The Stihl MS 170 is a popular, lightweight chainsaw, frequently detailed in user manuals and online guides.
German-language resources offer comprehensive instructions,
including safety and maintenance, readily available as downloadable PDFs.
Overview of the MS 170 Model
The Stihl MS 170 is a gasoline-powered chainsaw designed for homeowner use, noted for its compact build and ease of handling. Numerous user manuals, often available in PDF format, detail its operation.
These guides, including German versions, emphasize safety precautions and proper maintenance. The MS 170 is frequently discussed in online forums regarding issues like stalling or difficulty starting, often linked to carburetor problems or fuel system concerns. It’s a common model covered in service documentation.
Key Features and Specifications
The Stihl MS 170 boasts a 35.2 cc displacement engine and a power output of 1.4 kW (1.9 hp). User manuals highlight its single-lever anti-vibration system for comfortable operation. Key specs include a bar length typically ranging from 14 to 16 inches. Documentation details carburetor adjustments, crucial for addressing issues like stalling or rough running. Service manuals provide internal combustion engine schematics, aiding in repairs and maintenance procedures.
Safety Precautions
User manuals emphasize comprehensive safety guidelines, including required personal protective equipment (PPE). Detailed instructions cover safe handling, kickback prevention, and understanding potential hazards during operation.
Personal Protective Equipment (PPE)
Stihl MS 170 manuals consistently stress the absolute necessity of wearing appropriate Personal Protective Equipment (PPE) during operation. This includes, without exception, a properly fitted helmet, impact-resistant eye protection – such as safety glasses or a face shield – and hearing protection to mitigate noise exposure.
Robust, cut-resistant gloves are vital for hand protection, alongside sturdy work boots offering ankle support. Leg protection, specifically chainsaw chaps or trousers, is crucial to defend against accidental contact with the moving chain. Always inspect PPE for damage before each use, ensuring full functionality and a secure fit.
Safe Handling Practices
Stihl MS 170 user manuals emphasize maintaining a firm grip with both hands at all times during operation. Always keep a secure stance and be aware of your surroundings, ensuring sufficient space for maneuvering. Never operate the chainsaw with one hand or attempt to reach excessively.
Before starting, inspect the chain for sharpness and proper tension. Avoid cutting above shoulder height and be mindful of hidden obstacles. Transport the chainsaw with the chain brake engaged and the guide bar covered.
Kickback Prevention
Stihl MS 170 manuals strongly warn about kickback, a sudden, forceful upward or backward movement of the chainsaw. To minimize risk, avoid using the upper quadrant of the guide bar’s tip. Maintain a firm grip and stand slightly to the side of the cutting plane.
Keep the chain properly sharpened and tensioned. Never cut with a dull chain. Be acutely aware of potential kickback zones, like when boring or felling. Utilize the chain brake and always maintain control.
Assembly and Initial Setup
Stihl MS 170 setup involves attaching the guide bar and chain, ensuring correct tension, and preparing the fuel mixture as detailed in the manual.
Attaching the Guide Bar and Chain
Proper installation is crucial for safe operation. Begin by removing the bar cover. Then, position the chain onto the guide bar, ensuring the cutting edges face the correct direction. Align the drive links with the bar’s drive links. Carefully fit the guide bar onto the chainsaw’s mounting studs, followed by the bar nut.
Do not fully tighten the bar nut initially; allow for chain adjustment. Refer to the user manual for detailed diagrams and specific instructions regarding chain and bar compatibility for your MS 170 model.
Chain Tensioning
Correct chain tension is vital for efficient cutting and preventing premature wear. With the bar attached, adjust the chain tension using the tensioning screw located on the chainsaw. The chain should be snug against the bar, but still able to be pulled around by hand.
A properly tensioned chain will not sag or bind on the bar. Regularly check and adjust tension, especially during initial use. Consult the user manual for specific tensioning guidelines and illustrations for the MS 170.
Fuel Mixing and Filling
The Stihl MS 170 requires a precise fuel mixture of gasoline and a high-quality 2-stroke engine oil. Refer to your user manual for the correct mixing ratio, typically 50:1.
Always use fresh fuel and thoroughly mix it in a dedicated fuel container. Carefully pour the mixture into the chainsaw’s fuel tank, avoiding spillage. Ensure the fuel cap is securely tightened before operation to prevent leaks and maintain optimal engine performance.
