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Craftsman CMXGMAM1125500 m140 lawnmower

Craftsman CMXGMAM1125500 m140 lawnmower Parts

Here are the diagrams and repair parts for Craftsman CMXGMAM1125500 m140 lawnmower, as well as links to manuals and error code tables, if available.

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Browse Parts for CMXGMAM1125500 Walk-Behind Mowers

  • Mtd Lawn Mower Grass Bag Frame for Craftsman CMXGMAM1125500 - Part 647-04271-0637

    Lawn mower diagram

    Mtd Lawn Mower Grass Bag Frame

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  • Plug Asm-mul for Craftsman CMXGMAM1125500 - Part 687-06029

    Lawn mower diagram

    Mtd Lawn Mower Mulching Plug Assembly

    Part #987-02516A

    Replaced by #687-06029

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    This part replaces 987-02516A. Substitute parts can look different from the original.
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    $41.10
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  • Mtd Lawn Mower Grass Bag for Craftsman CMXGMAM1125500 - Part 664P05322A

    Lawn mower diagram

    Lawn Mower Grass Bag

    Part #664P05322

    Replaced by #664P05322A

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    Manufacturer substitution
    This part replaces 664P05322. Substitute parts can look different from the original.
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  • Cap Asm Fuel for Craftsman CMXGMAM1125500 - Part 17620-Z8B-800

    Lawn mower diagram

    Fuel Cap Assembly

    Part #17620-Z0J-800

    Replaced by #17620-Z8B-800

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    This part replaces 17620-Z0J-800. Substitute parts can look different from the original.
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  • Lawn & Garden Equipment Engine Spark Plug for Craftsman CMXGMAM1125500 - Part 98079-55846

    Lawn mower diagram

    Lawn & Garden Equipment Engine Spark Plug

    Part #98079-55846

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

  •  for Craftsman CMXGMAM1125500 - Part N/P

    Lawn mower diagram

    Part #N/P

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

Craftsman M140 LAWNMOWER CMXGMAM1125500 FAQs

Craftsman mowers are typically good-quality, homeowner-focused machines; for the Craftsman CMXGMAM1125500 walk-behind mower, you can expect solid everyday cutting performance and straightforward maintenance when it is kept clean, properly serviced, and used within normal yard conditions.

What “good quality” usually means for CMXGMAM1125500

Quality on a walk-behind mower like CMXGMAM1125500 is mostly about consistent starting, even cutting, and parts that hold up to routine use.

  • Starts reliably when fuel is fresh and the air filter and spark plug are maintained
  • Cuts evenly when the blade is sharp and the deck is kept clean
  • Holds up well for typical residential mowing schedules
  • Easier ownership when wear items are replaced before they cause bigger issues
What affects real-world durability the most

Even a well-built mower can feel “low quality” if a few basics are off.

  • Mowing conditions: tall, wet, or very thick grass increases load and wear
  • Maintenance cadence: oil changes, blade sharpening, and cleaning matter most
  • Storage: dry storage reduces corrosion and fuel-system problems
  • Consumables: using the right fuel and replacing worn items on time
Parts support that helps keep it running well

If you bag clippings, a worn or torn bag can reduce airflow and collection performance. For this model, the compatible replacement is the lawn mower grass bag 664P05322A.

Symptom Common cause What to do
Poor bagging or clippings left behind Bag torn or clogged Clean or replace the bag
Uneven cut Dull blade or deck buildup Sharpen blade, clean underside
Hard starting Old fuel or neglected tune-up items Refresh fuel, service basics
Why it matters

A mower’s “quality” shows up over time. With routine upkeep and timely replacement of wear parts, CMXGMAM1125500 can deliver dependable results season after season for normal residential lawns.

Last updated: January 2026

Common problems we see on Craftsman walk-behind mowers like model CMXGMAM1125500 include hard starting, rough running, stalling in tall grass, uneven cutting, poor bagging, and excessive vibration. Some issues mentioned for other Craftsman mower types (like deck grooves or hood mounts) do not apply the same way to this specific walk-behind model.

Most common symptoms and likely causes
  • Won’t start or is hard to start: old fuel, dirty spark plug, clogged air filter, carburetor varnish
  • Starts then dies: restricted fuel flow, dirty carburetor, stuck choke, clogged gas cap vent
  • Cuts unevenly: dull or bent blade, low tire pressure (if equipped), deck packed with wet grass
  • Leaves clumps or won’t bag well: clogged chute, overgrown/wet grass, worn or damaged bag
  • Vibrates or rattles: loose blade bolt, bent blade, debris wrapped around blade adapter
Quick checks we recommend (safe DIY)
  1. Turn the engine OFF and disconnect the spark plug wire before touching the blade area.
  2. Drain and replace old fuel; use fresh gasoline.
  3. Inspect and clean the underside of the deck (built-up grass causes poor cut and stalling).
  4. Check the spark plug condition and gap; replace if fouled.
  5. Inspect the grass collection system; if the bag is torn or collapsing, replace it with the lawn mower grass bag 664P05322A.
When it’s a parts issue vs. maintenance
What you notice More likely maintenance More likely a part problem
Hard starting after storage Old fuel, dirty plug Carburetor issues
Clumping and poor bagging Wet/overgrown grass Torn or deformed bag
Strong vibration Debris under deck Bent blade or loose hardware
Why it matters

Catching these problems early helps protect the engine, improves cut quality, and reduces strain on the blade and deck. It also prevents repeat clogging and stalling when mowing thicker grass.

Last updated: January 2026

For the Craftsman CMXGMAM1125500 walk-behind mower, the exact build year usually cannot be identified from the model number alone; it depends on how the serial number is formatted on your specific data tag. Once you locate the serial number, we can use its date code pattern (if present) to determine the year.

Where to find the serial number on CMXGMAM1125500

On most Craftsman walk-behind mowers, the model and serial tag is on the rear deck area, near the discharge opening, or on the back of the mower housing near the height adjusters.

  • Look on the mower deck (top surface) near the engine mounting area
  • Check the rear of the deck behind the bagger opening
  • Inspect the side of the deck near a rear wheel height adjuster
  • Wipe dirt and grass off the tag so all digits are readable

If your mower uses a rear bagger, removing the bag can make the tag easier to see; the lawn mower grass bag 664P05322A is the bag assembly used on this model.

How serial number date codes commonly work (what to look for)

Craftsman serial formats vary by manufacturer and production run, so we match the pattern on your tag rather than assuming one universal rule.

Common date-code clues include:

  • A 2-digit year embedded in the serial (example: 11 = 2011)
  • A 4-digit year (example: 2019)
  • A month-day-year block (example: MMDDYY)
  • A week-year code (example: WWYY)
Quick pattern check
What you see in the serial Often means Example interpretation
6 digits like MMDDYY Month, day, year 072811 = July 28, 2011
4 digits like YYYY Year only 2018 = year 2018
WWYY Week and year 2319 = week 23 of 2019
Why it matters

Knowing the correct year helps us match the right parts and specs for your CMXGMAM1125500, especially when there were mid-year changes to items like the blade, drive components, or bagging hardware.

Last updated: January 2026

Most common symptoms to help you fix your walk-behind mowers

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

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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.

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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 re…

Repair time and Difficulty

 45 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.

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

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Types of walk-behind mower blades video

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