Husqvarna 372XP, 365 manual Maintenance, Carburettor

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MAINTENANCE

Carburettor

Function, Basic settings, Fine adjustment

WARNING! Do not start the chain saw unless

!the bar, chain and clutch cover (chain brake) are fitted, otherwise the clutch may come loose and cause personal injury.

Function

•The carburettor governs the engine’s speed via the throttle control. Air and fuel are mixed in the carburettor. The air/fuel mixture is adjustable. Correct adjustment is essential to get the best performance from the machine.

•Adjusting the carburettor means that the engine is adapted to local operating conditions, e.g. climate, altitude, petrol and the type of 2-stroke oil.

•The carburettor has three adjustment controls:

-L = Low speed jet

-H = High speed jet

-T = Idle adjustment screw

TH

L

•The L and H-jets are used to adjust the supply of fuel to match the rate that air is admitted, which is controlled with the throttle. If they are screwed clockwise the air/fuel ratio becomes leaner (less fuel) and if they are turned anti- clockwise the ratio becomes richer (more fuel). A lean mixture gives a higher engine speed and a rich mixture gives a lower engine speed.

•The T-screw regulates the throttle setting at idle speed. If the T-screw is turned clockwise this gives a higher idle speed; turning it anti-clockwise gives a lower idle speed.

Basic settings and running in

The basic carburettor settings are adjusted during testing at the factory. The basic settings are H = 1 turn and L = 1 turn.

To provide the engine’s components with good initial lubrication (during running in) the carburettor should be set for a richer fuel mixture for the first 3-4 hours that the chain saw is in use. To do this, adjust the fast idle speed to 600-700 rpm below the recommended max. fast idle speed.

If you are unable to check the fast idle speed using a tachometer the H-jet should not be set for a leaner mixture than given in the basic settings. The recommended max. fast idle speed must not be exceeded.

CAUTION! If the chain rotates while idling the T-screw must be turned anti-clockwise until the chain stops.

Fine adjustment

When the machine has been ”run-in” the carburettor should be finely adjusted. The fine adjustment should be carried out by a qualified person. First adjust the L-jet, then the idling screw T and then the H-jet. The recommended engine speeds are as follows:

 

Max. fast idle speed, rpm

Idle speed, rpm

362XP

13500

2700

365

12500

2700

372XP

13500

2700

Changing the type of fuel

Fine tuning may be required if the chain saw, after changing the type of fuel, performs differently with regard to starting, acceleration, max. speed, etc.

Conditions

•Before any adjustments are made the air filter should be clean and the cylinder cover fitted. Adjusting the carburettor while a dirty air filter is in use will result in a leaner mixture next time the filter is cleaned. This can give rise to serious engine damage.

•Carefully turn the L and H-jets clockwise as far as they will go. Now turn the jets one turn anti-clockwise. The carburettor is now set to H = 1 and L = 1.

•Now start the machine according to the starting instructions and let it warm up for 10 minutes. CAUTION!

If the chain rotates while idling the T-screw must be turned anti-clockwise until the chain stops.

•Place the machine on a flat surface so that the bar points away from you and so that the bar and chain do not come into contact with the surface or other objects.

Low speed jet L

+ 1/4

L

Try to find the highest idle speed by turning the low speed jet L clockwise then anti-clockwise. When the highest speed has been found, turn the low speed jet L 1/4 turn anti-clockwise.

CAUTION! If the chain rotates while idling the T-screw must be turned anti-clockwise until the chain stops.

Fine adjustment of the idle speed T

Adjust the idle speed with the T-screw. If it is necessary to re- adjust, turn the T-screw clockwise while the engine is running, until the chain starts to rotate. Then turn anti-clockwise until the chain stops. When the idle speed is correctly adjusted the engine should run smoothly in every position and the engine speed should be safely below the speed at which the chain starts to rotate.

