Buying Chainsaws: How to Choose the Best Chainsaw for the Job

Whether you're a keen DIYer, a professional landscaper, or simply need to clear some overgrown foliage in your garden, a chainsaw can be an incredibly useful tool to have in your arsenal. However, with so many different models and specifications on the market, it can be tricky to know which chainsaw is the right one for your needs.

In this comprehensive guide, we'll walk you through the key factors to consider when choosing a chainsaw, from power source and engine size to safety features and maintenance requirements. By the end, you'll be equipped with the knowledge to select the perfect chainsaw for your projects.

Power Source: Petrol vs. Electric

The first major decision you'll need to make is whether to opt for a petrol-powered or electric chainsaw. Both have their own unique advantages and disadvantages, so it's important to weigh your priorities.

Petrol chainsaws are typically preferred by professional users and those tackling larger-scale jobs. They offer superior power and cutting performance, easily slicing through thick, hardwood logs with ease. The lack of a power cord also gives you greater freedom of movement, making petrol chainsaws ideal for use in remote or hard-to-reach areas.

However, petrol chainsaws do require more maintenance than their electric counterparts. You'll need to regularly service the engine, top up the fuel, and sharpen the chain. They're also significantly louder and produce exhaust fumes, which is something to keep in mind if you'll be using the chainsaw in enclosed spaces or around others.

Electric chainsaws, on the other hand, are a great option for homeowners and DIY users. They're generally lighter, quieter, and produce no direct emissions, making them a more environmentally friendly choice. Electric models also require less ongoing maintenance, as there's no engine to service.

The main downside of electric chainsaws is the limited runtime between charges, which can be restrictive if you have a lot of work to get through. You'll also be tethered to a power outlet, hampering your mobility. That said, the latest cordless, battery-powered models are starting to offer impressive runtime and power, bridging the gap with petrol saws.

Ultimately, your decision will come down to the scale and location of your projects, as well as your personal preferences regarding noise, emissions, and maintenance.

Engine Size and Bar Length

Once you've decided on the power source, you'll need to consider the engine size and bar length of the chainsaw. These two factors are closely linked, as a larger engine will typically be paired with a longer guide bar.

The engine size, measured in cubic centimetres (cc), determines the overall power and cutting capacity of the chainsaw. As a general rule, the more cc, the more powerful the saw. Petrol chainsaws can range anywhere from around 30 cc for compact, lightweight models up to 70 cc or more for heavy-duty, professional-grade saws.

The guide bar length, measured in inches, refers to the length of the metal bar that the chain runs around. Longer bars allow you to take on larger-diameter logs and branches, but they also require more power to operate effectively. Smaller bars, on the other hand, are better suited to lighter-duty tasks and are easier to manoeuvre in confined spaces.

When choosing the right engine size and bar length, you'll need to strike a balance between power, versatility, and maneuverability. For most homeowner and DIY applications, a petrol chainsaw in the 40–50 cc range with a 16–20 inch bar should provide ample performance. If you're tackling more heavy-duty jobs like felling trees or processing large volumes of firewood, then stepping up to a 50–60 cc saw with a 20–24 inch bar would be a wise investment.

It's worth noting that electric chainsaws typically have a narrower range of engine sizes and bar lengths compared to petrol models. Most corded and cordless electric saws tend to fall within the 30–40 cm and 12–16 inch bar range, making them well-suited to lighter-duty tasks around the home and garden.

Safety Features

Safety should always be the top priority when using a chainsaw. Look for models that incorporate the latest safety features, such as:

• Chain brake: This instantly stops the chain if kickback occurs, reducing the risk of injury.
• Inertia-activated chain brake: This automatic brake is triggered by sudden movements, providing an extra layer of protection.
• Low-kickback chain: Specially designed chains with reduced kickback potential.
• Throttle lock: Prevents the engine from revving unintentionally.
• Hand guard: Shields your front hand from branches and debris.

It's also crucial to always wear the proper personal protective equipment (PPE) when operating a chainsaw, including a safety helmet, goggles, gloves, chaps, and steel-toed boots.

Kickback is one of the primary hazards associated with chainsaws and can occur when the tip of the guide bar makes contact with a solid object, causing the saw to suddenly "kick back" towards the operator. This can lead to serious injury, so it's vital to choose a model with effective kickback prevention features.

Inertia-activated chain brakes are particularly useful, as they automatically engage the brake when the saw experiences a sudden deceleration, such as during a kickback incident. Low-kickback chains, which have been specially designed to reduce the risk of kickback, are another important safety feature to look out for.

Beyond the saw itself, your choice of PPE can also make a significant difference in terms of personal protection. Chainsaw chaps, for example, are designed to instantly stop the saw if it comes into contact with your legs, while a good-quality safety helmet can shield your head from falling branches.

Maintenance and Upkeep

Regardless of whether you choose a petrol or electric model, regular maintenance is essential to keep your chainsaw in peak condition and ensure safe, efficient operation. Key tasks include:

• Sharpening the chain: Dull chains cut slowly and inefficiently, so you'll need to sharpen them periodically using a file or electric sharpener.
• Adjusting the chain tension: The chain needs to be kept at the correct tension to prevent it from jumping off the bar.
• Topping up the oil: Petrol saws require chain oil to keep the bar and chain lubricated, while electric models may have an integrated oil reservoir.
• Cleaning the air filter: Regularly cleaning or replacing the air filter will ensure optimal engine performance.
• Servicing the engine: For petrol chainsaws, you'll need to get the engine serviced according to the manufacturer's recommendations.