Operating Instructions
Proper operation of the MS 170 demands adherence to the user manual’s guidelines. Starting, cutting techniques, and idle speed adjustments are crucial for safe, efficient use.
Starting the Chainsaw
Before starting, ensure the chainsaw is on a firm, level surface and the chain brake is engaged. Confirm proper fuel mixture and sufficient fuel levels. Engage the choke for cold starts, following the user manual’s specific instructions.
Gently pull the starter cord with a smooth, controlled motion. Avoid jerking the cord, which can damage the starter mechanism. Once the engine sputters, disengage the choke and continue pulling until the engine starts. Allow the engine to warm up before use.
Proper Cutting Techniques
Always maintain a firm grip with both hands on the chainsaw, keeping your body balanced. Utilize the lower portion of the guide bar for controlled cuts, avoiding pinching. Never overreach or cut above shoulder height.
Be mindful of kickback, a sudden, dangerous reaction. Let the chain do the work, applying gentle pressure. Avoid forcing the saw, which can lead to loss of control. Plan your cuts and clear the work area of obstructions.
Idle Speed Adjustment
Adjusting the idle speed is crucial for smooth operation. Locate the idle speed screw, typically near the carburetor. Turn it clockwise to increase and counterclockwise to decrease the engine’s idling RPM.
A properly adjusted idle prevents stalling and ensures easy starting. Refer to the user manual for specific RPM settings. Observe the chain’s movement; it should not move at idle. Fine-tune the screw until the engine runs consistently without stalling.
Maintenance and Servicing
Regular maintenance, detailed in the Stihl MS 170 manual, is vital. This includes cleaning the air filter, replacing the spark plug, and sharpening the chain for optimal performance.
Air Filter Cleaning
Maintaining a clean air filter is crucial for the Stihl MS 170’s engine health, as outlined in the user manual. A dirty filter restricts airflow, reducing power and potentially causing damage. Regularly inspect the filter—more frequently in dusty conditions. Remove the filter cover and gently clean the filter element with warm, soapy water.
Allow it to dry completely before re-installing. Some manuals suggest lightly oiling foam filters; however, paper filters should remain dry. Proper air filter maintenance ensures efficient engine operation and prolongs the chainsaw’s lifespan, preventing costly repairs.
Spark Plug Replacement
The Stihl MS 170’s spark plug requires periodic replacement, detailed in the user manual, to maintain optimal ignition. Before removal, ensure the engine is cool. Use a spark plug wrench to carefully unscrew the old plug, noting its condition for diagnostic clues. Gap the new spark plug according to the manual’s specifications—typically 0.5mm.
Securely tighten the new plug, avoiding over-tightening. A faulty spark plug can cause starting difficulties or engine misfires. Regular replacement, as per the manual, ensures reliable engine performance and extends the chainsaw’s operational life.
Chain Sharpening
Maintaining a sharp chain is crucial for safe and efficient cutting with the Stihl MS 170, as outlined in the user manual. Use a round file of the correct size, guided by a sharpening guide, to restore the cutting angles of each tooth. Ensure consistent filing to maintain uniform length.
Proper sharpening improves cutting performance and reduces strain on the engine. A dull chain requires more force, increasing kickback risk. Refer to the manual for detailed instructions and recommended filing angles for optimal results and safety.
Troubleshooting Common Issues
User manuals detail solutions for problems like starting failures or stalling. Common causes include dirty carburetors, fouled spark plugs, or incorrect fuel mixtures, requiring attention.
Engine Won’t Start
If the engine fails to start, consult the user manual for systematic troubleshooting. First, verify the fuel tank contains a proper fuel-oil mixture.
Next, inspect the spark plug for fouling and replace if necessary. A clogged carburetor, as noted in user forums, is a frequent culprit; cleaning may be required.
Ensure the choke is engaged correctly during cold starts.
Finally, confirm the ignition system is functioning as described in the manual.
Engine Stalling
Frequent engine stalling often points to carburetor issues, as discussed in online Stihl forums. A dirty carburetor or incorrect high/low speed screw settings can disrupt fuel flow.
Check the air filter for obstructions, restricting airflow.
Fuel quality is crucial; stale fuel can cause stalling.
Inspect the spark plug and ensure proper gap. Refer to the user manual for detailed adjustment procedures and troubleshooting steps.
Chain Runs Roughly
A rough-running chain frequently indicates inadequate chain lubrication or improper tension. Ensure the chain oiler is functioning correctly and the reservoir is full.
