Craftsman Weedwacker Manual: A Comprehensive Guide
This manual provides detailed instructions for Craftsman weedwackers, covering assembly, operation, maintenance, and troubleshooting for various gas and electric models.
Find model-specific information, parts diagrams, and safety precautions to ensure optimal performance and longevity of your Craftsman trimmer.
Craftsman weedwackers, also known as string trimmers, are popular choices for homeowners tackling yard maintenance. These tools efficiently cut grass, weeds, and overgrowth in areas inaccessible to lawnmowers.
From gas-powered models like the 316.794490 to modern V20 cordless options, Craftsman offers a diverse range to suit various needs. Understanding your specific model, locating the manual, and adhering to safety guidelines are crucial for effective and safe operation. Resources like Sears Parts Direct and eBay can aid in manual retrieval.

Understanding Model Numbers
Identifying your Craftsman weedwacker’s model number is the first step towards finding the correct manual and parts. This number, like 316.794490 or 316.740890, is typically located on a tag affixed to the trimmer’s engine housing.
Carefully inspect the housing, potentially cleaning it to reveal a worn tag. Decoding the number unlocks access to specific documentation, ensuring you have the right information for maintenance, repairs, and operation of your particular model.
Locating the Model Number Tag
The model number tag is securely attached to the housing that covers the engine of your Craftsman weedwacker. It’s designed to be durable and withstand cleaning, but can sometimes become obscured by dirt or debris.
Begin by thoroughly inspecting the engine housing, carefully looking for a tag. If the tag is difficult to find, gently clean the area with a damp cloth to reveal the imprinted number. This tag is crucial for accessing specific manuals and parts.
Decoding the Model Number (e.g., 316.794490)
The Craftsman model number, such as 316.794490, is a unique identifier for your specific weedwacker. This number is essential when searching for replacement parts, accessing the correct owner’s manual, or seeking troubleshooting assistance.
Each digit often corresponds to specific features or manufacturing details. Utilizing this number on websites like Toolservicenet.com or Sears Parts Direct ensures you receive compatible components and accurate documentation for your model.
Safety Precautions

Prioritize safety when operating your Craftsman weedwacker. Always read the manual before use and adhere to all safety rules. Keep bystanders, especially children and pets, a safe distance away during operation.
Wear appropriate protective gear, including eye protection, sturdy footwear, and long pants. Never operate the trimmer with missing parts or modifications. Disconnect the spark plug (gas models) before performing maintenance.
General Safety Rules
Inspect the area before operating, removing objects that could be thrown. Maintain a firm grip and balanced stance. Never operate the weedwacker while tired or under the influence. Avoid wet conditions and ensure adequate ventilation when using gas-powered models.
Be mindful of power lines and underground utilities. Never point the trimmer at yourself or others. Stop the engine before leaving the work area or making adjustments.
Protective Gear Recommendations
Always wear eye protection, such as safety glasses or a face shield, to prevent debris from causing injury. Wear sturdy footwear, preferably closed-toe shoes, for foot protection. Consider wearing long pants and sleeves to shield skin from flying objects and potential irritants.

