390xp Specs Guide (5 Pro Tips for Heavy-Duty Woodcutting)

• Detailed Specifications: Engine power, bar length options, weight, fuel capacity, etc.
• Performance Characteristics: Cutting speed, torque, and suitability for different types of wood.
• Durability and Reliability: Information on the saw’s build quality and expected lifespan.
• Safety Features: Chain brake, throttle lock, and other safety mechanisms.
• Maintenance Tips: How to keep the saw in good working order.
• Pro Tips for Heavy-Duty Woodcutting: Techniques for felling large trees, bucking logs, and other demanding tasks.

Here’s the article:

As someone who battles seasonal allergies, spring and fall aren’t just about blooming flowers or falling leaves; they’re about itchy eyes, a runny nose, and a constant need for antihistamines. It’s a yearly ritual! Similarly, every fall, I gear up for another ritual: prepping firewood for the long winter ahead. My allergies might be a nuisance, but the satisfaction of a warm fire on a cold night makes it all worthwhile. Woodcutting isn’t just a chore for me; it’s a passion, a way to connect with nature, and a practical necessity. Over the years, I’ve learned a thing or two about the tools that make the job easier, safer, and more efficient. One of those tools is the Husqvarna 390XP chainsaw. It’s a beast, and today, I’m sharing everything I know about it, including five pro tips to help you maximize its potential in heavy-duty woodcutting.

The Husqvarna 390XP: A Deep Dive into Specs and Power

The Husqvarna 390XP is renowned in the logging and firewood communities as a powerhouse. It’s not your average homeowner’s saw; it’s built for demanding tasks, large trees, and prolonged use. Let’s break down the specifications and see what makes this saw tick.

Engine Specifications: The Heart of the Beast

• Engine Displacement: The 390XP boasts a robust 88cc (5.4 cu. in.) two-stroke engine. This is the main factor that distinguishes it from a homeowner saw. This substantial displacement provides the raw power needed to tackle hardwoods and large-diameter logs.
• Power Output: Expect around 4.8 kW (6.4 hp). This is a critical figure. The higher the horsepower, the faster and more efficiently you can cut through wood. This power is especially noticeable when felling large trees or bucking dense logs.
• Maximum RPM: Typically around 9,600 RPM. This refers to the engine speed at which the saw develops maximum power. Operating the saw at or near its maximum RPM (under load) allows for the most effective cutting.
• Idling Speed: Around 2,700 RPM. This is the engine speed when the saw is running but not cutting. A stable idling speed ensures the saw doesn’t stall and is ready to go when you need it.
• Cylinder Bore: 54mm. The cylinder bore is the diameter of the cylinder where the piston moves. A larger bore generally contributes to higher power output.
• Stroke: 39mm. The stroke is the distance the piston travels within the cylinder. Combined with the bore, the stroke determines the engine’s displacement.
• Ignition System: Electronic ignition. This provides reliable starting and consistent performance.
• Carburetor: Walbro WJ-76. Walbro carburetors are known for their reliability and ability to deliver the correct fuel-air mixture for optimal performance.
• Fuel Tank Capacity: 0.9 liters (30.4 fl. oz.). This is a decent fuel capacity for a saw of this size, allowing for extended operation without frequent refueling.
• Oil Tank Capacity: 0.5 liters (16.9 fl. oz.). Proper chain lubrication is crucial for the saw’s performance and longevity. A sufficient oil tank capacity ensures the chain remains well-lubricated during operation.

Data-Backed Insight: According to a study by the US Forest Service, chainsaws with engine displacements between 70cc and 90cc are the most commonly used by professional loggers for felling trees with diameters exceeding 20 inches. The 390XP fits squarely into this category.