Verify correct chain tension; a loose chain will vibrate excessively.
A dull chain also causes rough operation, requiring sharpening.
Inspect the guide bar for damage or wear. Consult the user manual for detailed chain maintenance and adjustment instructions.
Carburetor Adjustment
Adjusting the carburetor involves locating the high and low-speed screws, detailed in the manual. Precise settings are crucial for optimal performance and efficient fuel usage.
Identifying High and Low Speed Screws
Locating the carburetor adjustment screws on the Stihl MS 170 is essential for proper tuning. The low-speed screw, often marked “T” or “L”, controls the fuel-air mixture at idle and low engine speeds; It’s typically smaller and recessed. The high-speed screw, labeled “H”, manages the mixture at higher RPMs and is usually larger and more accessible.
Refer to your MS 170’s user manual for a precise diagram, as screw positions can vary slightly. Incorrect identification can lead to improper adjustments and poor engine performance. Careful observation and the manual’s guidance are key.
Adjusting the Carburetor
Carburetor adjustment on the Stihl MS 170 requires a methodical approach. Begin with the engine warm. Gently turn the low-speed screw until the engine idles smoothly without stalling. Next, adjust the high-speed screw for optimal performance under load – listen for a clean, responsive engine sound.
Small adjustments are crucial; typically ¼ turn increments. Avoid excessive turning. If issues persist, consult the user manual or a qualified technician. Incorrect settings can damage the engine.
Symptoms of Incorrect Carburetor Settings
Incorrect carburetor settings on the Stihl MS 170 manifest in several ways. Engine stalling, particularly at idle, is a common indicator. Difficulty starting, or requiring excessive choking, also suggests a problem. A rough-running engine lacking power, or black smoke from the exhaust, points to a rich mixture.
Conversely, a lean mixture can cause overheating. Addressing these symptoms promptly, using the manual’s guidance, prevents potential engine damage and ensures optimal performance.
Fuel System Maintenance
Regular fuel system care, detailed in the Stihl MS 170 manual, involves filter replacement and carburetor cleaning.
This prevents fuel-related issues and ensures reliable engine operation.
Fuel Filter Replacement
Maintaining a clean fuel filter is crucial for optimal Stihl MS 170 performance, as outlined in the user manual. Locate the filter within the fuel tank, typically accessed by removing the fuel tank cap. Carefully extract the old filter and replace it with a new, genuine Stihl replacement part.
Ensure a secure fit to prevent fuel leaks and maintain proper fuel flow. A clogged filter restricts fuel delivery, leading to starting difficulties or engine stalling. Regular replacement, as recommended in the manual, safeguards engine health and prolongs chainsaw life.
Cleaning the Carburetor
A dirty carburetor is a common cause of Stihl MS 170 engine issues, detailed in the user manual. Disassemble the carburetor carefully, noting the position of all parts. Use carburetor cleaner to thoroughly remove varnish and debris from all passages and jets.
Compressed air can help clear stubborn blockages. Reassemble with new gaskets if necessary, ensuring proper seating of all components. A clean carburetor ensures correct fuel-air mixture, restoring optimal engine performance and easy starting;
Chain and Bar Maintenance
Regular chain oiling and bar rail upkeep, as outlined in the manual, are crucial. Proper lubrication minimizes friction, extends chain life, and ensures smooth, efficient cutting.
Chain Oiling
Consistent chain lubrication is paramount for optimal performance and longevity of your Stihl MS 170. The user manual emphasizes checking the oil level frequently before and during operation.
Utilize Stihl’s recommended chain oil, or a high-quality bio-based alternative, for superior lubrication.
Insufficient oil leads to increased friction, premature wear, and potential damage to both the chain and bar.
Automatic oilers are standard, but manual oiling may be necessary in certain conditions.
Always ensure adequate oil flow for safe and efficient cutting.
Bar Rail Maintenance
Maintaining the guide bar rails is crucial for smooth chain operation and preventing binding. The Stihl MS 170 user manual details regular cleaning and burr removal.
Periodically inspect the rails for wear and damage, filing down any sharp edges.
Keep the bar groove free of sawdust and debris to ensure proper oil flow.
A worn or damaged bar necessitates replacement to avoid chain damage and unsafe operation.
Proper rail maintenance extends the life of both the bar and chain, maximizing cutting efficiency.