Hearing protection is recommended during prolonged use. Gloves can enhance grip and protect hands. Ensure all protective gear fits properly and is in good condition before each use.
Assembly Instructions
Carefully unpack all components and verify against the parts list. Identify each part – handle, shield, trimmer head, and engine housing. Attach the handle securely to the engine housing, ensuring proper alignment and tightening all bolts. Next, install the shield, again confirming a snug and secure fit.
Double-check all connections before proceeding. Refer to the diagrams for correct placement. Improper assembly can lead to operational issues or safety hazards.
Component Identification
Key components include the engine housing, which protects the motor, and the trimmer head, where the cutting line resides. The handle provides control, while the shield safeguards against debris. Identify the fuel tank (gas models) and the battery compartment (electric models).
Familiarize yourself with the line feed mechanism and the various adjustment knobs. Understanding each part’s function is crucial for proper assembly and maintenance.
Attaching the Handle and Shield
Begin by aligning the handle components with the designated slots on the engine housing. Securely fasten them using the provided bolts and screws, ensuring a firm grip. Next, attach the shield, positioning it to deflect debris away from the user.
Tighten all fasteners to prevent loosening during operation. Proper attachment of the handle and shield is vital for both comfort and safety while trimming.
Operating Instructions
Before starting, ensure the trimmer head is clear of obstructions. For gas models, prime the engine, set the choke, and pull the starter cord firmly. Electric models require a charged battery and a simple power button press.
Maintain a firm grip and use smooth, sweeping motions while trimming. Avoid contact with hard surfaces to prevent line breakage and damage to the trimmer head.
Starting the Engine (Gas-Powered Models)
Prior to starting, verify the fuel tank is filled with the correct gas-oil mixture. Prime the engine by pressing the primer bulb several times until fuel is visible. Set the choke lever to the ‘start’ position.
Grip the starter handle firmly and pull the cord with a swift, controlled motion. Repeat as needed, gradually reducing choke once the engine sputters. Allow the engine to warm up before full operation.
Trimming Techniques
Maintain a consistent walking speed and a slight angle when trimming, using the line to cut grass and weeds. Avoid forcing the line into thick growth; let the trimmer do the work.
For edging, rotate the trimmer head and use the line to create clean, defined edges along sidewalks and driveways. Regularly check the line length and replace as needed for optimal cutting performance and efficiency.
Maintenance
Regular maintenance is crucial for a long-lasting Craftsman weedwacker. Gas-powered models require consistent fuel mixing with the correct oil ratio and spark plug checks. Electric models need battery care and charger inspections.
Essential tasks include cleaning the trimmer head, inspecting for damage, and promptly replacing the trimmer line; Proper storage during off-season periods will also extend the life of your tool.
Fueling and Oil Mixing (Gas-Powered Models)
Gas-powered Craftsman weedwackers necessitate a precise fuel-to-oil mixture for optimal engine performance. Typically, a 50:1 ratio of gasoline to 2-cycle engine oil is recommended, though always verify your specific model’s requirements.
Use fresh gasoline and high-quality 2-cycle oil. Thoroughly mix the fuel and oil in an approved container before adding it to the trimmer’s tank. Avoid spills and wipe up any immediately.
Line Replacement
Replacing the trimmer line is a routine maintenance task. First, disconnect the spark plug wire for safety. Locate the spool housing and remove it according to your model’s instructions. Unwind the old line and clean the spool thoroughly.

Attach the new line, ensuring it’s wound in the correct direction as indicated on the spool. Reassemble the housing and test the line feed mechanism. Use only recommended line diameter for optimal performance.
Troubleshooting Common Issues
Common problems include engine failure to start, often due to old fuel or a clogged carburetor. Line feed issues can stem from an empty spool, tangled line, or a faulty automatic feed mechanism. Inspect the spark plug, air filter, and fuel lines for obstructions.
Refer to the manual for specific diagnostic steps. If problems persist, consult a qualified technician. Always disconnect the spark plug before performing any repairs.
Engine Won’t Start
If the engine fails to start, first check the fuel level and ensure fresh fuel is being used. A clogged air filter or a fouled spark plug are frequent culprits; Verify the spark plug wire is securely connected. Prime the engine several times and attempt to start it again.
Inspect the carburetor for blockages. If issues continue, the recoil starter mechanism may be damaged, requiring professional repair. Always disconnect the spark plug before inspection.
Line Feed Problems
If the line isn’t feeding, check for tangled line within the spool. Ensure the spool is installed correctly and the line is wound tightly. For models with automatic feed, verify the automatic feed mechanism isn’t obstructed. Press the line feed button firmly while trimming.
Inspect the trimmer head for debris or damage. If the line breaks frequently, consider using a heavier gauge line. Proper line installation is crucial for consistent feeding.
Parts Diagrams and Identification
Accessing detailed parts diagrams is essential for repairs and maintenance. Toolservicenet.com provides comprehensive schematics for numerous Craftsman models, including the 316.740890. Sears Parts Direct also offers diagrams and parts lists.
Key components include the trimmer head, spool, engine (for gas models), and the handle assembly. Accurate identification of parts ensures you order the correct replacements, streamlining the repair process and maximizing efficiency.
Accessing Parts Lists (e.g., Toolservicenet.com)
Toolservicenet.com is a valuable resource for locating exploded views and comprehensive parts lists for Craftsman weedwackers. Simply enter your model number – such as 316.794490 – into the search bar to access specific diagrams.
These lists detail every component, including part numbers, descriptions, and often, pricing. Sears Parts Direct is another excellent option, offering similar functionality for identifying and ordering replacement parts efficiently;
Identifying Key Components
Essential components of a Craftsman weedwacker include the engine (gas models), motor (electric models), trimmer head, shaft, handle, and shield. The model number tag, affixed to the housing, is crucial for accurate part identification.
Familiarize yourself with the semi-automatic line feed system, found in models like 358.799080, and understand the function of the carburetor (gas models). Refer to parts diagrams to visually locate and name each part for maintenance or repair.
Warranty Information
Craftsman weedwackers are typically covered by a manufacturer’s warranty protecting against defects in materials and workmanship. Warranty duration varies by model, so review your purchase documentation carefully.
Registering your product at www.craftsman.com is essential to activate warranty coverage and receive important updates. Understand the limitations; warranties generally don’t cover misuse, normal wear, or damage from improper maintenance.
Understanding Warranty Coverage
Craftsman’s warranty generally covers defects in materials and workmanship for a specified period, often one to three years from the date of purchase. Coverage includes repair or replacement of defective parts, at Craftsman’s discretion.
However, the warranty excludes issues arising from misuse, neglect, improper maintenance, or normal wear and tear. Keep your proof of purchase; it’s required for all warranty claims. Review the full warranty details online or in your product manual.
Registering Your Product
Registering your Craftsman weedwacker online at www.craftsman;com offers several benefits. Registration confirms your ownership and allows Craftsman to notify you of important safety recalls or product updates.
It also streamlines the warranty claim process should you encounter any issues. Having your product registered demonstrates proof of purchase if your original receipt is lost. The registration process is quick and easy, requiring basic owner information and the model number.
Specific Model Information (316.794490)
Model 316.794490 is a gas-powered weedwacker, cautioned to be used only after reading the provided manual for safety and operational guidance; This model requires careful attention to fuel mixing and engine maintenance for optimal performance.
Parts lists and manuals are readily available online via Toolservicenet.com and Sears Parts Direct, aiding in repairs and upkeep. Regularly inspect the trimmer line and engine components for wear and tear.
Features of Model 316.794490
The 316.794490 model is a gas-powered trimmer designed for residential use, emphasizing ease of operation and reliability. It features a standard straight-shaft design, suitable for general trimming and edging tasks around lawns and gardens.
Users should note the importance of proper fuel mixture for optimal engine performance. This model’s durability is enhanced by a robust engine housing and a comfortable grip for extended use, ensuring user control.
Specific Maintenance for 316.794490