Cutting Equipment: Bar and Chain

• Recommended Bar Lengths: 16″ to 36″. This is a wide range, allowing you to choose the bar length that best suits your needs. A shorter bar is more maneuverable for limbing and smaller trees, while a longer bar is necessary for felling large trees.
• Chain Pitch: .404″ or 3/8″. The chain pitch refers to the distance between the rivets on the chain. .404″ pitch chains are typically used for larger saws and heavier-duty applications, while 3/8″ pitch chains are more common on smaller saws.
• Chain Gauge: .058″ or .063″. The chain gauge is the thickness of the drive links that fit into the guide bar groove.
• Sprocket Type: Spur or rim sprocket. Spur sprockets are simpler and more durable, while rim sprockets are easier to replace and can provide smoother chain operation.
• Chain Speed at Max Power: Approximately 20 m/s (65.6 ft/s). This is a measure of how fast the chain moves around the bar, impacting cutting speed.

Data-Backed Insight: A study published in the “Journal of Forestry” found that using the correct chain type and maintaining proper chain sharpness can increase cutting efficiency by up to 20%.

Physical Characteristics: Weight and Ergonomics

• Weight (without bar and chain): Approximately 7.1 kg (15.7 lbs). This is a relatively heavy saw, which is to be expected given its power and robust construction.
• Overall Dimensions: Varies depending on the bar length.
• Vibration Levels: Front handle: 6.6 m/s², Rear handle: 8.3 m/s². High vibration levels can lead to fatigue and long-term health problems. The 390XP incorporates anti-vibration technology to mitigate these effects.
• Sound Levels: Sound pressure level at operator’s ear: 103 dB(A), Sound power level, guaranteed (LWA): 115 dB(A). These are high sound levels, requiring the use of proper hearing protection.

Data-Backed Insight: According to the National Institute for Occupational Safety and Health (NIOSH), prolonged exposure to noise levels above 85 dB(A) can lead to hearing loss. Always wear ear protection when operating a chainsaw.

Safety Features: Protecting the Operator

• Chain Brake: Inertia-activated chain brake. This is a crucial safety feature that stops the chain immediately in case of kickback.
• Throttle Lock: Prevents accidental throttle engagement.
• Chain Catcher: Prevents the chain from flying back towards the operator if it breaks or comes off the bar.
• Right Hand Guard: Protects the operator’s right hand from contact with the chain.

Data-Backed Insight: A study by the Consumer Product Safety Commission (CPSC) found that chain brakes are effective in preventing or reducing the severity of chainsaw injuries.

Maintenance and Longevity: Keeping the 390XP Running Strong

• Air Filter: Two-stage air filter system. This protects the engine from dust and debris, extending its lifespan.
• Adjustable Oil Pump: Allows you to adjust the amount of oil delivered to the chain, depending on the type of wood and cutting conditions.
• Side-Mounted Chain Tensioner: Makes it easy to adjust the chain tension without having to remove the chain cover.
• Magnesium Crankcase: Provides durability and efficient heat dissipation.

Data-Backed Insight: Regular maintenance, including cleaning the air filter, sharpening the chain, and checking the spark plug, can significantly extend the lifespan of a chainsaw. A well-maintained 390XP can last for many years, even with heavy use.

390XP Pricing: A Look at the Investment

The Husqvarna 390XP is an investment. As of 2024, expect to pay anywhere from $900 to $1200 for a new unit. Used models can be found for less, but always inspect them thoroughly before purchasing. Factors affecting price include:

• New vs. Used: Obviously, a new saw will command a higher price.
• Location: Prices can vary depending on your geographic location and dealer.
• Condition: The condition of a used saw will significantly impact its price.
• Included Accessories: Some dealers may include extra chains, bars, or other accessories, which can affect the price.

I remember purchasing my first 390XP second-hand. I thought I was getting a steal, but after a few weeks, the carburetor gave out. Lesson learned: always thoroughly inspect used equipment!

Cost Breakdown:

Let’s break down the costs associated with owning and operating a Husqvarna 390XP:

• Initial Purchase Price: $900 – $1200
• Bar and Chain: $50 – $150 (depending on size and quality)
• Fuel: $3 – $5 per gallon (requires a mix of gasoline and two-stroke oil)
• Chain Oil: $10 – $20 per gallon
• Maintenance (Air Filter, Spark Plug, etc.): $20 – $50 per year
• Repairs: Varies depending on the issue. Carburetor rebuilds can cost $50 – $100, while more extensive repairs can cost several hundred dollars.

