Craftsman Model 917.370 Manual: A Comprehensive Guide
This guide provides detailed instructions for the Craftsman 917.370 gas walk-behind mower, referencing parts and manuals available at Sears Parts Direct for optimal performance.
The Craftsman 917.370 is a popular gas-powered walk-behind mower designed for residential lawn care. This manual serves as a comprehensive resource for owners, offering guidance on assembly, operation, maintenance, and troubleshooting. Understanding your mower is key to safe and efficient operation, ensuring a beautifully maintained lawn for years to come.
Sears Parts Direct provides valuable resources, including downloadable manuals and readily available replacement parts, specifically for this model. Whether you’re a seasoned homeowner or a first-time mower user, this guide will empower you to confidently handle all aspects of your Craftsman 917.370. Proper use and regular maintenance, as outlined within, will maximize the mower’s lifespan and performance.

Safety Precautions & Warnings
Prior to operating the Craftsman 917.370 mower, carefully review all safety precautions. Always disconnect the spark plug wire before performing any maintenance or adjustments to prevent accidental starting. Keep children and pets well clear of the mowing area during operation.
Wear appropriate safety gear, including eye protection and sturdy footwear. Never operate the mower with missing or damaged safety shields. Be mindful of potential hazards in the lawn, such as rocks or debris, which could become projectiles. Always shut off the engine and allow it to cool completely before storing or transporting the mower. Refer to the full manual available at Sears Parts Direct for a complete list of safety guidelines.
Understanding the Mower Components
The Craftsman 917.370 mower comprises several key components working in unison. The engine provides the power, while the deck and blade assembly facilitate cutting. Control handles manage steering and operational functions. Familiarizing yourself with these parts, detailed in resources like Sears Parts Direct, is crucial.
The deck houses the blade, determining the cut quality. Control cables connect the handles to the engine and braking systems. Understanding the interplay between these elements ensures safe and efficient operation. Proper identification of each component aids in maintenance and repair, allowing for informed troubleshooting and parts replacement when needed.
Engine Overview & Specifications
The Craftsman 917.370 utilizes a gasoline-powered engine, designed for reliable performance in residential lawn care. Specific engine details, including horsepower and displacement, can be found through Sears Parts Direct resources. It’s a single-cylinder engine typically featuring a recoil start mechanism for easy ignition.
Key specifications include the fuel capacity, oil type requirements, and recommended operating speed. Understanding these parameters is vital for optimal engine longevity and efficiency. Regular maintenance, such as oil changes and air filter cleaning, directly impacts engine performance. Refer to the manual for precise specifications and maintenance schedules to ensure consistent operation.

Deck & Blade Assembly
The Craftsman 917.370 features a durable deck housing the blade assembly, responsible for cutting the grass. The deck is typically constructed from stamped steel, offering a balance of strength and weight. Blade length and type are crucial for achieving a clean and even cut, with Sears Parts Direct providing replacement options.
Proper blade installation and maintenance are essential for safety and performance. Ensure the blade is securely fastened with the correct hardware and sharpened regularly. Inspect the deck for damage, such as dents or cracks, before each use. Maintaining a clean underside of the deck prevents grass buildup and ensures efficient operation.
Control Handles & Operator Controls
The Craftsman 917.370 utilizes ergonomic control handles designed for comfortable operation. These handles house essential operator controls, including the throttle, blade engagement lever, and potentially a self-propelled drive control. Familiarize yourself with the function of each control before operating the mower.
Safety features, such as a blade brake and operator presence control, are integrated into the handle assembly. These features are designed to prevent accidental engagement and ensure safe operation. Regularly inspect the control cables for wear and tear, and adjust them as needed for smooth and responsive control. Proper handle adjustment contributes to user comfort and control.
Assembly Instructions
Before operating your Craftsman 917.370, careful assembly is crucial for safe and efficient mowing. Refer to the detailed diagrams available through Sears Parts Direct to ensure correct component placement. Initial steps involve attaching the handle to the mower deck, securing it with provided bolts and washers.
Next, install the blade, ensuring it’s properly aligned and tightened to the correct torque specification. Connecting the control cables is vital; verify smooth operation of the throttle and blade engagement. Double-check all connections before the first use. Proper assembly guarantees optimal performance and longevity of your mower.
Attaching the Handle
Begin by aligning the handle assembly with the designated mounting points on the mower deck. Utilize the bolts, washers, and nuts provided in the hardware kit – referencing Sears Parts Direct diagrams for correct parts identification. Ensure the handle is securely fastened, tightening bolts in a crisscross pattern to distribute pressure evenly.
Proper handle attachment is critical for operator control and safety. Verify the handle grips are firmly in place and that all cables move freely without obstruction. Double-check all fasteners for tightness before proceeding to the next assembly step. A securely attached handle provides a comfortable and safe mowing experience.

