Craftsman CMXGMAM1125505

Questions and Answers

S
Stephanie JacksonAug 16, 2025
Why my Craftsman Lawn Mower engine fails to start?
- V
  Vicki PittmanAug 16, 2025
  If your Craftsman Lawn Mower engine won't start, there are several potential causes: * The blade control may be disengaged. Engage the blade control. * The fuel valve may be OFF. Move the fuel valve lever to ON. * The spark plug boot may be disconnected. Connect the wire to the spark plug boot. * The fuel tank may be empty or contain stale fuel. Refill with fresh gasoline. * The engine may not be primed. Prime the engine as instructed in the Operation section. * The spark plug may be faulty. Clean, adjust the gap, or replace it. * The engine may be flooded. Wait a few minutes before attempting to restart. * The fuel line may be blocked. Contact your Parts & Repair Center to have the fuel line cleaned.
S
Sharon BishopAug 19, 2025
What to do if my Craftsman CMXGMAM1125505 Lawn Mower will not self propel?
- C
  Cynthia GarciaAug 19, 2025
  If your Craftsman Lawn Mower won't self-propel, consider these potential causes: 1. The belt may not be installed properly. Check the belt for correct pulley installation and movement. 2. Debris may be clogging the drive operation. Stop the engine, disconnect the spark plug boot, and clean out any debris. 3. The belt may be damaged or worn. Inspect and replace the belt if necessary. 4. The drive control may be out of adjustment. Adjust the drive control. See Drive Control Adjustment in Assembly section.
H
hbruceAug 22, 2025
How to fix uneven cut with Craftsman CMXGMAM1125505?
- R
  Richard WareAug 22, 2025
  If your Craftsman Lawn Mower is producing an uneven cut, it is likely due to a dull blade. Sharpen or replace the blade.
S
Shane MullenAug 25, 2025
Why is my Craftsman CMXGMAM1125505 engine running erratic?
- T
  tranrobertAug 26, 2025
  If your Craftsman Lawn Mower engine is running erratically, it could be due to: * A loose spark plug boot. Connect and tighten the spark plug boot. * Stale fuel. Replace the stale fuel with clean, fresh gasoline. * A plugged vent in the gas cap. Clear the vent. * Water or dirt in the fuel system. Run the engine until it stops from lack of fuel, then refill with fresh fuel. * A dirty air cleaner. Refer to Air Cleaner Maintenance in Engine Manual. * A blocked fuel line. Contact your Parts & Repair Center to have the fuel line cleaned.
C
carolgriffinAug 28, 2025
Why is my Craftsman Lawn Mower engine overheating?
- J
  James BrownAug 28, 2025
  If your Craftsman Lawn Mower engine is overheating, check the following: * Engine oil level: If the oil level is low, fill the crankcase with the proper oil. * Air flow: If airflow is restricted, clean the area around and on top of the engine.
V
vincentwarrenAug 31, 2025
Why is my Craftsman CMXGMAM1125505 experiencing excessive vibration?
- S
  Shirley WilsonAug 31, 2025
  If your Craftsman Lawn Mower is vibrating excessively, the cause might be: * A loose or unbalanced cutting blade. Tighten the blade and adapter, and balance the blade. * A bent cutting blade. Replace the blade.
N
Natasha MartinSep 3, 2025
Why Craftsman CMXGMAM1125505 Lawn Mower will not mulch grass?
- J
  Jeffrey WaltersSep 3, 2025
  If your Craftsman Lawn Mower isn't mulching grass effectively, consider these factors: * Wet grass: Avoid mowing when the grass is wet; wait for it to dry. * Excessively high grass: Mow once at a higher cutting height, then mow again at the desired height, or narrow the cutting path. * Dull blade: Sharpen or replace the blade.
T
Terry RichardsSep 6, 2025
Why does my Craftsman CMXGMAM1125505 idle poorly?
- J
  Jessica MorrisonSep 6, 2025
  If your Craftsman Lawn Mower idles poorly, it could be due to: * A spark plug that is fouled, faulty, or has a gap that is too wide. Reset the gap or replace the spark plug. * A dirty air cleaner. Refer to Air Cleaner Maintenance in Engine Manual.
B
Bruce DickersonSep 9, 2025
What causes occasional skips in Craftsman CMXGMAM1125505 Lawn Mower?
- W
  William HarrisonSep 9, 2025
  If your Craftsman Lawn Mower occasionally skips or hesitates, the spark plug gap may be too close. Adjust the gap, referring to the Spark Plug Maintenance section in the Engine Manual.
K
Karen WardSep 12, 2025
What causes high pullback effort in Craftsman Lawn Mower?
- J
  Jessica GuzmanSep 12, 2025
  If you're experiencing high pullback effort with your Craftsman Lawn Mower, it may be because you're pulling the mower backwards before the transmission disengages. Allow the unit to roll forward slightly without the drive lever(s) engaged before pulling backwards.

