Husqvarna 261 manual Cooling system, Winter use, Centrifugal cleaning Air Injection

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MAINTENANCE

Cooling system

To obtain the lowest possible running temperature the saw is equipped with a cooling system.

Winter use

During winter time, powder snow and cold weather can cause running problems, such as:

•Too low engine temperature.

•Icing on the air filter and carburetor.

Therefore some special measures are required:

The cooling system consists of:

1.Air intake on the starter unit.

2.Air guide plate.

3.Fan blades on the flywheel.

4.Cooling fins on the cylinder.

5.Cylinder cowling (supplies cold air over the cylinder).

5

4

3

2

1

•Partly reduce the air inlet of the starter and by doing that increase the engine temperature.

•Preheat the intake air to the carburetor by removing the special plug between the cylinder and the carburetor space.

The cylinder cover is made so it can be changed for running in cold weather. There is a possibility to make a hole in which, during the warmer part of the year, should be sealed using a plug.

Temperature 0oC (32oF) or colder

Clean the cooling system with a brush once a week, more often in demanding conditions. A dirty or blocked cooling system results in the saw overheating which causes damage to piston and cylinder.

Centrifugal cleaning ”Air Injection”

Centrifugal cleaning means the following:

All air to the carburetor is carried through the starter. Dirt and dust is centrifuged away by the cooling fan.

IMPORTANT! In order to keep the function of the centrifugal cleaning, a continous maintenance and care must be made.

•Clean the air intake to the starter, the fan wings of the

flywheel, the space around the flywheel, inlet pipe and carburetor space.

Move the cover from position A to position B so that preheated air can pass from the cylinder to the carburetor space and prevent formation of ice in the air filter. NOTE! When the cover is placed in the air nozzle it is important that the air nozzle seals hermetically to the cylinder cover.

When the cover is mounted in position A, it must be turned with the cut towards the air filter. To make a proper centrifugal cleaning possible, the air nozzle must seal hermetically to the crankcase and cylinder cover.

Temperature -5oC (23oF) or colder

For running the saw in cold weather or powder snow, a special cover is available, which is mounted on the starter housing. This reduces the air flow and prevents large amounts of snow from being sucked in.

IMPORTANT! If a special winter kit is assembled or measures are taken to increase the engine temperature, a readjustment to normal setting has to be done when the saw is used under normal conditions. Otherwise, there is a risk of overheating, which can cause severe engine damage.

IMPORTANT! Any maintenance other than that described in this manual must be carried out by your servicing dealer.

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Contents 261 101 90KEY to Symbols SymbolsContents Personal Protective Equipment Safety InstructionsChain SAW Safety Equipment Chain brake and front hand guard Right hand guard Throttle lockChain catcher Muffler Stop switchVibration damping system Checking brake band wear Checking the front hand guardChecking the inertia brake release Checking the brake triggerThrottle lock Cutting Equipment 5 basic rulesCutting equipment designed to minimise kickback BarSaw chain Some terms that describe the bar and chainSharpening cutting teeth Sharpening your chain and adjusting raker clearanceGeneral information on sharpening cutting teeth Tensioning the chain General advice on setting raker clearanceSetting the raker clearance Filling with chain oil Lubricating cutting equipmentChain oil Checking chain lubrication Lubricating the clutch drum bearingChecking wear on cutting equipment Lubricating the bar tip sprocketHOW to Avoid Kickback What is kickback?General rules Do not let go of the handles10 ft General Safety PrecautionsMin m Basic safety rules General Working InstructionsBasic cutting technique GeneralTerms CuttingTree felling technique Safe distanceLimbing Felling directionClearing the trunk and preparing your retreat FellingFreeing a tree that has fallen badly = high accident risk Cutting the trunk into logsFreeing a Trapped tree Cutting trees and branches that are in tension PreparationsWhat is WHAT? Assembly Mounting guide bar and chainFuel Handling Fuelmix10ft FuellingMin 3 m Start and Stop StartCold engine Warm engineMaintenance CarburetorStarter device assembly Starter deviceChanging a broken or worn starter cord Tensioning the recoil springAdjustment of the oil pump Needle bearing maintenanceAir filter MufflerCentrifugal cleaning Air Injection Temperature 0oC 32oF or colderTemperature -5oC 23oF or colder Cooling systemWeekly maintenance Daily maintenance Monthly maintenanceTechnical Data 261Federal Emission Control Warranty Statement Your Warranty Rights Obligations1998W48

261 specifications

The Husqvarna 261 is a robust and versatile chainsaw designed for professional use, particularly appealing to forestry workers, and those engaged in tree care and maintenance. This model stands out for its balance of power and lightweight design, making it an excellent choice for those who need a reliable tool for extended use.

One of the standout features of the Husqvarna 261 is its efficient 50.1cc engine, which delivers impressive cutting performance while maintaining low fuel consumption. This model incorporates a X-Torq engine technology that reduces emissions, making it an environmentally friendly option that complies with stringent regulations. Users can benefit from increased torque over a wide RPM range, resulting in optimal cutting performance even in tough conditions.

Another significant characteristic of the Husqvarna 261 is its LowVib technology. This system effectively reduces vibrations, allowing operators to work longer with minimal fatigue. The ergonomic design of the chainsaw, combined with a comfortable grip, further enhances user control and reduces strain during operation.

Safety is a priority in the design of the Husqvarna 261. It is equipped with an inertia chain brake that stops the chain immediately in case of kickback, protecting the user from potential injury. The chainsaw also features an adjustable oil pump, allowing for precise lubrication of the chain according to the user's specific needs, thus prolonging the life of both the chain and the guide bar.

The air filtration system is another key feature that sets the Husqvarna 261 apart. The innovative design includes a three-piece air filter that effectively keeps dust and debris from entering the engine, ensuring long-lasting performance and reduced maintenance. Furthermore, the quick-release cover allows for easy access to the air filter and spark plug, simplifying routine maintenance tasks.

Overall, the Husqvarna 261 combines advanced technology with user-friendly features, making it a standout choice for professionals who require reliability and performance. Its robust design, coupled with safety features and efficient engine technology, ensures that it can handle the demanding tasks across various cutting applications, establishing it as a preferred tool in the chainsaw market. Whether for logging, landscaping, or general tree work, the Husqvarna 261 is engineered to meet and exceed the expectations of discerning users.
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