Husqvarna 346XP 351 manual Air filter, Muffler, Needle bearing maintenance Spark plug

Page 31

MAINTENANCE

Air filter

The air filter must be regularly cleaned from dust and dirt in order to avoid:

•Carburettor malfunctions

•Starting problems

• Engine power reduction

• Unnecessary wear on the engine parts

• Abnormal fuel consumption

Clean the air filter daily or more often if the air is exceptionally dusty in the working area.

•Disassemble the air filter by

removing the cylinder cover and unscrew the filter. When reassembling, make sure that the filter is tight against the filter holder. Clean the filter by brushing or shaking it.

• A more thorough cleaning of the filter is obtained by washing it in water and soap.

An air filter, which is used for some time, cannot be cleaned completely. Therefore it must be replaced by a new one, with regular intervals.

IMPORTANT! A damaged air filter must always be replaced.

A Husqvarna chain saw can be equipped with different types of airfilter according to working and weather conditions, season etc.

Muffler

The muffler is designed in order to reduce the noise level

and to direct the exhaust

gases away from the operator. The exhaust gases are hot

and can contain sparks, which

may cause fire if directed against dry and combustible

material. Some mufflers are equipped with a special screen.

If your saw has this type of muffler, you should clean the screen at least once a week. This is done with a wire brush.

CAUTION! The screen must be replaced, if damaged. The saw will be overheated, if the screen is clogged. This results in damage on the cylinder and the piston. Never use a saw with a clogged or defective muffler.

A muffler fitted with a catalytic converter greatly reduces the concentration of hydrocarbons (HC), oxides of nitrogen (NO) and aldehydes emitted with exhaust gases. However, it does not cut down carbon monoxide (CO), which you cannot smell! Consequently, never work in an enclosed or badly ventilated area. Good air circulation should always prevail when working in snowy hollows, ravines or in confined conditions.

WARNING!

The catalytic converter muffler gets very hot during and after use. This also applies during idling. Be aware of the fire hazard, especially when handling the saw near flammable substances or vapours.

Needle bearing maintenance

Spark plug

The spark plug condition is influenced by:

•An incorrect carburettor setting.

•Wrong fuel mixture (too much oil in the petrol).

•A dirty air filter.

These factors cause deposits on the spark plug electrodes, which may result in malfunction and starting difficulties.

If the engine is low on

0,5 mm

power, difficult to start or

 

runs poorly at idling speed,

 

always check the spark plug

 

first. If the spark plug is dirty,

 

clean it and check the

 

electrode gap. Readjust if

 

necessary. The correct gap is

 

0,5 mm (0,020"). The spark

 

plug should be replaced after

 

about a month in operation or

 

earlier if the electrodes are

 

badly eroded.

 

IMPORTANT! Always use the recommended spark plug type. An incorrect spark plug can severely damage the piston/cylinder.

The clutch drum is equipped with one of the following chain sprockets:

•Spur sprocket (A) (the chain sprocket is welded on the drum)

•Rim sprocket (B) (exchangeable)

Both versions have built-in needle bearing at the drive shaft, whitch has to be greased regularly (once a week).

NOTE! Use only high quality bearing grease.

A

B

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Contents English 346XPSymbols KEY to SymbolsContents Personal Protective Equipment Safety Instructions3a Starting Chain brake and front hand guardChain catcher Throttle lockRight hand guard Vibration damping system Stop switchMuffler Checking the brake trigger Checking brake band wearChecking the front hand guard Checking the inertia brake releaseThrottle lock 5 basic rules Cutting EquipmentSome terms that describe the bar and chain Cutting equipment designed to minimise kickbackBar Saw chainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting raker clearanceSharpening cutting teeth Setting the raker clearance General advice on setting raker clearanceTensioning the chain Chain oil Lubricating cutting equipmentFilling with chain oil Lubricating the bar tip sprocket Needle bearing maintenanceChecking chain lubrication Checking wear on cutting equipmentWhat is kickback? HOW to Avoid KickbackDo not let go of the handles General rulesGeneral Safety Precautions Min m Basic safety rules10 ft Cutting Basic cutting techniqueGeneral TermsFelling direction Tree felling techniqueSafe distance LimbingFelling Clearing the trunk and preparing your retreatCutting trees and branches that are in tension Preparations Freeing a tree that has fallen badly = high accident riskCutting the trunk into logs Freeing a Trapped treeWhat is what? What is WHAT?Mounting guide bar and chain AssemblyFitting a spike bumper Fuelmix Fuel Handling10ft FuellingChain oil Min 3 mStop Start and StopStart and stop StartCarburettor MaintenanceTensioning the recoil spring Starter device assemblyStarter device Changing a broken or worn starter cordAir filter Needle bearing maintenance Spark plugMuffler Winter use Adjustment of the oil pump Heated handles 346XPG, 351GCentrifugal cleaning Air Injection Cooling systemMonthly maintenance Weekly maintenance Daily maintenance346XP 351 Technical DataBar Chain Bar and chain combinations2001W49 114 00

346XP 351 specifications

The Husqvarna 346XP and 351 chainsaws are celebrated models within the Husqvarna lineup, recognized for their excellence in performance, efficiency, and ease of use. Designed predominantly for professional use, these chainsaws incorporate advanced technology and ergonomic features that cater to the needs of tree care specialists, landscapers, and serious woodworkers.

One of the standout features of the Husqvarna 346XP is its lightweight design, which allows for easy maneuverability and reduced fatigue during extended use. Weighing around 10.8 pounds, the chainsaw is equipped with a powerful 50.1cc, 2.8 horsepower engine, delivering exceptional cutting performance while maintaining efficient fuel consumption. The model comes equipped with a 15 to 18-inch guide bar, providing versatility for various cutting tasks, from limbing to felling small trees.

The 351 model offers similar performance metrics but is designed slightly differently, featuring an improved air injection system for cleaner operation. This system actively collects debris before it reaches the air filter, extending the service intervals and enhancing engine life. The powerful 51.7cc engine on the 351 provides a higher power output compared to the 346XP, suited for even the most demanding cutting jobs.

Both chainsaws utilize Husqvarna’s X-Torq engine technology, which reduces fuel consumption by up to 20% while lowering emissions. This not only promotes environmental sustainability but also translates into cost savings for users. The LowVib technology integrated into both models minimizes vibrations, ensuring a more comfortable experience and reducing operator fatigue.

Enhanced safety features are also paramount in both chainsaws. The inertia-activated chain brake activates quickly in the event of a kickback, providing an additional layer of protection. An adjustable oil pump allows users to control the lubrication rate, optimizing the chainsaw's performance based on the type of work being performed.

The ergonomic design of the handles enhances grip and control, allowing for precision cutting. These chainsaws are user-friendly, catering to both experienced operators and those new to chainsaw work. Overall, the Husqvarna 346XP and 351 represent a perfect blend of power, technology, and comfort, making them reliable choices for professional and serious amateur users alike.
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