Starting A Stihl MS250 Guide (7 Pro Tips For Reliable Ignition)

Starting a Stihl MS250 Guide: 7 Pro Tips for Reliable Ignition

Investment in Reliability: Why a Smooth Start Matters

As someone who’s spent countless hours in the woods, felling trees and processing firewood, I know firsthand the frustration of a chainsaw that just won’t start. It’s not just a waste of time; it’s a drain on energy, morale, and ultimately, your budget. A balky chainsaw on a cold morning can throw off an entire day’s work, costing you in lost productivity and potential project delays. Think of it this way: every pull of the starter cord that doesn’t result in ignition is money burning. That’s why a reliable starting procedure for your Stihl MS250 is an investment, plain and simple.

This guide isn’t just about getting your saw running; it’s about optimizing your workflow and ensuring your Stihl MS250 remains a dependable workhorse for years to come. I’ll share the pro tips I’ve learned over the years to ensure consistent and reliable ignition, minimizing downtime and maximizing your efficiency in the woods. I’ll also touch upon the cost implications of neglecting proper starting procedures and maintenance, showing you how preventative measures can save you money in the long run.

Understanding the Stihl MS250: A Brief Overview

The Stihl MS250 is a popular choice for homeowners and professionals alike, prized for its balance of power, weight, and affordability. It’s a mid-range chainsaw capable of handling a variety of tasks, from felling small trees to bucking firewood. However, like any piece of machinery, it requires proper care and maintenance to perform reliably. A critical aspect of this care is understanding the starting procedure.

Before diving into the pro tips, let’s briefly cover the essential components involved in starting the MS250:

Fuel System: This includes the fuel tank, fuel lines, fuel filter, carburetor, and fuel pump. The carburetor mixes air and fuel to create a combustible mixture.
Ignition System: This system generates the spark that ignites the fuel-air mixture in the cylinder. It consists of the spark plug, ignition coil, and flywheel.
Starting Mechanism: This includes the starter cord, recoil spring, and pawls that engage with the flywheel to turn the engine over.
Choke: Restricts airflow to enrich the fuel mixture for cold starts.
Master Control Lever (Ignition Switch): Controls the ignition and often includes a choke setting.

Pro Tip 1: Fresh Fuel is King (and Saves You Money)

The Problem: Stale fuel is the number one culprit behind starting problems in small engines. Gasoline degrades over time, especially when mixed with oil (as required for two-stroke engines like the MS250). This degradation leads to varnish and gum deposits in the carburetor, hindering fuel flow and making it difficult to start the saw.

My Experience: I learned this lesson the hard way. I once left a MS250 chainsaw sitting for a few months with fuel in the tank. When I went to start it, nothing. I spent hours cleaning the carburetor before I finally got it running. Now, I always drain the fuel tank and run the engine dry before storing the saw for extended periods.

The Solution:

Use Fresh Fuel: Always use fresh, high-quality gasoline with an octane rating of 89 or higher. Purchase only the amount of fuel you expect to use within a month or two.
Use Fuel Stabilizer: If you anticipate storing fuel for longer than a few weeks, add a fuel stabilizer to prevent degradation. Follow the manufacturer’s instructions for the correct dosage.
Proper Fuel Mixing: Accurately mix the fuel and oil according to Stihl’s recommendations. Using the wrong ratio can lead to engine damage. Stihl recommends a 50:1 mixture ratio (50 parts gasoline to 1 part oil) when using Stihl two-stroke engine oil. Using other oils may require different ratios, always check the oil manufacturer’s recommendations.
Empty the Fuel Tank: Before storing the saw for extended periods (e.g., over the winter), drain the fuel tank and run the engine until it stalls to remove any remaining fuel from the carburetor.

Cost Implications:

Carburetor Cleaning/Repair: A clogged carburetor can lead to costly repairs. Carburetor cleaning can range from $50 to $100, while a complete replacement can cost $100 to $200 or more, depending on the mechanic and location.
Lost Productivity: A chainsaw that won’t start means lost time and productivity. If you’re a professional logger, this can translate to significant financial losses.
Engine Damage: Using stale fuel can lead to engine damage, potentially requiring expensive repairs or even engine replacement.

Data Point: Studies have shown that gasoline can begin to degrade in as little as 30 days, especially when exposed to air and sunlight. Fuel stabilizers can extend the shelf life of gasoline by up to 12 months.

Pro Tip 2: Master the Cold Start Procedure (Step-by-Step)

The Problem: Many starting problems are caused by improper execution of the cold start procedure. Failing to follow the correct sequence can flood the engine, making it difficult to start.

