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Front-Engine Lawn Tractor

Model # 13AL78XT299 Official MTD tractor

Here are the diagrams and repair parts for Official MTD 13AL78XT299 tractor, as well as links to manuals and error code tables, if available.

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Browse Parts for13AL78XT299 Riding Mowers & Tractors

  • Lawn Tractor Blade Drive Belt, 1/2 X 103-1/16-in 954-04219
    #51

    Deck/spindle assembly diagram

    Lawn tractor blade drive belt, 1/2 x 103-1/16-in

    Part #954-04219

    Replaced by #490-501-M009

    ?
    Manufacturer substitution
    This part replaces 954-04219. Substitute parts can look different from the original.
    BEST SELLER

    Get free shipping with Automatic Reorder

    $35.50 | 
    14% OFF Phone Price : $41.50
    In Stock
  • Lawn Tractor 46-in Deck 2-in-1 Blade 942-04290
    #45

    Deck/spindle assembly diagram

    Lawn tractor 46-in deck 2-in-1 blade

    Part #942-04290

    Replaced by #942-04290A

    ?
    Manufacturer substitution
    This part replaces 942-04290. Substitute parts can look different from the original.
    BEST SELLER

    Get free shipping with Automatic Reorder

    $22.79 | 
    21% OFF Phone Price : $28.79
    In Stock
  • Mtd Lawn Tractor Ground Drive Belt, 2/3 X 90-4/5-in 954-0467A
    #61

    Transmission/wheel assembly diagram

    Mtd lawn tractor ground drive belt, 2/3 x 90-4/5-in

    Part #954-0467A

    Replaced by #490-501-Y035

    ?
    Manufacturer substitution
    This part replaces 954-0467A. Substitute parts can look different from the original.
    BEST SELLER

    Get free shipping with Automatic Reorder

    $41.64 | 
    10% OFF Phone Price : $46.43
    In Stock
  • Mtd Lawn & Garden Equipment Cotter Pin, 1/4- To 5/16-in 714-04040
    Mtd lawn & garden equipment cotter pin, 1/4- to 5/16-in

    Part #714-04040

    BEST SELLER
    This item is not returnable
    $2.81 | 
    28% OFF Phone Price : $3.90
    In Stock
  • Mtd Lawn Tractor Transaxle Belt, 47-3/8 X 3/8-in 954-04208A
    #60

    Transmission/wheel assembly diagram

    Mtd lawn tractor transaxle belt, 47-3/8 x 3/8-in

    Part #954-04208A

    Replaced by #490-501-Y007

    ?
    Manufacturer substitution
    This part replaces 954-04208A. Substitute parts can look different from the original.
    BEST SELLER

    Get free shipping with Automatic Reorder

    $33.21 | 
    17% OFF Phone Price : $40.24
    In Stock
  • Exhaust Gasket BS-692236
    #7

    Engine/muffler diagram

    Exhaust gasket

    Part #BS-692236

    Replaced by #692236

    ?
    Manufacturer substitution
    This part replaces BS-692236. Substitute parts can look different from the original.
    BEST SELLER
    $6.76 | 
    11% OFF Phone Price : $7.56
    In Stock
  • Lawn & Garden Equipment Hex Flange Nut 712-0417A
    #20

    Deck/spindle assembly diagram

    Lawn & garden equipment hex flange nut

    Part #712-0417A

    BEST SELLER
    $8.24 | 
    8% OFF Phone Price : $9.00
    In Stock
  • Yard Machines Lawn & Garden Equipment Lock Nut, 5/16-18 712-04063
    Yard machines lawn & garden equipment lock nut, 5/16-18

    Part #712-04063

    BEST SELLER
    This item is not returnable
    $4.40 | 
    20% OFF Phone Price : $5.53
    In Stock
  • Lawn Tractor Ignition Key 625-04124
    #33

    Upper dash panel/fuel tank diagram

    Lawn tractor ignition key

    Part #625-04124

    Replaced by #925-1745A

    ?
    Manufacturer substitution
    This part replaces 625-04124. Substitute parts can look different from the original.
    BEST SELLER
    $20.09 | 
    25% OFF Phone Price : $26.71
    In Stock
  • Mtd Lawn Tractor Gauge Wheel 734-04155
    #31

    Deck/spindle assembly diagram

    Mtd lawn tractor gauge wheel

    Part #734-04155

    BEST SELLER
    $24.12 | 
    18% OFF Phone Price : $29.42
    In Stock

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

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

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How do I fix a flat tire on my riding mower?

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

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Why does my riding mower run rough or misfire?

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

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Why won't my riding mower move?

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

Read more

Why is the steering loose on my riding mower?

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

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Why is my riding mower leaking oil or gas?

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

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Why does my riding mower creep in neutral?

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

Read more

Why won't my riding mower cut grass?

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

Read more

Why does my riding mower deck vibrate?

Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…

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How do I charge a dead battery on my riding mower?

Main causes: faulty battery, bad alternator…

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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.

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How to replace the starter motor on a riding lawn mower

How to replace the starter motor on a riding lawn mower

If you hear the solenoid click but don’t hear the starter motor spin when you turn the key, follow these steps to replac…

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Repair difficulty
Time required
 30 minutes or less
How to replace a riding lawn mower rear tire

How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…

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How to replace a riding lawn mower blade

How to replace a riding lawn mower blade

If a blade on your mower is dull or bent, replace it following the steps in this repair guide.…

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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.

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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 …

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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)

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