Chainsaw coil pack

Types of Chainsaw Coil Packs

A chainsaw coil pack is a device that generates high voltage for chainsaws' ignition systems. It plays a crucial role in transforming low voltage into high voltage to ensure the chainsaw starts. Different types of chainsaw coil packs exist, all with their unique features.

• CDI (Capacitor Discharge Ignition) Coils:

These coils use capacitors to store energy and discharge it rapidly to ignite the fuel-air mixture. They are known for producing strong sparks and are used in high-performance chainsaws.

• Transistor Ignition (TI) Coils:

These chainsaws have coils controlled by transistors. The transistors regulate the current flow, enabling more precise control over the spark generation. As a result, it leads to better fuel efficiency and lower emissions.

• Dual-fire Coils:

They supply a spark to two cylinders simultaneously (if applicable). They are often used in larger, more powerful chainsaws with multiple engine cylinders.

• Single-fire Coils:

These coils provide one spark per engine cycle. They are the most common type and are used in smaller, more basic chainsaw engines.

• Wrap Coils:

  They can be any of the above-mentioned coils. However, they are called "wrap" because they are wrapped around a core to create a magnetic field. This is a traditional method of constructing ignition coils.

• Solid State Coils:

  They are similar to CDI coils but do not have capacitors. They are simpler and used in basic or older chainsaw models.

Specifications and Maintenance of Chainsaw Coil Packs

Understanding the specifications and maintenance of chainsaw coil packs is crucial for ensuring their functionality and durability. Here are some important specifications and maintenance tips:

• Voltage Output

  The chainsaw ignition coil generates a high-voltage signal for the spark plug. The voltage output of the coil is usually between 5,000 and 30,000 volts, depending on the saw's make and model. The output is sufficient to ensure reliable ignition of the fuel-air mixture in the combustion chamber.

• Coil Resistance

  The chainsaw ignition coil has a primary and secondary winding. The resistance of the primary winding is usually between 0.5 and 2 ohms, while that of the secondary winding is between 5,000 and 15,000 ohms. This low resistance ensures efficient energy transfer from the battery to the spark plug.

• Inductance

  Inductance is an important specification of chainsaw ignition coils. It determines the coil's ability to store energy and generate a high-voltage spark. Coil inductance varies from 1 to 10 millihenries (mH) in most chainsaws. A higher inductance value results in a more powerful spark, which is beneficial for reliable engine ignition.

• Coil Size and Weight

  The size and weight of chainsaw ignition coils vary depending on the coil type and the chainsaw model. Generally, they are compact and lightweight, measuring about 5–10 cm in length and 3–5 cm in width. The weight of the coils is approximately 100–300 grams. The small size and light weight of the coils are beneficial for their installation in chainsaws and for the portability and usability of the chainsaws.

• Magnetic Material

  The chainsaw ignition coil contains a core made of magnetic material, such as iron or ferrite. This magnetic material plays an important role in increasing energy transfer and improving the coil's efficiency. Iron cores are the most commonly used because of their good magnetic properties and low cost.

• Coating and Protection

  The chainsaw ignition coil is usually coated with a layer of insulating material, such as epoxy or silicone. This coating provides insulation and protects the coil from moisture, dust, and other environmental factors. The protective layer of the coils increases their durability and reliability, reducing the risk of failure due to external influences.

Here are some tips for maintaining chainsaw ignition coils:

• 1. Regular Cleaning: Keep the chainsaw coil pack clean and free of debris, moisture, and oil. A clean coil ensures optimal voltage output.
• 2. Inspection: Regularly inspect the coil pack for signs of wear, cracks, or damage. Replace any defective units to avoid ignition issues.
• 3. Proper Airflow: Ensure that the coil pack has adequate airflow. Overheating can damage the coils and affect their performance.
• 4. Correct Gap Distance: Ensure that the gap distance between the coil and the spark plug is correct. An incorrect distance can lead to weak sparks or no ignition.
• 5. Moisture Protection: Protect the chainsaw coil from moisture and corrosive substances. If the coil is exposed to moisture, it may cause short circuits.
• 6. Proper Voltage Supply: Ensure that the ignition system provides the correct voltage to the coil. A low or unstable voltage supply can affect the coil's performance.
• 7. Professional Inspection: If there are any problems with the chainsaw's ignition system, have it inspected and repaired by a qualified professional. They have the necessary tools and expertise to diagnose and repair ignition system problems.
• 8. Use Quality Replacement Coils: If it becomes necessary to replace the coil, use a high-quality spare part that meets the specifications of the original coil. This will ensure the reliability of the ignition system.

By following these recommendations, users can maintain their chainsaw ignition coils in good condition, thus ensuring reliable engine operation and optimal performance of the chainsaw.

