discharge guard

Part #165760

Replaced by #589482402

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Manufacturer substitution
This part replaces 165760. Substitute parts can look different from the original.
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$14.85
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Nut Lck 5/16 73990500
#51

Rotary lawn mower diagram

Nut lck 5/16

Part #73990500

Replaced by #596040501

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This part replaces 73990500. Substitute parts can look different from the original.
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Skirt 165858
#21

Rotary lawn mower diagram

Skirt

Part #165858

Replaced by #532413160

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This part replaces 165858. Substitute parts can look different from the original.
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$19.10
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Lawn & Garden Equipment Hinge Screw 88652
#41

Rotary lawn mower diagram

Lawn & garden equipment hinge screw

Part #88652

Replaced by #532088652

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Manufacturer substitution
This part replaces 88652. Substitute parts can look different from the original.
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$4.31
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Lawn & Garden Equipment Screw 851084
#53

Rotary lawn mower diagram

Lawn & garden equipment screw

Part #851084

Replaced by #532851084

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Manufacturer substitution
This part replaces 851084. Substitute parts can look different from the original.
This item is not returnable
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Lawn & Garden Equipment Washer (replaces 532851074, 5328510-74) 851074
#55

Rotary lawn mower diagram

Lawn & garden equipment washer (replaces 532851074, 5328510-74)

Part #851074

Replaced by #532851074

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Manufacturer substitution
This part replaces 851074. Substitute parts can look different from the original.
This item is not returnable
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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.…