Installing the Blade
Before blade installation, disconnect the spark plug wire for safety – a crucial step! Position the blade with the cutting edge facing upwards. Align the blade with the spindle and secure it using the blade bolt. Consult Sears Parts Direct for the correct torque specification for the blade bolt.
Always use a torque wrench to ensure proper tightening. Incorrect torque can lead to blade loosening or damage to the spindle. After tightening, visually inspect the blade for proper seating. A correctly installed blade is essential for a clean and safe cut, maximizing mowing performance.
Connecting Control Cables

Begin by identifying the throttle and brake control cables. Attach the throttle cable to the throttle lever on the engine, ensuring smooth operation. Connect the brake cable to the brake arm, verifying proper engagement and disengagement; Refer to diagrams available on Sears Parts Direct for precise cable routing.

Adjust cable tension as needed for responsive control. Too much tension can cause the engine to race, while too little tension may result in sluggish response. Securely fasten the cables using the provided clips to prevent interference with moving parts. Double-check all connections before operating the mower.
Operating Instructions
Before each use, inspect the mowing area for obstacles and ensure a safe operating environment. Always wear appropriate safety gear, including eye protection and sturdy footwear. To start the engine, prime the carburetor, set the throttle to the start position, and engage the starter. Allow the engine to warm up before applying a load.
Adjust the cutting height using the designated lever, selecting the desired grass length. Overlap each mowing pass slightly for a clean, even cut. Avoid mowing wet grass, as it can clog the deck and reduce performance. Disengage the blade when crossing gravel or pavement.
Starting the Engine
Ensure the fuel tank is filled with fresh gasoline and the oil level is correct before attempting to start. Prime the carburetor by pressing the primer bulb several times until fuel is visible. Set the throttle control to the “Start” or “Choke” position, as indicated on the mower. Grasp the handle firmly and engage the blade control lever.
Pull the starter rope with a smooth, firm motion. Avoid pulling the rope to its full extent and allow it to retract slowly. If the engine doesn’t start after a few attempts, repeat the priming and starting procedure. Once started, gradually disengage the choke.
Adjusting Cutting Height
The Craftsman 917.370 features multiple cutting height positions, adjustable via levers located near each wheel. To raise the deck, move the levers backward, selecting a higher number. To lower the deck, move the levers forward, choosing a lower number. Ensure all four wheels are set to the same height setting for an even cut.
Start with a higher setting for initial mowing, especially in tall grass. Lower the cutting height gradually for subsequent passes, if desired. Avoid cutting more than one-third of the grass blade length at a time to maintain lawn health. Regularly check the height settings before each use.
Mowing Techniques & Best Practices
For optimal results with your Craftsman 917.370, overlap each mowing pass by a few inches. This prevents scalping and ensures a consistent cut. Mow in a straight line, turning when you reach the end of the lawn. Avoid sharp turns, which can damage the grass. Vary your mowing pattern each time to prevent soil compaction.

Mow when the grass is dry for a cleaner cut and to prevent clogging. Keep the blade sharp for healthy grass and efficient operation. Consider mulching grass clippings to return nutrients to the lawn. Regular mowing promotes a thicker, healthier turf.
Maintenance Schedule
Regular maintenance is crucial for the longevity of your Craftsman 917.370 mower. Check the oil level before each use and change it every 25 hours or annually, whichever comes first. Clean or replace the air filter every 25 hours to maintain engine performance. Inspect the spark plug annually and replace it if necessary.
Sharpen or replace the blade at least once a season, or more often if needed. Lubricate moving parts regularly. Inspect belts and cables for wear and tear. Keep the mower deck clean of debris. Following this schedule ensures reliable operation and extends the life of your mower.
Oil Change Procedures

