Craftsman 12A-764M799 User Manual (English)

Questions and Answers:

A
Anne CohenAug 13, 2025
Why won't my Craftsman Lawn Mower start?
- T
  Tara MccormickAug 13, 2025
  If your Craftsman Lawn Mower engine won't start, several factors could be the cause. First, ensure the choke is activated by placing the throttle/choke control lever into the choke position and that the throttle/choke lever is in the fast position. Check that the spark plug wire is connected to the spark plug. The spark plug could be faulty, so clean, adjust the gap, or replace it. The fuel tank might be empty or contain stale fuel, so fill it with clean, fresh gasoline. Finally, a blocked fuel line could be the issue, in which case you should have the fuel line cleaned by a Sears service dealer.
C
charleswilsonAug 16, 2025
What to do if my Craftsman Lawn Mower fails to propel itself?
- T
  thomasbrettAug 16, 2025
  If your Craftsman Lawn Mower fails to propel itself, the drive belt may be loose or damaged. Replace the drive belt.
B
brandyandersonAug 20, 2025
What to do if my Craftsman Lawn Mower engine runs erratically?
- J
  Jennifer SchroederAug 20, 2025
  If your Craftsman Lawn Mower engine runs erratically, there are several possible causes. Make sure the unit is not running with the choke applied; if it is, move the throttle/choke lever out of the choke position. Check the spark plug wire to ensure it is connected and tight. Stale fuel can also cause this issue, so fill the tank with fresh gasoline. Additionally, water or dirt in the fuel system could be the problem; drain the fuel and refill with fresh fuel. Lastly, a dirty air cleaner can cause the engine to run erratically, so replace the air cleaner cartridge.
J
joshuabradleyAug 25, 2025
Why is my Craftsman 12A-764M799 engine overheating?
- V
  Vickie RobinsonAug 25, 2025
  If your Craftsman Lawn Mower engine is overheating, it could be due to a low engine oil level. Fill the engine with the proper amount and type of oil. Another cause could be restricted airflow. Clean any grass clippings and debris from around the engine’s cooling fins and blower housing.
V
vclarkAug 27, 2025
What causes poor mowing performance in my Craftsman 12A-764M799 Lawn Mower?
- S
  Sarah BakerAug 27, 2025
  Poor mowing performance in your Craftsman Lawn Mower can be attributed to several factors. Dull blades are a common cause, so sharpen or replace them. Broken, loose, or worn belts can also lead to poor performance, so replace the belts. Additionally, if the blades are out of balance, balance or replace them.
J
Jeremy RubioAug 31, 2025
What to do if my Craftsman 12A-764M799 engine idles poorly?
- M
  Marcus MorenoAug 31, 2025
  If your Craftsman Lawn Mower engine idles poorly, a fouled spark plug could be the cause. Replace the spark plug and adjust the gap. Alternatively, a dirty air cleaner might be the issue, so replace the air cleaner cartridge.
M
Michael MarshallSep 4, 2025
Why does my Craftsman Lawn Mower engine hesitate at high RPMs?
- C
  Christine MunozSep 4, 2025
  If your Craftsman Lawn Mower engine hesitates at high RPMs, it could be due to the spark plug gap being set too close. Remove the spark plug and adjust the gap.
J
James RichardSep 7, 2025
How to reduce excessive vibration in my Craftsman 12A-764M799?
- J
  Jerry TorresSep 7, 2025
  Excessive vibration in your Craftsman Lawn Mower can stem from a few issues. Start by checking the cutting blades to ensure they are tightened and balanced. If they are loose, tighten the blade and spindle; if unbalanced, balance the blade. A damaged, dull, or bent cutting blade can also cause vibration, so replace the blade if necessary. Lastly, loose hardware can contribute to vibration, so tighten all nuts and bolts.

Craftsman 12A-764M799 Specifications

General

Brand	Craftsman
Model	12A-764M799
Category	Lawn Mower
Language	English

Summary

Warranty Statement

Craftsman Two Year Limited Warranty

Details the warranty terms for defects in material and workmanship within two years.

Repair Protection Agreements

Offers optional protection against unexpected repair costs and hassle.

Product Specifications

Safety Instructions

Your Responsibility

Outlines the operator's duty to read and understand warnings and instructions.

Child Safety

Details precautions to prevent accidents involving children during mower operation.

General Operation Safety

Covers essential safety rules for operating the mower, including handling and inspection.

Safety Instructions

Slope Operation Safety

Provides guidelines and warnings for safe operation on slopes.

Service and Maintenance

Safe Handling Of Gasoline

Covers precautions for storing and using gasoline to prevent fire hazards.

General Service Recommendations

Offers general advice for maintaining the mower and its components.

Slope Guide

Safety Labels

Assembly

Loose Parts in Carton

Lists the components included in the packaging bag for the mower.

Tools Needed for Assembly

Specifies the tools required to assemble the lawn mower.

Removing Unit from Crate

Step-by-step guide to safely remove the mower from its shipping crate.

Assembling the Handle

Instructions for attaching and securing the mower handle.

Removing the Chute Holder

Details the procedure for removing the chute holder before operation.

Assembly

Installing the Gear Shift Lever

Step-by-step instructions for installing the gear shift lever.

Final Adjustments: Rear Tire Pressure

Guidance on checking and maintaining correct rear tire pressure for optimal mowing.

Know Your Mower

Throttle/Choke Control Lever

Explains the function and operation of the throttle/choke control lever.

Deck Height Lever

Describes how to adjust the cutting height using the deck height lever.

Gas Cap and Fueling

Information on accessing and using the gas cap for refueling.

Know Your Mower

Blade Control

Explains how to engage and disengage the mower blades.