Regular maintenance for model 316.794490 includes consistent air filter cleaning and spark plug replacement to maintain optimal engine function. Proper fuel stabilization is crucial during storage to prevent carburetor issues. Inspect the trimmer line frequently, replacing it as needed to ensure efficient cutting.
Additionally, check for loose fasteners and lubricate moving parts to prolong the trimmer’s lifespan. Always disconnect the spark plug before performing any maintenance procedures for safety.
Specific Model Information (316.740890)
Model 316.740890 is a gas-powered line trimmer, appearing to be a 2017 design. Key features include a standard straight shaft configuration and a focus on reliable performance for residential use. Parts and manuals are readily available through resources like Toolservicenet.com and Sears Parts Direct.
Users should prioritize regular maintenance, including fuel stabilization and line replacement, to ensure longevity. Locating the original model number is vital for accurate parts ordering.

Features of Model 316.740890
The 316.740890 boasts a conventional gas engine powering a straight-shaft trimmer head. It’s designed for typical homeowner yard work, offering a balance of power and maneuverability. Essential features include a standard trigger throttle and often, an auto-feed line head for convenient line advancement.
This model prioritizes ease of use and affordability, making it a popular choice for basic trimming needs. Reliable performance is achieved through a straightforward design and readily available parts.
Specific Maintenance for 316.740890
Regular maintenance for model 316.740890 includes proper fuel mixing with a 50:1 ratio of gas and 2-cycle engine oil. Air filter cleaning after each use is crucial, alongside spark plug inspection. Periodically check and tighten all bolts and fasteners.
Line replacement is frequent, and the trimmer head should be inspected for debris. Ensure proper storage during off-season, draining fuel to prevent carburetor issues. Refer to Sears Parts Direct for specific parts.
Specific Model Information (358.799080)
Model 358.799080 is an electric trimmer operating at 120 Volts AC with 6.0 Amps, featuring a 16-inch cutting path. It utilizes 0.065-inch diameter twisted line with a semi-automatic line feed system.
Weighing 9.01 lbs, this model is designed for lighter-duty trimming. Regularly inspect the line feed head for obstructions and ensure the motor housing remains clean. Proper cord management is essential for safe operation.
Technical Specifications (Voltage, Amps, Cutting Path)
Model 358.799080 operates on a standard 120-volt AC power supply, drawing 6.0 Amps for efficient performance. The trimmer boasts a 16-inch cutting path, allowing for quick coverage of trimming areas.
These specifications indicate a trimmer suited for residential use, offering a balance between power and maneuverability. Always verify your power outlet matches the voltage requirements before operation.
Line Feed System Details
Model 358.799080 utilizes a semi-automatic line feed head, simplifying line advancement during operation. This system employs 0;065-inch diameter twisted line for effective trimming. Bump feeding is not required; the line advances with a simple push-button mechanism.
Ensure proper line tension and avoid overfeeding to maintain optimal cutting performance and prevent tangling. Regularly inspect the line for wear and replace as needed for continued efficiency.
Finding Manuals Online