My Experience: I’ve seen countless people struggle to start their chainsaws simply because they were pulling the cord incorrectly or not using the choke properly.

The Solution:

Engage the Chain Brake: Always engage the chain brake before starting the saw for safety.
Place the Saw on a Firm Surface: Ensure the saw is resting on a stable surface with the bar and chain clear of obstructions.
Activate the Choke: Move the master control lever to the choke position (usually indicated by a choke symbol). On the MS250, you will typically push the control lever all the way down.
Pull the Starter Cord: Pull the starter cord firmly and steadily until the engine sputters or attempts to start. Do not pull the cord all the way out, as this can damage the recoil mechanism. Usually 3-5 pulls.
Disengage the Choke: Once the engine sputters, move the master control lever to the half-choke position (if your model has one) or the run position. On the MS250 this usually means moving the control lever up one position from the full choke.
Pull the Starter Cord Again: Continue pulling the starter cord until the engine starts and runs smoothly.
Warm-Up: Allow the engine to warm up for a few minutes before applying full throttle.

Cost Implications:

Reduced Wear and Tear: Proper starting techniques minimize stress on the engine and starting mechanism, extending their lifespan and reducing the need for repairs.
Fuel Efficiency: A properly started engine runs more efficiently, saving you money on fuel costs.
Time Savings: Mastering the cold start procedure saves you time and frustration, allowing you to get to work quickly.

Data Point: According to Stihl service technicians, the majority of chainsaw starting problems are due to improper starting techniques or stale fuel.

Pro Tip 3: Spark Plug Inspection and Maintenance (A Simple Solution)

The Problem: A fouled or worn spark plug can prevent the engine from starting or running smoothly. Over time, the spark plug electrodes can become corroded or coated with carbon deposits, reducing the spark’s intensity and hindering ignition.

My Experience: I’ve been surprised how often a simple spark plug replacement can solve starting problems. I always keep a spare spark plug on hand in my toolkit.

The Solution:

Regular Inspection: Inspect the spark plug regularly for signs of wear, corrosion, or carbon deposits.
Cleaning: If the spark plug is fouled with carbon deposits, clean it with a wire brush or spark plug cleaner.
Gap Adjustment: Ensure the spark plug gap is set to the manufacturer’s specifications. The correct gap for the Stihl MS250 is typically around 0.020 inches (0.5 mm). Use a spark plug gap tool to adjust the gap.
Replacement: Replace the spark plug annually or more frequently if needed. A new spark plug is a relatively inexpensive investment that can significantly improve engine performance.

Cost Implications:

Inexpensive Repair: Replacing a spark plug is one of the cheapest and easiest chainsaw repairs. A new spark plug typically costs between $5 and $10.
Improved Performance: A clean and properly gapped spark plug ensures optimal engine performance and fuel efficiency.
Preventative Maintenance: Regular spark plug maintenance can prevent more serious engine problems down the road.

Data Point: A worn or fouled spark plug can reduce engine power by up to 10% and increase fuel consumption by up to 5%.

Pro Tip 4: Air Filter Maintenance: Let Your Engine Breathe

The Problem: A dirty air filter restricts airflow to the engine, leading to poor performance, reduced fuel efficiency, and starting problems. The MS250 engine needs a proper mixture of fuel and air to run correctly. A clogged air filter throws off this balance.

My Experience: I’ve worked in dusty conditions where the air filter needed cleaning after every use. Neglecting the air filter is a surefire way to shorten the life of your chainsaw.

The Solution:

Regular Cleaning: Clean the air filter regularly, especially when working in dusty or dirty conditions.
Cleaning Methods: Use compressed air or warm, soapy water to clean the air filter. Allow the filter to dry completely before reinstalling it.
Replacement: Replace the air filter annually or more frequently if it becomes damaged or excessively dirty.
Pre-Filter: Consider using a pre-filter to extend the life of the main air filter.

Cost Implications:

Reduced Fuel Consumption: A clean air filter ensures optimal engine performance and fuel efficiency.
Extended Engine Life: Proper air filter maintenance prevents dirt and debris from entering the engine, reducing wear and tear and extending its lifespan.
Inexpensive Maintenance: Air filter cleaning and replacement are relatively inexpensive maintenance tasks. Air filters typically cost between $5 and $15.

Data Point: A clogged air filter can reduce engine power by up to 20% and increase fuel consumption by up to 10%.