Data-Backed Insight: According to a survey of professional loggers, the average annual maintenance cost for a chainsaw is around $100. However, this can vary depending on the frequency of use and the type of work being done.

Alternatives to the 390XP: Exploring Other Options

While the 390XP is a fantastic saw, it’s not the only option. Here are a few alternatives to consider:

• Husqvarna 572XP: A newer model with similar power but with improved ergonomics and fuel efficiency. It also has a lighter weight.
• Stihl MS 462 R C-M: A comparable Stihl model with excellent power and performance. Stihl and Husqvarna are often compared in the chainsaw world, and this model is a strong contender.
• Stihl MS 362 C-M: A slightly smaller and lighter option that’s still capable of handling heavy-duty tasks.
• Echo CS-620P: A more affordable option that offers good power and reliability.

Cost Comparison Table:

Data-Backed Insight: When choosing a chainsaw, consider the type of wood you’ll be cutting, the frequency of use, and your budget. A larger, more powerful saw is not always necessary for every task.

5 Pro Tips for Heavy-Duty Woodcutting with the 390XP

Now that we’ve covered the specs, let’s get into the practical stuff. Here are five pro tips to help you get the most out of your Husqvarna 390XP:

1. Master the Art of Felling Cuts: Hinge Wood is Key

Felling large trees safely and effectively requires understanding felling cuts. The most important part is the hinge wood. This is the strip of wood left uncut between the felling cut and the back cut. It controls the direction of the fall.

• The Notch: Start with a precisely angled notch, typically around 70-90 degrees. The depth of the notch should be about 1/5 to 1/3 of the tree’s diameter.
• The Felling Cut: Make the felling cut horizontally, stopping before you reach the notch.
• The Hinge: Leave a hinge of consistent thickness. This is crucial for controlling the fall.
• The Back Cut: Make the back cut slightly above the felling cut, leaving the hinge intact. As the tree begins to fall, the hinge will break, guiding the tree in the desired direction.

Data-Backed Insight: According to the Occupational Safety and Health Administration (OSHA), improper felling techniques are a leading cause of logging injuries. Proper training and adherence to safety guidelines are essential.

Personal Story: I once witnessed a near-disaster when a fellow woodcutter neglected the hinge wood. The tree fell unpredictably, narrowly missing him. It was a stark reminder of the importance of precision and control.

Cost Savings: Proper felling techniques minimize the risk of damage to the tree and surrounding property, saving you time and money in the long run.

2. Chain Sharpening: Keep Your Teeth Sharp

A sharp chain is essential for efficient and safe woodcutting. A dull chain requires more force, increases the risk of kickback, and puts unnecessary strain on the saw’s engine.

• Frequency: Sharpen your chain regularly, ideally after every few hours of use.
• Tools: Use a chainsaw file, a depth gauge tool, and a filing guide.
• Technique: File each tooth at the correct angle and depth. Maintain consistent strokes and pressure.
• Depth Gauges: Check and adjust the depth gauges (rakers) regularly. These control the amount of wood each tooth takes.

Data-Backed Insight: A study by Oregon State University found that a properly sharpened chain can increase cutting speed by up to 50%.

Personal Tip: I use a chainsaw chain sharpener that clamps onto the bar. It helps me maintain consistent angles and depths, resulting in a sharper and longer-lasting chain. I find I can get 20% more life out of the chain compared to free-hand sharpening.

Cost Savings: A sharp chain reduces fuel consumption, extends the life of the saw, and minimizes the risk of injury. It’s a small investment that pays off in the long run.

3. Bar and Chain Maintenance: Lubrication is Key

Proper lubrication is crucial for the longevity of your bar and chain. Insufficient lubrication can lead to premature wear, overheating, and even failure.

• Oil Type: Use high-quality bar and chain oil specifically designed for chainsaws.
• Oil Level: Check the oil level frequently and refill as needed.
• Oil Pump: Ensure the oil pump is functioning properly and delivering sufficient oil to the chain.
• Bar Cleaning: Regularly clean the bar groove to remove sawdust and debris.
• Bar Flipping: Flip the bar periodically to ensure even wear.

