Jonsered CS 2145 EPA II, CS 2150 EPA I, CS 2141 EPA II manual Maintenance, Carburettor

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MAINTENANCE

Carburettor

Your Jonsered product has been designed and manufactured to specifications that reduce harmful emissions.

After your unit has been run 8-10 tanks of fuel the engine has broken in. To ensure that your unit is at peak performance and producing the least amount of harmful emissions after break in, have your authorized servicing dealer, who has a revolution counter at his disposal, to adjust your carburetor for optimum operating conditions.

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.

•The setting of the carburetor means that the engine is adepted to local conditions, for example, the climate, altitude, fuel 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

LH

T

•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 carburettor is set to its basic setting when test run at the factory. The basic setting is richer than the optimum setting and should be maintained for the first hours that the machine is in use. The carburettor should then be finely adjusted. Fine adjustment should be carried out by a suitably trained person.

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

Rec. idle speed: 2700 rpm

WARNING! Contact your servicing dealer, 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.

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.

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 needle to the mid point.

•Do not attempt to adjust the L and H jets beyond either stop as this could cause damage.

•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

Turn the low speed jet L clockwise until it stops. If the engine accelerates poorly or idles unevenly, turn the low speed jet L anticlockwise until good acceleration and idling are achieved.

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

Final setting of the idling 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 counter-clockwise until the chain stops. A correctly adjusted idle speed setting occors when the engine runs smoothly in every position. It should also be good margin to the rpm when the chain starts to rotate.

WARNING! Contact your servicing dealer, 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 needle H influence the power of the machine. A too lean adjusted high speed (high speed needle H turn too much clockwise) gives overrevs and damages the engine. Do not allow the engine to run at full speed for more than 10 seconds. Turn the high speed needle H counter- clockwiseuntil the stop. If the engine runs roughly, turn the high speed needle slowly the minimum amount clockwise until the engine runs smoothly. The high speed needle H is correctly set when the saw “4-cycles” a little. If the machine

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Contents EPA KEY to Symbols Key to symbolsContents Before using a new chain saw EPAMachine′s safety equipment Safety InstructionsPersonal protective equipment Chain brake and front hand guard Stop switch Throttle lockChain catcher Right hand guardMuffler Checking brake band wearChecking the front hand guard Checking the inertia brake releaseStop switch Throttle lockChain catcher Right hand guardCutting equipment General rulesCutting equipment designed to minimise kickback BarSharpening your chain and adjusting raker clearance Some terms that describe the bar and chainGeneral information on sharpening cutting teeth With a badly sharpened chainGeneral advice on setting raker clearance Sharpening cutting teethSetting the raker clearance Tensioning the chainLubricating cutting equipment Chain oilFilling with chain oil Checking chain lubricationLubricating the bar tip sprocket Needle bearing lubricationWhat is kickback? How to avoid kickbackChain drive sprocket Do not let go of the handles General safety precautions StartingFuel safety Basic safety rulesGeneral working instructions Transport and storageBasic cutting technique GeneralTerms CuttingTree felling technique LimbingSafe distance Felling directionClearing the trunk and preparing your retreat FellingDirectional cuts Felling cutGeneral advice Freeing a tree that has fallen badlyCutting the trunk into logs Freeing a trapped treeWhat is WHAT? What is what on the chain saw?Assembly Fitting the bar and chainFuel Fuel HandlingChain oil Fuelling Starting and Stopping Starting and stoppingCold engine Warm engineMaintenance CarburettorCorrectly adjusted carburettor StarterChanging a broken or worn starter cord Tensioning the recoil springAir filter Spark plugMuffler Fitting the starterAdjustment of the oil pump Centrifugal cleaning TurboWhen making adjustments Needle bearing lubricationDaily maintenance Temperature 0 C 32 F or colderTemperature -5C 23 F or colder Below you will find some general maintenance instructionsWeekly maintenance Monthly maintenanceTechnical Data Technical dataBar Chain Length Pitch, inch Max nose radius Inches 050/1,3 mm058/1,5mm 063/1,6 mmFederal Emission Control Warranty Statement Your Warranty Rights and Obligations1088895-95

CS 2141 EPA II, CS 2145 EPA II, CS 2150 EPA I specifications

The Jonsered CS 2150 EPA I, CS 2145 EPA II, and CS 2141 EPA II are premium chainsaws engineered for both professional users and serious enthusiasts. These models exemplify Jonsered's commitment to power, efficiency, and user-friendly design, making them ideal for a variety of cutting tasks, from felling trees to trimming branches.

The Jonsered CS 2150 EPA I is a robust chainsaw that offers a powerful engine combined with advanced features. It boasts a 50.2 cc engine that delivers exceptional cutting performance while adhering to strict EPA emissions standards. The chainsaw is equipped with the X-Torq engine technology, which significantly reduces fuel consumption and emissions, enabling users to work longer while minimizing environmental impact. Additionally, the CS 2150 features a high chain speed of 22.3 m/s, allowing for swift and clean cuts.

The CS 2145 EPA II further enhances performance with its lightweight design, making it easy to maneuver for prolonged use without fatigue. Powered by a 45.7 cc engine, it combines efficiency with raw power, providing reliable performance for both professionals and homeowners. The inclusion of an easy-start system means that users can start the saw with minimal effort, which is especially advantageous during colder weather or when working in challenging environments. Its validated safety features, including a chain brake and low kickback bar, ensure user protection during operation.

The CS 2141 EPA II offers a perfect balance of power and manageability. With a smaller 40.9 cc engine, it is particularly suited for users looking for an efficient saw that doesn't compromise on performance. The lightweight design allows for easy handling, particularly in dense and difficult terrain. Like the other models, it utilizes the X-Torq engine technology, which ensures reduced emissions and optimal fuel efficiency. Its precise design and ergonomic handle make it comfortable for extended periods of use, catering to both professional loggers and landscape maintenance users.

Each of these models shares characteristics such as an efficient air filtration system, which prolongs engine life by keeping dirt and debris out. In addition, they are designed with vibrations dampening technology, reducing fatigue for the user. The easy access to the filter and spark plug simplifies maintenance, ensuring the chainsaws remain in peak condition.

In conclusion, the Jonsered CS 2150 EPA I, CS 2145 EPA II, and CS 2141 EPA II represent a solid lineup of chainsaws that combine power, efficiency, and safety. With advanced technologies and thoughtful design, they cater to a wide range of cutting needs, making them indispensable tools for anyone serious about their work in forestry, landscaping, or yard maintenance.
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