Jonsered CS 2147 manual Starter, Fine adjustment of the idle speed T, High speed jet H

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MAINTENANCE

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.

WARNING! Contact your service agent, if the

!idle speed setting cannot be adjusted so that the chain stops. Do not use the chain saw until it has been properly adjusted or repaired.

High speed jet H

•The high speed jet H influences the power and engine speed of the machine. If the high speed jet is set too rich (H-jet screwed in too far) the machine will over-rev and this will damage the engine. Run the machine at full throttle for about 10 seconds. Then turn the H-jet 1/4 turn anti- clockwise. Run the machine at full throttle for another 10 seconds or so and listen to the difference in the fast idle speed. Repeat this procedure with the H-jet turned a further 1/4 turn anti-clockwise.

H

•You have now run the machine at settings of H =± 0, H=+1/ 4, H=+1/2 relative to the basic settings. At full throttle the engine has sounded different for each setting. The H-jet is correctly adjusted when the machine burbles a little. If the machine ”screams” then the machine is set too lean. If the muffler emits a lot of smoke and the machine burbles a lot then the setting is too rich. Turn the H-jet clockwise until the setting sounds right

CAUTION! To ensure correct adjustment you should enlist a qualified mechanic who has access to a tachometer. The recommended maximum fast idle speed must not be exceeded.

Correctly adjusted carburettor

When the carburettor is correctly adjusted the machine accelerates without hesitation and burbles a little at full throttle. 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. If the L and H-jets are set too rich it will lead to acceleration problems or too low a working speed.

Starter

WARNING! When the recoil spring is wound

!up in the starter housing it is under tension and can, if handled carelessly, pop out and cause personal injury. Always be careful when changing the recoil spring or the starter cord. Always wear protective goggles.

Changing a broken or worn starter cord

•Loosen the screws that hold the starter against the crankcase and remove the starter.

•Pull out the cord approx. 30 cm and hook it into the notch in the rim of the pulley. Release the recoil spring by letting the pulley rotate slowly backwards.

•Undo the screw in the centre of the pulley and remove the pulley. Insert and fasten a new starter cord to the pulley. Wind approx. 3 turns of the starter cord onto the pulley.

Connect the pulley to the recoil spring so that the end of the spring engages in the pulley. Fit the screw in the centre of the pulley. Insert the starter cord through the hole in the starter housing and the starter handle. Make a secure knot in the end of the starter cord.

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Contents Operator′s manual Key to symbols KEY to SymbolsContents Machine′s safety equipment Safety InstructionsPersonal protective equipment Chain brake and hand guard Right hand guard Stop switchThrottle lock Chain catcherChecking brake band wear MufflerChecking the hand guard Chain catcher Checking the inertia brake releaseChecking the brake trigger Throttle lockVibration damping system Stop switchCutting equipment General rulesSome terms that describe the bar and chain Cutting equipment designed to minimise kickbackBar ChainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting raker clearanceWith a badly sharpened chain Sharpening cutting teeth General advice on setting raker clearanceSetting the raker clearance Tensioning the chainChecking chain lubrication Lubricating cutting equipmentChain oil Filling with chain oilChain drive sprocket Lubricating the bar tip sprocketNeedle bearing lubrication Checking wear on cutting equipmentWhat is kickback? How to avoid kickbackDo not let go of the handles General safety precautions Starting Fuel safetyGeneral working instructions Basic safety rulesTransport and storage Cutting Basic cutting techniqueGeneral TermsFelling direction Tree felling techniqueLimbing Safe distanceFelling cut Clearing the trunk and preparing your retreatFelling Directional cutsCutting the trunk into logs Cutting trees and branches that are in tension General adviceFreeing a tree that has fallen badly Freeing a trapped treeWhat is what on the chain saw? What is WHAT?Working with the chain AssemblyFitting the bar and chain Fitting a spike bumperFuel Fuel HandlingFollowing applies to chain saws with catalytic converters Fuelling Chain oilWarm engine Starting and StoppingStarting and stopping Cold engineStopping Carburettor MaintenanceHigh speed jet H Fine adjustment of the idle speed TCorrectly adjusted carburettor StarterChanging a broken recoil spring Air filterSpark plug Tensioning the recoil springNeedle bearing lubrication Adjustment of the oil pumpWhen making adjustments MufflerWinter use Centrifugal cleaning TurboHeated handles CS 2147W, CS 2152W Electrical carburettor heating CS 2147WH, CS 2152WHBelow you will find some general maintenance instructions Daily maintenanceWeekly maintenance Monthly maintenanceTechnical data Technical DataBar and chain combinations Applies to Europe only EC-declaration of conformityCispr 121997, EN608 Page 1088890-26
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