Pro Tip 5: Check Your Ignition Coil and Wiring (Troubleshooting the Spark)

The Problem: The ignition coil is responsible for generating the high-voltage spark that ignites the fuel-air mixture in the cylinder. If the ignition coil is faulty or the wiring is damaged, the engine may not start or run properly.

My Experience: I once had a chainsaw that would only start intermittently. After checking everything else, I discovered a loose wire on the ignition coil. A simple fix, but it took some troubleshooting to find.

The Solution:

Visual Inspection: Inspect the ignition coil and wiring for signs of damage, such as cracks, frayed wires, or loose connections.
Spark Test: Remove the spark plug and connect it to the spark plug wire. Hold the spark plug against the engine block and pull the starter cord. If the ignition coil is working properly, you should see a strong blue spark. Caution: Ensure you don’t touch the spark plug while doing this to avoid electric shock.
Continuity Test: Use a multimeter to test the continuity of the ignition coil and wiring.
Replacement: If the ignition coil is faulty, replace it with a new one.

Cost Implications:

Potentially Expensive Repair: Ignition coil replacement can be a more expensive repair, typically costing between $50 and $150, depending on the mechanic and location.
Engine Damage: A faulty ignition coil can lead to misfires and engine damage.

Data Point: A faulty ignition coil can cause a variety of engine problems, including hard starting, poor performance, and reduced fuel efficiency.

Pro Tip 6: Carburetor Adjustment: Fine-Tuning for Optimal Performance

The Problem: The carburetor is responsible for mixing air and fuel in the correct proportions. If the carburetor is not properly adjusted, the engine may not start or run smoothly.

My Experience: I’ve found that even slight adjustments to the carburetor can make a big difference in how the chainsaw starts and runs. However, it’s important to proceed with caution and make small adjustments at a time.

The Solution:

Idle Speed Adjustment: Adjust the idle speed screw to ensure the engine idles smoothly without stalling.
High-Speed Adjustment: Adjust the high-speed screw to optimize engine performance at full throttle. Caution: Over-adjusting the high-speed screw can damage the engine.
Professional Adjustment: If you’re not comfortable adjusting the carburetor yourself, take the saw to a qualified technician.

Cost Implications:

Potential for Damage: Improper carburetor adjustment can lead to engine damage.
Improved Performance: Proper carburetor adjustment ensures optimal engine performance and fuel efficiency.
Technician Fees: Carburetor adjustment by a qualified technician typically costs between $30 and $75.

Data Point: A properly adjusted carburetor can improve fuel efficiency by up to 15% and increase engine power by up to 10%.

Pro Tip 7: Regular Maintenance: The Cornerstone of Reliability

The Problem: Neglecting regular maintenance is a surefire way to shorten the life of your chainsaw and increase the likelihood of starting problems.

My Experience: I’ve seen chainsaws that have lasted for decades with proper maintenance, and others that have failed after only a few years due to neglect. The difference is often in the details.

The Solution:

Regular Cleaning: Clean the saw regularly, removing sawdust and debris from the engine and components.
Chain Sharpening: Keep the chain sharp to reduce stress on the engine and improve cutting performance.
Bar Lubrication: Ensure the bar and chain are properly lubricated to reduce friction and wear.
Professional Servicing: Take the saw to a qualified technician for regular servicing, including tune-ups and inspections.

Cost Implications:

Reduced Repair Costs: Regular maintenance prevents more serious problems from developing, reducing the need for expensive repairs.
Extended Lifespan: Proper maintenance extends the lifespan of the saw, saving you money in the long run.
Improved Performance: A well-maintained saw performs better and more efficiently.

Data Point: Studies have shown that regular maintenance can extend the lifespan of a chainsaw by up to 50%.

Budgeting for Stihl MS250 Maintenance: A Realistic Approach

Now, let’s talk about the financial aspect of keeping your Stihl MS250 in top-notch condition. It’s easy to overlook maintenance costs, but they’re a crucial part of your overall wood processing budget. Here’s a breakdown of typical maintenance expenses:

Fuel and Oil: This is an ongoing cost, depending on how often you use the saw. Expect to spend around $20-$50 per month on fuel and oil, depending on usage.
Spark Plugs: $5-$10 per year.
Air Filters: $5-$15 per year.
Chain Sharpening: $10-$20 per sharpening, or the cost of a chain sharpening kit (around $30-$50). Professional sharpening services are also available, with prices ranging from $10 to $25 per sharpening.
Bar Oil: $10-$20 per gallon, depending on the brand and quality.
Professional Servicing: $50-$150 per year (depending on the services required).