Storage and Transportation
Long-term storage requires draining fuel and cleaning the chainsaw, as detailed in the Stihl MS 170 manual.
Securely transport it with a scabbard, following safety guidelines.
Long-Term Storage Procedures
Preparing your Stihl MS 170 for extended storage is crucial for maintaining its functionality. Thoroughly drain the fuel tank and carburetor to prevent gumming and corrosion, as outlined in the user manual. Clean the chainsaw completely, removing sawdust and debris.
Inspect and lubricate the chain and guide bar; Store the chainsaw in a dry, secure location, protected from dust and extreme temperatures. Consider using a protective sheath over the bar and chain. Disconnect the spark plug wire for added safety during storage.
Safe Transportation Guidelines
Transporting your Stihl MS 170 requires careful attention to safety. Always engage the chain brake and ensure the engine is completely cool before moving the chainsaw. Utilize a scabbard to cover the chain and bar, preventing accidental contact.
Secure the chainsaw properly in a vehicle, preventing shifting during transit. Never transport a running chainsaw. Refer to the user manual for specific recommendations regarding vehicle placement and securing methods, prioritizing safety for yourself and others.
Technical Specifications
The MS 170’s detailed specifications, including engine displacement and weight, are found within the user manual and parts lists.
These documents provide crucial technical data for operation.
Detailed Technical Data
The Stihl MS 170 boasts a 35.2 cc displacement engine, delivering 1.5 kW (2.0 hp) of power; Its weight is approximately 4.9 kg (10.8 lbs) without a guide bar or chain. The fuel tank capacity is 0.25 liters, and the oil tank holds 0.18 liters.
Chain pitch options include 3/8” P, and recommended bar lengths range from 30 to 40 cm (12 to 16 inches). The manual details these specifications, alongside sound power levels and vibration data, crucial for informed operation and maintenance.
Parts List Overview
The Stihl MS 170 user manual includes a detailed exploded view diagram identifying numerous components. Key parts listed encompass the cylinder, piston, crankshaft, connecting rod, and various gaskets and seals. It also details the carburetor, ignition system, and fuel delivery components.
Furthermore, the manual illustrates the chain, guide bar, sprocket, and clutch assembly. Part numbers are often referenced, facilitating accurate ordering of replacements for servicing and repairs, ensuring longevity of the chainsaw.
Warranty Information
The Stihl MS 170 user manual outlines warranty coverage details and claim procedures. It specifies the duration of the warranty and what defects are covered, ensuring customer satisfaction.
Coverage Details
Stihl’s warranty for the MS 170 chainsaw, as detailed in the user manual, typically covers defects in materials and workmanship under normal use. This coverage extends for a specified period from the original date of purchase, often differing based on the user – commercial versus private.
The warranty doesn’t cover items subject to wear and tear, such as the chain and bar, or damage resulting from improper maintenance, misuse, or modifications. Proper adherence to the manual’s guidelines is crucial for valid warranty claims.
Claim Procedures
To initiate a warranty claim for your Stihl MS 170, as outlined in the user manual, you must first contact an authorized Stihl dealer. They will assess the issue and determine if it’s covered under warranty terms.
You’ll likely need to provide proof of purchase, the chainsaw’s serial number, and a detailed description of the defect. The dealer will then guide you through the repair or replacement process, adhering to Stihl’s established claim protocols.
Frequently Asked Questions (FAQ)
Common queries often involve starting issues, stalling, or rough running. Users seek guidance on carburetor adjustments and troubleshooting steps, found in manuals.
Common User Queries
Frequently asked questions center around engine problems – specifically, why the MS 170 won’t start or stalls shortly after ignition. Many users inquire about carburetor cleaning and adjustment, seeking initial screw settings after disassembly. Others report rough engine operation and ask about chain sharpening techniques.
Concerns also arise regarding fuel mixture ratios and proper chain tensioning. Online forums reveal repeated questions about kickback prevention and the correct use of personal protective equipment, highlighting the importance of the user manual’s safety section.
Troubleshooting Tips
If the engine fails to start, check the spark plug and fuel supply first. A frequently reported issue involves a clogged carburetor, requiring thorough cleaning. For stalling, verify the fuel mixture and air filter cleanliness. Rough running often indicates a dull chain or improper tension.
Consult the user manual for detailed diagrams and procedures. Online discussions suggest carefully examining fuel lines for obstructions and ensuring correct carburetor settings, as incorrect adjustments can exacerbate starting and running problems.