Summary

Safety Instructions

General Operation Safety

Essential safety practices for operating the mower, including user responsibilities, area preparation, and safe handling of fuel.

Slope Operation Safety

Guidelines for safely operating the mower on sloped terrain, emphasizing caution and terrain limitations.

Child Safety

Precautions to ensure the safety of children around the operating lawn mower.

Gasoline Handling Safety

Safe procedures for handling gasoline to prevent fire and explosion hazards.

Storage and General Service Safety

Safety precautions for storing the mower, general maintenance, and engine operation.

Engine Modification and Emissions

Warnings against modifying the engine and information regarding emissions compliance and spark arrestors.

Spark Arrestor Requirement

Requirement for a spark arrestor on land with flammable vegetation for fire prevention.

Safety Symbol Explanations

Explanations of common safety symbols found on the mower and in the manual.

Slope Gauge

How to Use the Slope Gauge

Step-by-step guide on using the provided slope gauge to assess terrain safety.

Assembly

Unpacking the Mower

Instructions for safely unpacking the lawn mower from its shipping carton.

Handle Setup and Adjustment

Guide to assembling the mower's handles, including connecting and securing them.

Attaching the Grass Catcher

Instructions for properly attaching the grass catcher to collect clippings.

Attaching Side Discharge Cover

Guide on how to install the side discharge cover for alternative grass clipping management.

Adjustments

Cutting Height Adjustment

Steps to adjust the mower's cutting height using the dual lever system.

Drive Control Adjustment

Guide for adjusting the drive control wheel to tighten or loosen the drive belt.

Handle Pitch Adjustment

How to adjust the mower handle's pitch for operator comfort.

Operation

Blade Control Operation

Instructions on how to engage and disengage the blade control for operation.

Drive Control Operation

Guide to using the dual lever drive controls to propel the mower.

Cutting Height Adjustment Reference

Information on adjusting the cutting height and where to find detailed instructions.

Side Discharge Cover Usage

How to use the side discharge cover to direct grass clippings to the side.

Component Overview

Overview of various mower components like grass catcher, mulch plugs, trail shield, deck wash, and starter.

Starting and Stopping the Engine

Detailed steps for safely starting and stopping the lawn mower engine.

Operating the Lawn Mower

Guidance on operating the mower's drive system and speed controls.

Mulching and Using Grass Catcher

Instructions on how to mulch grass or use the grass catcher for collecting clippings.

Service and Maintenance

Maintenance Schedule

A schedule outlining recommended maintenance tasks and intervals for the mower.

General Recommendations and Lubrication

General tips for maintenance, warranty, and lubrication of the blade control.

Engine Maintenance and Cleaning

Procedures for cleaning the engine and general engine maintenance.

Mower Deck Cleaning and Deck Wash

Instructions for cleaning the mower deck, including using the deck wash system.

Blade Care and Replacement

Guide for inspecting, sharpening, balancing, and replacing the mower blade.

Belt Care

Note regarding drive belt replacement requiring service center assistance.

Off-Season Storage

Preparing the Engine for Storage

Instructions for preparing the engine for long-term storage, including fuel system treatment.

Preparing the Mower for Storage

Guidelines for cleaning, lubricating, and protecting the mower for storage.

Troubleshooting

Troubleshooting Common Problems

A guide to diagnosing and resolving common problems encountered with the mower.

Craftsman CMXGMAM1125505 Specifications

General

Engine Brand	Briggs & Stratton
Cutting Width	21 inches
Drive Type	Self-Propelled
Deck Material	Steel
Number of Cutting Positions	6
Mulching Capability	Yes
Side Discharge	Yes
Rear Bag	Yes
Speed Settings	Variable
Warranty	2 years
Cutting Height	1.25 - 3.75 inches