Repair instructions

Faults and causes

Score marks on the piston (A)

1. Incorrect carburettor setting. Too high over- speed.

2. Too low octane fuel.

3. Too low or incorrect oil in the fuel.

Carbon build-up (B)

1. Incorrect carburettor setting. Too low over- speed.

2. Too much or incorrect oil in the fuel.

Piston ring breakage

1. Excessive engine speed.

2. Piston ring worn out.

3. Oversized piston ring groove. (See figure 59)

7.23 Piston and cylinder – refitting

1

Lubricate the little end bearing with two-stroke oil and insert it in the connecting rod (see figure 60).

2

Fit the piston with the arrow pointing towards the exhaust port. Push the gudgeon pin in and fit the circlips. NOTE! Use new wire fuses (see figure 60).

3

Fit the intake manifold on the cylinder, with insula- ting plate (4 screws).

4

Lubricate the piston ring and piston with two-stroke oil.

5

Fit new cylinder base gaskets. Lower the cylinder over the piston carefully.

6

Fit the cylinder bolts, tightening them in diagonal pairs to a torque of 13–15 Nm.

NOTE!

It is very important that there are no leaks in the inlet system, otherwise the engine may seize.

AB

Fig 59

Fig 60

Fig 61

English – 47

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Jonsered CS 2240 manual Piston and cylinder refitting, Faults and causes Score marks on the piston a, Carbon build-up B
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CS 2240 specifications

The Jonsered CS 2240 is a powerful and versatile chainsaw designed for homeowners, landscapers, and property maintenance professionals. It stands out in the market due to its unique combination of performance-oriented technology, ergonomic design, and ease of use.

One of the main features of the Jonsered CS 2240 is its robust engine. With a 40.9cc X-Torq® engine, this chainsaw is designed to provide efficient power and performance while minimizing fuel consumption and emissions. The X-Torq® engine technology not only enhances the chainsaw's acceleration and torque but also contributes to better fuel efficiency, making it an environmentally friendly option for users.

The CS 2240 is equipped with a 16-inch bar, which strikes a perfect balance for various cutting tasks, whether it's felling small trees, trimming branches, or performing general maintenance. This length also allows for greater maneuverability in tight spaces, making it an ideal choice for homeowners and professional users alike.

A notable aspect of the Jonsered CS 2240 is its innovative starting system. The Quick Release Air Filter ensures that the air filter can be easily accessed for maintenance, promoting optimal engine performance. Coupled with the Air Injection system, which filters out larger debris before it enters the engine, this chainsaw maintains a longer lifespan and reduces the frequency of required maintenance.

Safety is paramount in chainsaw design, and Jonsered does not compromise on that front. The CS 2240 features a chain brake, which halts the chain movement in the event of kickback. Additionally, the front handguard provides an extra layer of protection, ensuring that users can operate the saw with confidence.

The ergonomic design of the CS 2240 incorporates a comfortable handle that reduces vibrations, allowing for extended use without excessive fatigue. Weighing approximately 10.8 lbs, it strikes the right balance between power and portability.

In summary, the Jonsered CS 2240 is an excellent choice for those seeking a reliable, efficient, and user-friendly chainsaw. Its advanced engine technology, balanced bar length, safety features, and ergonomic design make it a standout in its class, ideal for tackling a variety of cutting tasks with ease and efficiency. Whether you are a casual user or a professional, the CS 2240 is well-equipped to meet diverse cutting needs while ensuring safety and comfort.
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