Husqvarna 1151438-95, 353 EPA III TrioBrake manual High speed jet H, Correctly adjusted carburetor

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MAINTENANCE

High speed jet H

At the factory the engine is adjusted at sea level. When working at a high altitude or in different weather conditions, temperatures and atmospheric humidity, it may be necessary to make minor adjustments to the high speed jet.

CAUTION! If the high speed jet is screwed in too far, it may damage the piston/cylinder.

When test run at the factory, the high speed jet is set so that the engine satisﬁes the applicable legal requirements at the same time as achieving maximum performance. The carburetor’s high speed jet is then locked using a limiter cap in the fully screwed out position. The limiter cap limits the potential to adjust the high speed jet to at most half a turn.

Correctly adjusted carburetor

When the carburetor is correctly adjusted the machine accelerates without hesitation and the machine 4-cycles a little at max. speed. It is also important that the chain does not rotate at idle. If the L-jet is set too lean it may cause starting difﬁculties and poor acceleration. If the H-jet is set too lean the machine will have less power, poor acceleration and could suffer damage to the engine.

Checking, maintaining and servicing chain saw safety equipment

Note! All servicing and repair work on the machine requires special training. This is especially true of the machine′s safety equipment. If your machine fails any of the checks described below we recommend you to contact our servicing dealer.

Chain brake and front hand guard

Checking brake band wear

Brush off any wood dust, resin and dirt from the chain brake and clutch drum. Dirt and wear can impair operation of the brake.

Regularly check that the brake band is at least 0.024 inch (0.6 mm) thick at its thinnest point.

Checking the front hand guard

Make sure the front hand guard is not damaged and that there are no visible defects such as cracks.

Move the front hand guard forwards and back to make sure it moves freely and that it is securely anchored to the clutch cover.

Checking the inertia brake release

With the engine turned off, hold the chain saw over a stump or other ﬁrm object. Let go of the front handle so that the bar drops towards the stump as the chain saw rotates around the rear handle.

When the bar hits the stump the brake should be applied.

32 – English

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Contents EPA III TrioBrake Symbols in the operator’s manual KEY to SymbolsSymbols on the machine You will ﬁnd the following labels on your chain saw EPAContents Introduction Dear customerWhat is WHAT? What is what on the chain saw?Always use common sense General Safety PrecautionsBefore using a new chain saw Chain brake and front hand guard Machine′s safety equipmentPersonal protective equipment General Safety Precautions Throttle lockout Chain catcherRight hand guard Vibration damping systemStop switch Cutting equipmentMufﬂer General rulesSharpening your chain and adjusting depth gauge setting Cutting equipment designed to reduce kickbackGeneral advice on adjusting depth gauge setting If the depth gauge setting is too largeAdjustment of depth gauge setting Tensioning the chainBar and cause serious or even fatal injury 346XP TrioBrake, 353 TrioBrakeChecking chain lubrication Lubricating cutting equipmentFilling with chain oil Checking wear on cutting equipment Chain drive sprocketNeedle bearing lubrication Assembly Fitting the bar and chain346XP TrioBrake, 353 TrioBrake 345e TrioBrakeAssembly Fuel Handling FuelFuel safety FuelingTransport and storage Long-term storageStarting and Stopping Starting and stoppingCold engine Warm engineStopping Basic safety rules Working TechniquesBefore use General working instructionsGeneral rules Limbing Basic cutting techniqueTerms Cutting Tree felling technique Safe distanceFelling direction Clearing the trunk and preparing your retreatDirectional cuts Felling cutGeneral advice Freeing a tree that has fallen badlyFreeing a trapped tree Cutting trees and branches that are in tensionCutting the trunk into logs How to avoid kickbackWhat is kickback? General MaintenanceCarburetor adjustment Correctly adjusted carburetor High speed jet HChecking the right-hand brake trigger Checking the brake triggerMufﬂer Starter Changing a broken or worn starter cordTensioning the recoil spring 345eReplacement of broken recoil and drive disc springs Air ﬁlterSpark plug Fitting the starterAdjustment of the oil pump When making adjustmentsLubricating the bar tip sprocket Needle bearing lubricationAir Injection centrifugal cleaning Temperature 0C 32F or colderHeated handles Electrical carburetor heatingMaintenance schedule Daily maintenance Weekly maintenance Monthly maintenanceTechnical Data Technical dataBar and chain combinations Saw chain ﬁling and ﬁle gauges050/1,3 mm 058/1,5 mmFederal Emission Control Warranty Statement ObligationsAmerican Standard Safety Precautions Safety precautions for chain saw usersKickback safety precautions Other safety precautions1151438-95