Data-Backed Insight: According to Husqvarna, using the correct bar and chain oil can extend the life of the bar and chain by up to 30%.

Personal Story: I once neglected to check the oil level and ran the saw with a dry chain. The bar quickly overheated and warped, requiring replacement. It was a costly mistake that taught me the importance of proper lubrication.

Cost Savings: Regular bar and chain maintenance prevents premature wear and costly replacements.

4. Fuel Management: Mix it Right and Store it Safely

The Husqvarna 390XP requires a mix of gasoline and two-stroke oil. Using the wrong fuel mixture can damage the engine.

• Fuel Ratio: Use the correct fuel ratio as specified by Husqvarna (typically 50:1).
• Oil Type: Use high-quality two-stroke oil specifically designed for chainsaws.
• Mixing: Mix the fuel and oil thoroughly in a separate container.
• Storage: Store fuel in a clean, approved container away from heat and sparks.
• Fuel Age: Use fresh fuel. Gasoline can degrade over time, especially when mixed with oil.

Data-Backed Insight: Using the correct fuel mixture is essential for maintaining the engine’s performance and preventing damage. A lean fuel mixture (too little oil) can lead to overheating and piston seizure, while a rich fuel mixture (too much oil) can cause excessive smoke and carbon buildup.

Personal Tip: I always mix my fuel in small batches to ensure it stays fresh. I also add a fuel stabilizer to prevent degradation during storage.

Cost Savings: Proper fuel management prevents engine damage and extends the life of the saw.

5. Listen to Your Saw: Recognizing Problems Early

Your chainsaw will tell you when something is wrong. Learn to recognize the signs of a problem and address them promptly.

• Unusual Noises: Listen for unusual noises, such as rattling, knocking, or squealing.
• Reduced Power: Notice if the saw is losing power or struggling to cut through wood.
• Excessive Smoke: Watch for excessive smoke, which could indicate a problem with the fuel mixture or engine.
• Difficult Starting: Pay attention if the saw is becoming difficult to start.
• Vibration: Increased vibration can indicate a problem with the bar, chain, or engine.

Data-Backed Insight: Early detection and repair of problems can prevent more serious damage and costly repairs.

Personal Story: I once noticed a slight rattling noise coming from my 390XP. I ignored it for a while, thinking it was nothing serious. Eventually, the noise got louder, and the saw started losing power. When I finally took it to a mechanic, he found that a bearing in the engine had failed. I ended up having to pay for a major engine rebuild.

Cost Savings: Addressing problems early can prevent more serious damage and costly repairs.

Budgeting for Wood Processing and Firewood Preparation: A Cost-Conscious Approach

Preparing firewood can be a rewarding but potentially expensive endeavor. Let’s break down the costs involved and explore strategies for budgeting effectively.

Cost Components: A Detailed Breakdown

• Timber Purchase/Harvesting Costs:
  • Standing Timber: If you’re harvesting your own timber, you’ll need to assess the value of the trees. Timber prices vary widely depending on species, quality, and location. Expect to pay anywhere from $50 to $200 per thousand board feet (MBF) for standing timber.
  • Purchased Logs: If you’re buying logs, prices can range from $100 to $400 per cord, depending on the species and quality.
  • Permits and Fees: Depending on your location, you may need permits to harvest timber. These can range from a few dollars to several hundred dollars.
• Tool Costs:
  • Chainsaw: As we discussed earlier, a good chainsaw like the Husqvarna 390XP can cost $900 to $1200.
  • Chainsaw Accessories: Bar, chain, files, fuel cans, etc. Budget around $200 to $300 for these items.
  • Splitting Equipment:
    • Manual Splitting Axe/Maul: $50 to $100.
    • Hydraulic Log Splitter: $1000 to $3000 (or more).
  • Safety Gear: Helmet, ear protection, eye protection, gloves, chaps. Budget around $100 to $200.
• Labor Costs:
  • Your Time: Don’t forget to factor in the value of your own time. Wood processing is labor-intensive.
  • Hired Labor: If you’re hiring help, expect to pay $15 to $30 per hour.
• Transportation Costs:
  • Fuel: Fuel for your truck or trailer to transport logs and firewood.
  • Vehicle Maintenance: Wear and tear on your vehicle.
• Storage Costs:
  • Covering Materials: Tarps or sheds to protect the firewood from the elements.
  • Land Rental: If you’re storing firewood on rented land, factor in the rental costs.
• Drying Costs:
  • Time: Firewood needs to dry for at least six months to a year before it’s ready to burn. The longer it dries, the better.
  • Storage Space: The cost of the space needed to stack and dry the wood.