Example Budget:

Let’s say you’re a homeowner who uses your Stihl MS250 for occasional firewood cutting and yard maintenance. Here’s a possible annual maintenance budget:

Fuel and Oil: $150
Spark Plug: $8
Air Filter: $10
Chain Sharpening (DIY Kit): $40 (initial investment, amortized over several years)
Bar Oil: $40
Total: $248 per year (excluding the initial cost of the sharpening kit)

If you’re a professional logger or firewood supplier, your maintenance costs will be significantly higher due to increased usage. You might need to factor in more frequent servicing, chain replacements, and other repairs.

Cost Optimization Tips:

DIY Maintenance: Learn to perform basic maintenance tasks yourself, such as cleaning the air filter, replacing the spark plug, and sharpening the chain.
Buy in Bulk: Purchase fuel, oil, and other supplies in bulk to save money.
Shop Around: Compare prices from different suppliers to find the best deals.
Preventative Maintenance: Regular preventative maintenance can prevent more serious problems from developing, saving you money in the long run.

Dealing with Difficult Starting Situations: A Troubleshooting Guide

Even with the best maintenance and starting techniques, you may occasionally encounter situations where your Stihl MS250 refuses to start. Here’s a troubleshooting guide to help you diagnose and resolve common starting problems:

Engine Flooding: If you’ve pulled the starter cord repeatedly without success, the engine may be flooded with fuel. To clear a flooded engine, remove the spark plug, pull the starter cord several times to expel excess fuel, and then reinstall the spark plug. Follow the cold start procedure again, but without using the choke.
Wet Spark Plug: A wet spark plug can prevent the engine from starting. Remove the spark plug and dry it with a clean cloth. Reinstall the spark plug and try starting the engine again.
No Spark: If you suspect a problem with the ignition system, perform a spark test. If there’s no spark, check the ignition coil, wiring, and spark plug.
Fuel Delivery Problems: If the engine is not receiving fuel, check the fuel tank, fuel lines, fuel filter, and carburetor. Make sure the fuel lines are not cracked or clogged. Replace the fuel filter if it’s dirty.
Low Compression: Low compression can make it difficult to start the engine. This can be caused by worn piston rings or a leaky cylinder head gasket. A compression test can help diagnose this problem.
Incorrect Fuel Mixture: Ensure you’re using the correct fuel-oil mixture ratio. Too much oil can foul the spark plug and prevent the engine from starting.

Statistical Data and Industry Benchmarks

To provide a clearer picture of the costs involved in wood processing and firewood preparation, here are some relevant statistical data and industry benchmarks:

Average Price per Cord of Firewood: The price of firewood varies depending on the location, wood species, and season. As of 2023, the average price per cord of seasoned firewood in the United States ranges from $200 to $400.
Timber Prices: Timber prices fluctuate depending on the species, quality, and market demand. According to the USDA Forest Service, the average stumpage price (the price paid for standing timber) for sawtimber in the United States in 2022 was around $300 per thousand board feet.
Equipment Rental Fees: The cost of renting logging equipment varies depending on the type of equipment and the rental period. A chainsaw rental typically costs between $30 and $50 per day. A log splitter rental can cost between $50 and $100 per day.
Labor Wages: The wages for logging crews and firewood handlers vary depending on the location, experience, and skill level. According to the Bureau of Labor Statistics, the median annual wage for logging workers in the United States in 2022 was around $45,000.
Fuelwood Market Rates: The fuelwood market is influenced by factors such as energy prices, weather conditions, and government regulations. In some regions, government subsidies are available to promote the use of biomass for heating.

Conclusion: Investing in Your Stihl MS250 for Long-Term Reliability

Starting a Stihl MS250 reliably is more than just pulling a cord; it’s a combination of understanding your equipment, using proper techniques, and investing in regular maintenance. By following these pro tips, you can minimize downtime, maximize efficiency, and save money in the long run. Think of it as an investment in your own productivity and peace of mind.

Remember, a well-maintained Stihl MS250 is a valuable asset that can provide years of reliable service. Don’t neglect the small things, like using fresh fuel, cleaning the air filter, and inspecting the spark plug. These simple tasks can make a big difference in the performance and longevity of your chainsaw.

So, get out there, start your saw with confidence, and enjoy the satisfaction of a job well done. And if you ever find yourself scratching your head over a stubborn starting problem, remember this guide and don’t hesitate to seek professional help. Your Stihl MS250 will thank you for it.

Starting a Stihl MS250 Guide (7 Pro Tips for Reliable Ignition)