Locating a Craftsman weedwacker manual is often achievable online. Sears Parts Direct (searspartsdirect.com) is a valuable resource, offering downloadable manuals using the model number. eBay can also be helpful, as listings sometimes include manual links or offer the physical manual itself.
Toolservicenet.com provides parts diagrams and manuals for specific models like 316.740890. Remember to have your weedwacker’s model number readily available for a successful search.
Sears Parts Direct Resources
Sears Parts Direct (searspartsdirect.com) is a premier online destination for Craftsman weedwacker manuals and parts. Users can easily search for manuals by entering the complete model number, such as 316.794490, into the search bar.
The website provides downloadable PDF versions of owner’s manuals, parts lists, and diagrams, facilitating repairs and maintenance. It’s a reliable source for comprehensive documentation, ensuring users have the information needed for their specific model.
eBay as a Resource for Model Numbers
eBay can surprisingly be a valuable resource when a Craftsman weedwacker’s model number tag is missing or illegible. Searching for “Craftsman weedwacker” often reveals listings with clear photos displaying the model number.
A link provided (https://www.ebay.com/itm/334808628363) demonstrates this, helping identify a model even with a worn-off tag. This allows users to then locate the correct manual and parts information online.
Electric Model Considerations
Craftsman’s V20 cordless weedwackers offer convenient, emission-free operation. These models feature a high-efficiency motor and are typically equipped with a 4.0 Ah battery for extended runtime. The push-button feed system provides controlled line advancement using 0.080-inch twisted line.
Proper battery and charger maintenance are crucial for optimal performance and longevity. Refer to the V20 system manual for specific charging instructions and battery care guidelines.

V20 Cordless Model Features

Craftsman V20 weedwackers boast a 13-inch cutting path, enhancing efficiency for various trimming tasks. The lightweight design minimizes user fatigue, while the adjustable handle and rotating head offer improved comfort and versatility. A semi-automatic line feed ensures consistent trimming performance.
These models are compatible with the entire Craftsman V20 battery system, providing cordless convenience and cost savings. Expect features like push-button line feed control for easy line advancement.
Battery and Charger Information
Craftsman V20 cordless weedwackers utilize a 20V MAX lithium-ion battery for reliable power. Battery capacity varies (typically 4.0Ah), influencing runtime. Always use a Craftsman-approved charger to prevent damage and ensure optimal battery life.
Charging times depend on battery capacity and charger amperage. Store batteries in a cool, dry place, away from extreme temperatures. Refer to the charger’s manual for specific instructions and safety guidelines regarding battery maintenance.
Additional Resources
For comprehensive support, visit the official Craftsman website (www.craftsman.com) for FAQs, parts lookup, and contact information. Sears Parts Direct offers detailed parts lists and manuals. Toolservicenet.com provides access to exploded views and repair guides.
Consider the Sears Craftsman Engine Analyzer for diagnosing issues with gas-powered models. eBay can be a valuable resource for locating model number tags or used manuals if yours is missing or illegible.
Craftsman Website (www.craftsman.com)
The official Craftsman website is a central hub for all your weedwacker needs. Here, you can register your product to activate warranty coverage and access exclusive offers. Download digital manuals, browse frequently asked questions, and locate authorized service centers.
Explore parts diagrams and order replacement components directly. The website also features helpful articles and videos on maintenance and troubleshooting, ensuring your trimmer operates efficiently.
Engine Analyzer Information
Sears Craftsman offered an Engine Analyzer specifically designed for 12 and 24-volt systems. This tool assists in diagnosing engine problems, helping users identify issues with ignition, fuel delivery, and compression. Owners manuals for the analyzer are available online, providing detailed instructions for its use.
While not directly related to weedwacker repair, the analyzer can be valuable for maintaining gas-powered models, ensuring optimal engine performance and extending the life of your Craftsman trimmer.
