Husqvarna Understanding 254XP Air Injection and Maintenance Techniques for Optimal Chainsaw Performance
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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 carburettor.

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 carburettor by removing the special plug between the cylinder and the carburettor 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

254

Model 254: Turn the cover lid so that the preheated air

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 carburettor 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.

from the cylinder can pass into the carburettor area preventing for instance icing on the air filter.

Model 257, 262: Move the cover from position A to position B so that preheated air can pass from the cylinder to the carburettor space and prevent forma- tion 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.

Temperature -5oC (23oF) or colder

•Clean the air intake to the starter, the fan wings of the flywheel, the space around the flywheel, inlet pipe and carburettor space.

Heated handles

On the model XPG both the front handle and the rear handle are equipped with electrical heating coils. These are supplied with electricity from a built-in generator in the

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.

257, 262

electrical system. The switch for the heating coils is placed to the right of the rear handle. When the switch is pushed to the right, the heat is switched on. When it is pushed to the left, the heat is switched off.

Model 257, 262: 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.

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

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Contents 254XP/257/262XP 101 88Symbols in the operator’s manual KEY to SymbolsSymbols on the chain saw Contents 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 automatic brake 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 Lubricating cutting equipment Chain oilFilling with chain oil Never use waste oilChecking chain lubrication Lubricating the clutch drum bearingChecking wear on cutting equipment Lubricating the bar tip sprocketHOW to Avoid Kickback What is kickback?Never use the saw one- handed General rulesDo not let go of the handles 10 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 FellingGeneral advice Freeing a tree that has fallen badly = high accident riskCutting the trunk into logs Freeing a Trapped treeWhat is WHAT? Fitting a spike bumper AssemblyMounting guide bar and chain Fuel Handling Fuelmix10ft FuellingMin 3 m Start and Stop StartCold engine Warm engineMaintenance CarburettorStarter device assembly Starter deviceChanging a broken or worn starter cord Tensioning the recoil springAdjustment of the oil pump Needle bearing maintenanceAir filter Spark plugCentrifugal cleaning Air Injection Cooling systemWinter use Heated handlesWeekly maintenance Daily maintenance Monthly maintenanceBar and chain combinations Technical Data254XP 257 262XP Fuel and lubrication

254XP, 257, 262XP, 354XP, 257, 262XP specifications

Husqvarna is a well-respected name in the world of outdoor power equipment, especially when it comes to chainsaws. Among its lineup, the models 254XP, 257, 262XP, and 354XP stand out for their robust performance and innovative technologies, catering to both professional and amateur users.

The Husqvarna 254XP is known for its high power-to-weight ratio, making it a favorite among professionals who require portability without sacrificing performance. It features a 2.3 kW engine, providing ample power for a variety of cutting tasks. The chainsaw is equipped with a robust air injection system that removes larger debris before it reaches the air filter, helping to maintain engine performance and extend service intervals.

Similar to the 254XP, the Husqvarna 257 offers strong performance, but with enhancements tailored for even greater efficiency. It boasts an efficient combustion system, ensuring lower fuel consumption and reduced emissions, making it environmentally friendly. Another standout feature is the LowVib technology, which minimizes vibrations, making it easier for operators to work for extended periods without fatigue.

The Husqvarna 262XP takes a step further in terms of power and efficiency, featuring a 3.2 kW engine. This model is designed for heavy-duty tasks and is appreciated in the logging industry. Its advanced ignition system ensures quick starts and stable operation, even in challenging conditions. The X-Torq engine technology reduces fuel consumption and emissions, making it a green choice for professionals.

The 354XP is engineered for those who require a balance of power and weight. With a cutting capacity that satisfies both casual users and professionals, it delivers 2.9 kW of power. The chainsaw’s design incorporates features like the automatic chain lubrication system, ensuring optimal oil flow to the bar and chain, which prolongs their lifespan.

In terms of ergonomics, all these models come with comfort-grip handles and adjustable oil pumps, allowing for ease of use and control during operation. Their starting mechanisms are user-friendly, often featuring a decompression valve for easier pull starts.

These Husqvarna models exemplify the brand's commitment to merging power, efficiency, and user comfort. Whether tackling small projects or heavy-duty logging, the 254XP, 257, 262XP, and 354XP offer dependable solutions that meet the demands of today’s users.
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