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Front-Engine Lawn Tractor

Model # 502254981 Official Craftsman 12-hp lawn mower

Here are the diagrams and repair parts for Official Craftsman 502254981 12-hp lawn mower, as well as links to manuals and error code tables, if available.

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Browse Parts for502254981 Riding Mowers & Tractors

  • Gasket 91309
    #13

    Engine mount diagram

    Gasket

    Part #91309

    Replaced by #692236

    ?
    Manufacturer substitution
    This part replaces 91309. Substitute parts can look different from the original.
    BEST SELLER
    $6.76
    13% OFF Phone Price : $7.76
    In Stock
  • E-ring STD581075
    #57

    Motion drive diagram

    E-ring

    Part #STD581075

    Replaced by #812000029

    ?
    Manufacturer substitution
    This part replaces STD581075. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    $4.51
    18% OFF Phone Price : $5.51
    In Stock
  • Bolt 25X6
    #14

    Mower housing diagram

    Bolt

    Part #25X6

    Replaced by #817000616

    ?
    Manufacturer substitution
    This part replaces 25X6. Substitute parts can look different from the original.
    In Stock
  • Key 91275
    #13

    Wiring diagram

    Key

    Part #91275

    Replaced by #691959

    ?
    Manufacturer substitution
    This part replaces 91275. Substitute parts can look different from the original.
    This item is not returnable
    $11.16
    15% OFF Phone Price : $13.16
    In Stock
  • Fuel Cap 55989
    #1

    Engine mount diagram

    Fuel cap

    Part #55989

    Replaced by #092317MA

    ?
    Manufacturer substitution
    This part replaces 55989. Substitute parts can look different from the original.
    This item is not returnable
    $15.29
    12% OFF Phone Price : $17.29
    In Stock
  • Housing 90905
    #50

    Mower housing diagram

    Housing

    Part #90905

    Replaced by #492574MA

    ?
    Manufacturer substitution
    This part replaces 90905. Substitute parts can look different from the original.
    $60.44
    9% OFF Phone Price : $66.44
    In Stock
  • Bolt STD533107
    Bolt

    Part #STD533107

    The manufacturer no longer makes this part, and there's no substitute part

  • Bolt 25X7
    #15

    Engine mount diagram

    Bolt

    Part #25X7

    Replaced by #2828635SM

    ?
    Manufacturer substitution
    This part replaces 25X7. Substitute parts can look different from the original.
    This item is not returnable
    $8.47
    11% OFF Phone Price : $9.47
    In Stock
  • Bolt 9X39
    Bolt

    Part #9X39

    Replaced by #9X39MA

    ?
    Manufacturer substitution
    This part replaces 9X39. Substitute parts can look different from the original.
    In Stock
  • Switch 24273
    #17

    Wiring diagram

    Switch

    Part #24273

    Replaced by #5021451SM

    ?
    Manufacturer substitution
    This part replaces 24273. Substitute parts can look different from the original.
    This item is not returnable
    In Stock

Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

Main causes: faulty battery, bad alternator…

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

Main causes: shift lever needs adjustment, neutral control needs adjustment…

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…

Most common repair guides to help fix your riding mowers & tractors

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

How to replace a mandrel assembly on a riding lawn mower

How to replace a mandrel assembly on a riding lawn mower

Replace the mandrel assembly if the blade shaft vibrates or doesn't spin.…

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

How to replace the flywheel key on a riding lawn mower

If the engine won't restart after hitting a stump or rock, the problem could be a sheared flywheel key. Follow these ste…

Repair difficulty
Time required
 60 minutes or less
How to replace a riding lawn mower ignition coil

How to replace a riding lawn mower ignition coil

If you're not getting spark from a good spark plug, the problem could be the ignition coil. Follow these step-by-step in…

Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

Why your mower loses power when the blades are engaged

Why your mower loses power when the blades are engaged

Blades on, power gone? If your mower sputters or stalls when cutting starts, we’ll help you track down the problem and f…

What's the difference between a lawn tractor and a garden tractor?

What's the difference between a lawn tractor and a garden tractor?

Do you know a lawn tractor from a garden tractor? Take a look at the key differences and discover how each handles your …

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…

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