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Contents 362XP 365 372XP Key to symbols KEY to SymbolsContents Personal protective equipment Safety InstructionsMachine′s safety equipment Chain brake and front hand guard Throttle lock Stop switchChain catcher Right hand guardChecking brake band wear MufflerChecking the front hand guard Checking the inertia brake releaseThrottle lock Stop switchChain catcher Right hand guardGeneral rules Cutting equipmentCutting equipment designed to minimise kickback MufflerSome terms that describe the bar and chain ChainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting raker clearanceSharpening cutting teeth With a badly sharpened chainSetting the raker clearance General advice on setting raker clearanceTensioning the chain If the raker clearance is too largeChain oil Lubricating cutting equipmentFilling with chain oil Checking chain lubricationNeedle bearing lubrication Lubricating the bar tip sprocketChecking wear on cutting equipment Chain drive sprocketDo not let go of the handles How to avoid kickbackWhat is kickback? General safety precautions Transport and storage Fuel safetyStarting General working instructions Basic safety rulesBasic cutting technique GeneralCutting TermsLimbing Tree felling techniqueSafe distance Felling directionFelling cut FellingDirectional cuts Freeing a tree that has fallen badly General adviceCutting the trunk into logs Freeing a trapped treeWhat is what on the chain saw? What is WHAT?Fitting the bar and chain AssemblyFitting a spike bumper Working with the chainFuel Fuel HandlingMin 3 m 10ft FuellingStarting and stopping Starting and StoppingCold engine Warm engineStopping Carburettor MaintenanceStarter Correctly adjusted carburettorHigh speed jet H Changing a broken or worn starter cordSpark plug Air filterTensioning the recoil spring Changing a broken recoil springWhen making adjustments Adjustment of the oil pumpMuffler Needle bearing lubricationHeated handles Air Injection centrifugal cleaningElectrical carburettor heating Winter useWeekly maintenance Daily maintenanceMonthly maintenance Below you will find some general maintenance instructionsTechnical data Technical DataBar Chain Bar and chain combinationsEN292-2, Cispr 121997, EN608 EC-declaration of conformityApplies to Europe only ´z+H4¶6j¨ Page 1140206-26 ´z+H4¶6j¨ ´z+H4¶6j¨
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372XP, 365 specifications

The Husqvarna 365 and 372XP chainsaws are powerful and versatile tools designed for both professional loggers and serious homeowners. Known for their robust construction and reliability, these models offer a perfect blend of performance and user-friendly features.

The Husqvarna 365 is equipped with a 70.7 cc engine that delivers impressive power, making it suitable for demanding cutting tasks. This chainsaw is designed for all-day use, ensuring that operators can tackle large trees and tough woods without losing momentum. The engine utilizes Smart Start technology, which allows for easier starting with minimal effort. This innovation reduces the resistance in the starter cord by up to 40%, enabling rapid and hassle-free ignition.

On the other hand, the Husqvarna 372XP boasts a slightly larger 72.2 cc engine, making it one of the most powerful saws in the market. Specifically tailored for professionals, this chainsaw excels in heavy-duty applications and has the ability to handle extreme workloads. Both models are designed with a high RPM, ensuring smooth cutting performance and efficient chip flow, which contributes to cleaner cuts and enhanced productivity.

A significant feature of these chainsaws is their ergonomic design, which includes a comfortable handle for better grip and control during operation. The chainsaws also feature an adjustable oil pump that allows users to customize the oil flow for the chain and bar, which helps minimize wear and prolongs the lifespan of the saw.

Safety is paramount with both the 365 and 372XP models. They are equipped with a chain brake system that automatically stops the chain in the event of kickback, ensuring user protection. Furthermore, the low vibration technology significantly reduces vibrations experienced by the operator, promoting comfort during prolonged use.

In terms of maintenance, both chainsaws come with a quick-release air filter that makes it easy to access and clean, ensuring optimal engine performance over time. The built-in fuel pump facilitates easier starting after long periods of inactivity, making these tools reliable for various cutting tasks.

In summary, the Husqvarna 365 and 372XP chainsaws stand out for their powerful engines, user-friendly features, and advanced safety technologies. They are engineered to meet the high demands of professional users while also being accessible for those who need a reliable chainsaw for home use. Whether for felling trees or limbing, these models deliver excellence in performance and durability.
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