Jonsered Chainsaw Fuel Mixture Instructions - Essential Guide
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FUEL HANDLING

Fuelmix

IMPORTANT! The chain saw is equipped with a two-stroke engine and must always been run using a mixture of gasoline and two-stroke engine oil. It is important to accurately measure the amount of oil to be mixed to ensure that the correct mixture is obtained. When mixing small amounts of fuel, even small inaccuracies can drastically affect the ratio of the mixture.

!Always provide for good ventilation when handling fuel.

Gasoline

•This engine is certified to operate on unleaded gasoline.

• Use good quality unleaded gasoline.

• The lowest recommended octane rating is 87. If you run the engine on lower octane rating than 87 so- called “knocking“ can occur. This leads to an increased engine temperature, which can result in a serious engine breakdown.

•When working at continuous high revs a higher octane rating is recommended.

Two-stroke oil

•For the best results use JONSERED two-stroke oil, which is especially developed for chain saws. Mixing ratio 1:50 (2%).

•Never use two-stroke oil intended for water cooled outboard engines, so-called, outboard oil.

•Never use oil intended for four-stroke engines.

Gasoline

Oil

2%(1:50)

Lit.

Lit.

50,10

10

0,20

15

0,30

20

0,40

US

US

gallon

fl. oz.

12 1/2

2 1/2

6 1/2

512 7/8

Mixing

•Always mix the gasoline and oil in a clean container intended for fuel.

•Always start by filling half the amount of the gasoline to be used. Then add the entire amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of gasoline.

•Mix (shake) the fuel mixture thoroughly before filling the saw’s fuel tank.

•Do not mix more than max. one month’s supply of fuel.

•If the saw is not used for some time the fuel tank should be emptied and cleaned.

•This engine is certified to operate on unleaded gasoline.

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Contents EPA KEY to Symbols SymbolsContents EPASafety Instructions Personal Protective EquipmentChain brake and front hand guard 3a StartingRight hand guard Throttle lockChain catcher Muffler Stop switchVibration damping system Checking the inertia brake release Checking brake band wearChecking the front hand guard Checking the brake triggerThrottle lock Cutting Equipment 5 basic rulesSaw chain Cutting equipment designed to minimise kickbackBar Some terms that describe the bar and chainSharpening cutting teeth Sharpening your chain and adjusting raker clearanceGeneral information on sharpening cutting teeth Risk of kickback is increased with a badly sharpened chainTensioning the chain General advice on setting raker clearanceSetting the raker clearance Filling with chain oil Lubricating cutting equipmentChain oil Never use waste oilChecking wear on cutting equipment Needle bearing maintenanceChecking chain lubrication Lubricating the bar tip sprocketHOW to Avoid Kickback What is kickback?Never use the saw one- handed General rulesDo not let go of the handles Min m 10 ftBasic safety rules General Working InstructionsTerms Basic cutting techniqueGeneral CuttingLimbing Tree felling techniqueSafe distance Felling directionClearing the trunk and preparing your retreat FellingCutting the trunk into logs General adviceFreeing a tree that has fallen badly = high accident risk Freeing a Trapped treeWhat is WHAT? What is what?Assembly Mounting guide bar and chainGasoline Fuel HandlingFuelmix Two-stroke oilMin 3 m FuellingChain oil 10ftStart Start and StopStart and stop StopMaintenance CarburetorChanging a broken or worn starter cord Starter device assemblyStarter device Tensioning the recoil springMuffler Needle bearing maintenanceAir filter Spark plugWinter use Adjustment of the oil pump Centrifugal cleaningCooling system Long-term storage Weekly maintenance Daily maintenanceMonthly maintenance Bar and chain combinations Technical DataRecommended original and replacement Emission Control Warranty Statement Your Warranty Rights Obligations108 88 2002W49

CS 2145, CS 2150, CS 2141 specifications

The Jonsered CS 2141, CS 2150, and CS 2145 chainsaws are renowned for their powerful performance and advanced technologies, making them the top choice for both professional loggers and enthusiastic DIYers. Each model shares a commitment to delivering reliability, efficiency, and precision in cutting, while still prioritizing user comfort and safety.

The CS 2141 model is designed with a robust 40.9 cc engine that provides strong power output while remaining lightweight, making it easy to maneuver. This chainsaw features a 15-inch guide bar, ideal for tackling small to medium-sized trees and clearing brush. The innovative fuel system ensures longer running times, reducing the frequency of refueling interruptions. A hallmark of this model is its Easy Start system, eliminating the hassle of hard starts to get you cutting quickly.

Moving up, the Jonsered CS 2150 boasts a slightly larger engine capacity of 50.2 cc, which translates to enhanced power, particularly useful for more demanding cutting tasks. This model is equipped with a 20-inch guide bar, allowing for efficient felling and limbing of larger trees. Its design incorporates the Air Injection air filtration system that separates debris from the air, extending the life of the air filter and reducing maintenance needs. The lightweight design coupled with anti-vibration technology makes operating this model comfortable, even during extended use.

The CS 2145 model is a versatile chainsaw that finds a perfect balance between power and weight. With a 45.7 cc engine, it provides excellent cutting performance for a range of applications. It features a 16-inch guide bar, making it adaptable for various tasks from pruning to more extensive logging work. Like its counterparts, the CS 2145 includes the Smart Start technology for effortless starting and an automatic oil pump to ensure a steady flow of lubrication to the chain, increasing the overall lifespan of the saw.

All three models utilize Jonsered's revolutionary X-Torq engine technology, which significantly reduces fuel consumption and emissions, underlining their commitment to environmentally friendly operation. Furthermore, each chainsaw is ergonomically designed, with focus on comfortable grip and controls that allow users to work with precision and ease.

In summary, the Jonsered CS 2141, CS 2150, and CS 2145 chainsaws combine cutting-edge technology with practical features that meet the needs of users in various cutting conditions. With powerful engines, advanced filtration systems, and user-friendly designs, these models set a high standard in the chainsaw market.
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