How to Choose Chainsaw Coil Pack

Selecting the proper ignition chainsaw coil pack is crucial for maintaining chainsaws' optimal performance. Here are some tips to help users choose the right chainsaw ignition coil pack:

• Consider the voltage:

  The chainsaw packs of the ignition coils generate different voltages. Depending on the size and type of the chainsaw, users should select a coil that produces the required voltage. Besides, a higher-voltage coil can provide more energy for a bigger or more powerful chainsaw.

• Check the resistance:

  The resistance levels of the chainsaw ignition coil pack also vary. Typically, coils with higher resistance provide more power but less heat. Meanwhile, lower-resistance coils generate less power but more heat. Depending on the conditions and requirements of work, users should select a suitable coil.

• Choose the right size:

  Ignition coil packs come in various sizes. Users should select a size suitable for the chainsaw's engine to ensure proper fit and function.

• Consider the material:

  The chainsaw ignition coil packs are usually made of steel or copper wire. Each material has advantages and disadvantages. Steel coils are often more durable, but they may not generate as much energy as coils made of copper wire.

• Find a reputable brand:

  Many brands are manufacturing chainsaw ignition coil packs. Users should find a reputable brand to ensure the quality and durability of the coils. Typically, well-known brands include Stihl, Husqvarna, and Echo.

• Read reviews:

  Before purchasing a chainsaw ignition coil pack, users should read reviews from other customers. These reviews will help them understand the quality, durability, and performance of the coils.

• Warranty:

  Some manufacturers may provide a warranty for their products. The warranty is an important consideration when choosing a chainsaw ignition coil pack. It shows the manufacturer's confidence in the quality of the product.

By considering the above factors, users can choose a suitable chainsaw ignition coil pack for their requirements and needs.

How to DIY and replace Chainsaw coil packs

It is easy to replace a chainsaw coil pack, provided that the user has the right skills and knowledge. Here is a simple guide on how to DIY and replace a chainsaw coil pack.

Firstly, get the right tools for the job: a screwdriver set, an 8mm socket, a spark plug gap tool or feeler gauge, and the replacement coil pack. Once the chainsaw has been turned off and the safety precautions taken, start by removing the cover that protects the spark plug. This is done by loosening the screws using a screwdriver.

The next step is to loosen the screws that hold the spark plug. A socket wrench can be used to remove the two 8mm bolts that secure the ignition module to the chainsaw. After that, gently lift the ignition module away from the coil and set it aside.

Now, remove the old coil pack. This is the time to pay attention to how the ignition module was positioned on the old coil pack. Carefully remove the old coil pack from the chainsaw.

Then, install the new coil pack. Position the new coil pack in the same way as the old one was mounted. Be careful not to touch the metal side of the ignition module when doing this, as it can cause a shock. Gently press down on the coil pack to make sure it is properly seated.

After that, adjust the gap between the coil and the flywheel. This is done by turning the screws that hold the coil pack to the chainsaw. Then, place a thin piece of cardboard or a business card between the coil and the flywheel. Carefully close the gap until the coil pack lightly touches the card. This ensures the spark is strong without damaging the coil.

Return the ignition module to its proper position and reconnect the spark plug. After adjusting the gap, the ignition module should be returned to its previous position and the spark plug reconnected. The user should be careful to remember the wiring connections.

Finally, test the chainsaw. After reassembling everything, ensure that the chainsaw's coil is working properly. Before cutting any trees, do a basic run to see if everything is working properly.

Q and A

Q1: Which other parts of a chainsaw, apart from the coil pack, should be considered for maintenance?

A1: Other chainsaw parts to consider are the spark plug, carburetor, air filter, fuel tank, bar and chain, and oil pump. These parts are as important as the coil pack and require regular checks to ensure the chainsaw runs smoothly.

Q2: Does the chainsaw run when the coil pack is faulty?

A2: No, the chainsaw won't run if the coil pack is faulty. The coil pack generates electrical power for the spark plug to ignite the fuel. As such, a faulty coil pack will lead to a non-starting chainsaw.

Q3: Can a chainsaw coil pack be repaired?

A3: Repairing chainsaw coil packs is not recommended. However, minor issues like loose connections may be fixed. Other than that, it is best to replace the coil pack when it is faulty.

Q4: Do all chainsaws have a coil pack?

A4: Yes, all gasoline-powered chainsaws use ignition coils to generate spark for combustion engines. Even some battery-powered chainsaws may use a similar system for spark generation.

Q5: What other names do people call the chainsaw coil pack?

A5: Users may refer to the chainsaw coil pack as the ignition coil, spark coil, or simply, the ignition system.