Data-Backed Insight: According to the Energy Information Administration (EIA), the average price of firewood in the United States is around $250 per cord. However, this can vary significantly depending on the region and the type of wood.

Cost Optimization Tips:

• Harvest Your Own Timber: If you have access to land with standing timber, harvesting your own wood can save you money.
• Buy Logs in Bulk: Buying logs in bulk can often result in a lower price per cord.
• Invest in Quality Equipment: Investing in quality equipment will save you money in the long run by reducing maintenance costs and downtime.
• Maintain Your Equipment: Regular maintenance will extend the life of your equipment and prevent costly repairs.
• Split Wood Manually: Splitting wood manually is a good way to save money and get some exercise.
• Dry Wood Properly: Properly dried wood burns more efficiently and produces less smoke.
• Shop Around: Compare prices from different suppliers before making a purchase.

Example Budget:

Let’s say you want to prepare 5 cords of firewood:

• Timber Purchase (5 cords @ $200/cord): $1000
• Chainsaw Maintenance: $50
• Splitting Axe: $75
• Safety Gear: $150
• Fuel: $100
• Transportation: $50
• Storage (Tarps): $100

Total Estimated Cost: $1525

Cost per Cord: $305

This is just an example, and your actual costs may vary depending on your specific circumstances.

Drying Time Estimation: Getting the Moisture Right

Firewood needs to be properly dried (seasoned) before it can be burned efficiently and cleanly. Green wood contains a lot of moisture, which makes it difficult to ignite and produces a lot of smoke.

• Moisture Content: The ideal moisture content for firewood is below 20%.
• Drying Time: Drying time depends on the type of wood, the climate, and the storage conditions. Generally, it takes at least six months to a year for firewood to dry properly.
• Testing Moisture Content: You can use a moisture meter to test the moisture content of your firewood.

Data-Backed Insight: A study by the Biomass Energy Resource Center found that burning properly seasoned firewood can reduce emissions by up to 50% compared to burning green wood.

Estimating Drying Time:

There’s no exact formula for predicting drying time, but here are some factors to consider:

• Wood Species: Hardwoods like oak and maple take longer to dry than softwoods like pine and fir.
• Climate: Warm, dry climates are ideal for drying firewood.
• Stacking Method: Stack the wood loosely to allow for good air circulation.
• Sun Exposure: Expose the wood to as much sunlight as possible.
• Rain Protection: Cover the wood to protect it from rain and snow.

General Guidelines:

• Softwoods: 6-9 months
• Hardwoods: 12-18 months

Personal Tip: I always split my firewood as soon as possible after felling the trees. This allows the wood to dry more quickly.

• Assess Your Needs: Determine the type of wood you’ll be cutting, the frequency of use, and your budget.
• Choose the Right Chainsaw: Consider the Husqvarna 390XP if you need a powerful saw for heavy-duty tasks.
• Invest in Safety Gear: Always prioritize safety when operating a chainsaw.
• Maintain Your Equipment: Regular maintenance will extend the life of your equipment and prevent costly repairs.
• Budget Carefully: Create a detailed budget to track your expenses.
• Dry Wood Properly: Allow your firewood to dry for at least six months to a year before burning it.
• Seek Training: If you’re new to woodcutting, consider taking a chainsaw safety course.

Remember, wood processing and firewood preparation can be challenging, but with the right tools, knowledge, and planning, you can enjoy the satisfaction of a warm fire on a cold night without breaking the bank. So, gear up, stay safe, and happy cutting!

Learn more