Drive Control

Details how to engage and disengage the mower's drive system.

Engine Controls Overview

Identifies and briefly describes key engine control components.

Operation

Gas and Oil Fill-Up

Instructions for filling the fuel tank and checking engine oil level.

Starting the Mower

Step-by-step guide on how to safely start the mower engine.

Operation

Using the Mower

How to propel the mower and engage the cutting blades.

Stopping the Mower

Procedures for safely stopping the mower and its blades.

Moving Mower Without Engine Power

How to manually move the mower when the engine is off.

Mulching or Side-Discharge

Instructions for using the mulch plug for different discharge options.

Service and Maintenance

General Recommendations

Overall advice for performing maintenance and ensuring warranty validity.

Engine Maintenance: Spark Plug

Guide to inspecting, cleaning, and replacing the spark plug.

Servicing the Air Cleaner

Steps for cleaning or replacing the air cleaner cartridge.

Service and Maintenance

Changing the Engine Oil

Detailed instructions for draining and refilling the engine oil.

Service and Maintenance

Removing the Belt Cover

Steps to remove the belt cover for maintenance access.

Removing the Mower Deck

Procedures for detaching the mower deck for servicing.

Service and Maintenance

Lubrication Points

Guide to lubricating pivot points, wheels, and bearings.

Cleaning the Engine and Deck

Instructions for cleaning the engine and using the deck wash system.

Service and Maintenance

Rear Tire Pressure

Details on recommended rear tire pressure and maintenance.

Replacing the Trailing Shield

Steps for removing and installing the trailing shield.

Service and Maintenance

Servicing the Cutting Blades

Procedures for removing, sharpening, and installing mower blades.

Service and Maintenance

Replacing Belts

Instructions for replacing the drive and deck engagement belts.

Service and Maintenance

Replacing the Blade Timing Belt

Steps for replacing the blade timing belt.

Service and Maintenance

Maintenance Schedule

A table outlining recommended maintenance tasks and intervals.

Off-Season Storage

Preparing the Engine for Storage

Steps to prepare the engine for long-term storage.

Preparing the Lawn Mower for Storage

Recommendations for storing the mower to prevent rust and damage.

Accessories and Attachments

Troubleshooting

Notes

Mower Parts

Mower Parts Diagram 1

Exploded view of mower components with reference numbers.

Mower Parts List

Detailed list of mower parts and their corresponding numbers.

Mower Parts Diagram 2

Second exploded view of mower components with reference numbers.

Mower Parts List Continued

Continuation of the mower parts list with part numbers.

Engine Parts

Engine Components Diagram 1

Diagram of various engine parts with reference numbers.

Engine Components Diagram 2

Another diagram showing engine parts and their corresponding reference numbers.

Engine Components Diagram 3

Diagram illustrating more engine parts and their reference numbers.

Engine Components Diagram 4

Diagram showing additional engine parts and their reference numbers.

Engine Parts List Details

Comprehensive list of engine parts with part numbers and descriptions.

Engine Parts List Details Continued

Continuation of the engine parts list with part numbers and descriptions.

Transmission Parts

Transmission Parts Diagram

Exploded view of the transmission components with reference numbers.

Transmission Parts List

Detailed list of transmission parts and their corresponding numbers.

Emission Control System Warranty

Warranty Statement Overview

Explains emission control warranty coverage for Sears engines.

Owner's Warranty Responsibilities

Outlines the owner's duties regarding maintenance and presenting the engine for service.

Warranty Provisions

Details specific terms, coverage, and exclusions of the emission control warranty.

Emissions Label Information

Service and Support

In-Home Repair Services

Information on scheduling in-home repairs for appliances and systems.

Carry-In Repair Services

Details on finding and using local Sears Parts & Repair Service Centers.

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Craftsman 12A-764M799 User Manual

Table of Contents

Questions and Answers:

Craftsman 12A-764M799 Specifications

Summary

Warranty Statement

Craftsman Two Year Limited Warranty

Repair Protection Agreements

Product Specifications

Safety Instructions

Your Responsibility

Child Safety

General Operation Safety

Safety Instructions

Slope Operation Safety

Service and Maintenance

Safe Handling Of Gasoline

General Service Recommendations

Slope Guide

Safety Labels

Assembly

Loose Parts in Carton

Tools Needed for Assembly

Removing Unit from Crate

Assembling the Handle

Removing the Chute Holder

Assembly

Installing the Gear Shift Lever

Final Adjustments: Rear Tire Pressure

Know Your Mower

Throttle/Choke Control Lever

Deck Height Lever

Gas Cap and Fueling

Know Your Mower

Blade Control

Drive Control

Engine Controls Overview

Operation

Gas and Oil Fill-Up

Starting the Mower

Operation

Using the Mower

Stopping the Mower

Moving Mower Without Engine Power

Mulching or Side-Discharge

Service and Maintenance

General Recommendations

Engine Maintenance: Spark Plug

Servicing the Air Cleaner

Service and Maintenance

Changing the Engine Oil

Service and Maintenance

Removing the Belt Cover

Removing the Mower Deck

Service and Maintenance

Lubrication Points

Cleaning the Engine and Deck

Service and Maintenance

Rear Tire Pressure

Replacing the Trailing Shield

Service and Maintenance

Servicing the Cutting Blades

Service and Maintenance

Replacing Belts

Service and Maintenance

Replacing the Blade Timing Belt

Service and Maintenance

Maintenance Schedule

Off-Season Storage

Preparing the Engine for Storage

Preparing the Lawn Mower for Storage

Accessories and Attachments

Troubleshooting

Notes

Mower Parts

Mower Parts Diagram 1

Mower Parts List

Mower Parts Diagram 2

Mower Parts List Continued

Engine Parts