Begin with a warm engine, but not hot, for easier oil flow. Disconnect the spark plug wire for safety. Locate the oil drain plug beneath the mower and position a drain pan. Remove the plug and allow the oil to drain completely. Reinstall the plug securely.
Remove the oil fill cap and slowly pour in the recommended oil type and quantity – typically around 15-20 ounces, check your manual. Avoid overfilling. Replace the fill cap. Dispose of the used oil responsibly at a recycling center. Reconnect the spark plug wire before starting the engine.
Air Filter Cleaning/Replacement
Locate the air filter housing, usually near the engine. Remove the cover to access the filter. Inspect the filter for dirt and debris. If the filter is lightly soiled, gently tap it to remove loose particles or use compressed air, blowing from the inside out.
For heavily soiled or damaged filters, replacement is necessary. Ensure the new filter is the correct type for your Craftsman 917.370. Install the clean or new filter, ensuring a proper seal. Reattach the air filter cover securely. Regular maintenance ensures optimal engine performance and longevity.
Spark Plug Inspection & Replacement
Disconnect the spark plug wire before any inspection. Remove the spark plug using a spark plug wrench. Inspect the plug for fouling, wear, or damage. A healthy plug will have a tan or gray color. If the plug is oily, black, or worn, replacement is required.
Gap the new spark plug to the manufacturer’s specification (refer to the engine specifications). Install the new spark plug, tightening it to the correct torque. Reconnect the spark plug wire securely. Regular spark plug maintenance ensures reliable engine starting and efficient operation.
Troubleshooting Common Issues

Facing issues with your Craftsman 917.370? This section addresses frequent problems. If the engine won’t start, check fuel levels, the spark plug, and ensure the safety bail is engaged. An uneven cut often indicates a dull or damaged blade; sharpen or replace it. Verify the deck is level for consistent results.
Excessive vibration can stem from a loose blade, unbalanced wheels, or engine issues. Inspect and tighten all components. Consult Sears Parts Direct for diagrams and replacement parts if needed. Always disconnect the spark plug before performing any maintenance or troubleshooting.
Engine Won’t Start
Experiencing a no-start condition with your Craftsman 917.370? First, ensure sufficient fuel in the tank and that the fuel shut-off valve is open. Check the spark plug for fouling or damage; clean or replace as necessary. Verify the spark plug wire is securely connected. Confirm the safety bail is fully engaged, as this activates the ignition system.
Inspect the air filter for obstructions, a clogged filter restricts airflow. If the engine still fails to start, examine the carburetor for potential issues. Refer to Sears Parts Direct for detailed diagrams and replacement parts to aid in diagnosis and repair.
Uneven Cut
An uneven cut with your Craftsman 917.370 often indicates blade issues. Inspect the blade for dullness, damage (nicks, bends), or improper installation. A dull blade tears grass instead of cutting cleanly. Ensure the blade is securely fastened with the correct torque specification. Check the deck for obstructions or buildup of grass clippings, which can affect airflow.

Verify the tires are inflated to the recommended pressure; uneven tire pressure causes an inconsistent cutting height. Adjust the cutting height to the desired setting and confirm all wheels are set to the same height. Consult Sears Parts Direct for replacement blades and deck components if needed.
Excessive Vibration
Significant vibration during operation of your Craftsman 917.370 suggests a mechanical imbalance. Begin by inspecting the blade; a bent or damaged blade is a common cause. Ensure the blade is properly balanced using a blade balancer – available at most hardware stores. Check the engine mounting bolts to confirm they are tight and secure; loose bolts contribute to vibration.
Inspect the deck for any loose components or damage. Verify the wheel assembly is secure and the wheels are properly attached. Refer to Sears Parts Direct for replacement engine mounts, blades, or deck parts if necessary. Ignoring excessive vibration can lead to further damage, so address it promptly.
Parts List & Diagrams (Referencing Sears Parts Direct)
Locating replacement parts for your Craftsman 917.370 is simplified through Sears Parts Direct (https://www.searspartsdirect.com/manual/3askpdeax5-000247/craftsman-917370770-gas-walk-behind-mower-parts). This online resource provides detailed exploded diagrams illustrating all mower components, from the engine to the deck assembly.
You can search by model number (917.370770) to access a comprehensive parts list. Diagrams clearly show part numbers, aiding in accurate ordering. Commonly replaced items like blades, belts, filters, and engine parts are readily available. Sears Parts Direct ensures you can maintain your mower with genuine Craftsman replacements, extending its lifespan and performance.
Warranty Information
Craftsman stands behind the quality of its products, including the 917.370 gas walk-behind mower. Specific warranty details depend on the date of purchase and retailer. Generally, Craftsman offers a limited warranty covering defects in materials and workmanship. This typically includes coverage for the engine and deck for a specified period.
To verify your warranty coverage, retain your original purchase receipt and refer to the warranty statement included with your mower. Sears Parts Direct may also offer resources to help determine your warranty status. Warranty service is usually performed through authorized Craftsman service centers. Proper maintenance, as outlined in this manual, is crucial for maintaining warranty validity.