Taking the time to properly maintain your chainsaw will not only extend its lifespan but also improve its safety and performance.

Sharpening the chain is one of the most important and frequent maintenance tasks. A dull chain will cut slowly and inefficiently, placing greater strain on the engine and making the saw more difficult to control. Depending on how heavily you use the chainsaw, you may need to sharpen the chain every few hours of operation.

You can either use a manual chainsaw file or an electric sharpener to keep the teeth in top condition. Electric sharpeners tend to be faster and more consistent, but they do require a bit more setup and can be more expensive. For occasional users, a quality manual file is often a more affordable and practical solution.

Adjusting the chain tension is another essential maintenance step. If the chain is too loose, it can jump off the guide bar, potentially causing damage or injury. Conversely, if it's too tight, it will bind to the bar and increase wear on the components. Checking and adjusting the tension before each use is highly recommended.

For petrol chainsaws, regularly servicing the engine is crucial to ensuring reliable, long-term performance. This typically involves tasks like changing the spark plug, air filter, and engine oil, as well as checking for any wear or damage to internal components. Consult your owner's manual for the manufacturer's recommended service intervals.

Electric chainsaws generally require less intensive maintenance, as there's no engine to worry about. However, you'll still need to keep the chain, bar, and other moving parts well-lubricated and free from debris. Checking and topping up the oil reservoir, if applicable, is also an important task.

By staying on top of these essential maintenance requirements, you can help extend the lifespan of your chainsaw and ensure it continues to operate safely and effectively for years to come.

Other Considerations

As you're evaluating different chainsaw models, there are a few other factors worth considering:

• Weight: Chainsaws can vary significantly in weight, from around 3 kg for compact, battery-powered saws up to 6 kg or more for professional petrol models. The weight will impact the ease of use, especially for prolonged periods.
• Vibration: Prolonged use of chainsaws can lead to hand-arm vibration syndrome (HAVS), so look for models with anti-vibration features to minimise this risk.
• Noise levels: Petrol chainsaws in particular can be incredibly noisy, so consider the decibel rating and whether you'll need to use hearing protection.
• Additional features: Some chainsaws come with useful added features like tool-free chain tensioning, automatic oiling systems, and quick-release air filters.

Weight is an important consideration, as a heavier saw can quickly become tiring to operate, especially if you'll be using it for extended periods. Lighter, more compact models are generally better suited for occasional, lighter-duty tasks, while professionals and those tackling larger projects may prefer the increased power and stability of a heavier saw.

Vibration can also be a significant issue with chainsaws, potentially leading to hand-arm vibration syndrome (HAVS) if exposure is prolonged. HAVS is a debilitating condition that can cause pain, tingling, and loss of sensation in the hands and fingers. Look for saws with effective anti-vibration features, such as isolated handles or rubber-mounted components, to help minimise this risk.

Noise levels are another important factor, particularly if you'll be using the chainsaw in built-up areas or near others. Petrol-powered models tend to be significantly louder than their electric counterparts, so consider the decibel rating and whether you'll need to use hearing protection like earmuffs or plugs.

Some chainsaws also come with additional features that can make them easier to use and maintain. Things like tool-free chain tensioning, automatic oiling systems, and quick-release air filters can all be valuable time-savers and contribute to a safer, more hassle-free experience.

Ultimately, the "best" chainsaw for your needs will depend on a combination of factors, including the scale and nature of your projects, your personal preferences, and your budget. By carefully weighing up all of these considerations, you'll be able to find the perfect saw to tackle your upcoming tasks with confidence and safety.

Choosing the Right Chainsaw for Your Needs

To help you make an informed decision, let's look at some typical use cases and the types of chainsaws that would be best suited to each:

Light-Duty Homeowner/DIY Use

For occasional, light-duty tasks around the home and garden, such as trimming branches, clearing bushes, or processing small-diameter firewood, a compact electric or cordless chainsaw in the 30–40-cc and 12–16-inch bar range would be a good choice. These saws are generally lightweight, easy to manoeuvre, and require minimal maintenance. They're a great option for homeowners who don't need the power and runtime of a larger gasoline model.

Medium-Duty Yard and Garden Work

If you have more extensive yard work to tackle, such as clearing fallen trees, pruning large branches, or processing moderate volumes of firewood, then a petrol chainsaw in the 40–50 cc and 16–20 inch bar range would be better suited. These saws offer a nice balance of power, portability, and versatility, making them a popular choice for homeowners with sizeable properties and DIYers tackling more demanding projects.

Heavy-Duty Professional/Commercial Use

For professional landscapers, arborists, and those undertaking large-scale forestry or tree removal work, a high-powered petrol chainsaw in the 50–70 cc and 20–24-inch bar range would be the best fit. These heavy-duty models excel at felling trees, bucking large logs, and processing significant volumes of firewood or timber. They do require more maintenance than lighter-duty saws, but the increased power and performance make them an essential tool for commercial users.

No matter which chainsaw you ultimately choose, be sure to familiarise yourself with the specific model, read the owner's manual thoroughly, and always prioritise safety when operating the saw. With the right tool for the job and a commitment to proper maintenance and safe use, you'll be well on your way to tackling your upcoming projects with confidence.