Repairing damaged threads

Repair instructions

A repair kit, 503 27 33-01, is available for repairing damaged threads.

First drill out the hole using:

6.1mm drill bit for magnesium crankcase

Then screw in the thread insert using a suitable bolt and spanner.

Thread insert

A damaged thread can be repaired using a thread insert. The slotted part of the thread insert is screwed in first, as this is the cutting part.

To repair a thread that was originally designed for a PL5 screw: first drill out with a 6.1 mm diameter drill bit, then screw in the thread insert using a suitable screw and spanner.

To repair a thread that was originally designed for a MT6 screw: first drill out with a 7.1 mm diameter drill bit, then screw in the thread insert using a suitable screw and spanner.

This type of thread insert is best suited for use in plastic and magnesium, but not for repairing threads in aluminium. In that case use a helicoil insert with metric screw.

New part no.	Description
503 27 39-01	PL5
503 27 40-01	MT6

Guide bar bolts – replacement

Drain the oil tank.

Knock through the old guide bar bolt so that it falls into the oil tank.

Remove the bolt from the oil tank.

Fasten a steel wire to the thread of the new bolt, feed the steel wire into the oil tank and out through the bolt hole in the crankcase.

Pull the steel wire until the bolt comes out through its hole.

Pull through the bolt with its nut. Place a spacer between the nut and crankcase.

Check that the square shoulder of the bolt is correctly seated in the recess in the crankcase.

Refill with chain oil.

English – 49

340, 345, 346XP,350, 351, 353 specifications

Husqvarna is renowned for its high-quality chainsaws, and the Husqvarna 340, 345, 346XP, 350, 351, and 353 models are no exceptions. These models have garnered a reputation among both professional and amateur users for their reliability, durability, and cutting performance.

The Husqvarna 340 is an entry-level model designed for homeowners and light-duty tasks. It features a 40cc engine that provides a good balance of power and weight, making it easy to handle during extended use. The 340 is equipped with low-vibration technology, significantly reducing operator fatigue and making it suitable for less experienced users.

The Husqvarna 345 is slightly more powerful than the 340, boasting a 45.7cc engine. This model is ideal for users who require a bit more power for medium-duty tasks. It incorporates the air injection system, which helps to separate larger debris before it reaches the air filter, prolonging the life of the filter and maintaining optimal performance.

Moving up the range, the Husqvarna 346XP is a powerful professional chainsaw tailored for demanding tasks. With a 50.2cc engine and the X-Torq engine technology, it provides high cutting performance while reducing fuel consumption and emissions. The 346XP features an adjustable oil pump that allows for precise lubrication, making it an excellent choice for commercial users.

The Husqvarna 350 shares similarities with the 346XP but is designed for users who need a well-rounded saw for various applications. Its 50.2cc engine delivers ample power, and the ergonomically designed handle provides comfort during prolonged use. The chainsaw's advanced starting system ensures easy ignition, even in challenging conditions.

The 351 is another versatile option, equipped with a 50cc engine, designed for both professional and home use. It emphasizes user comfort and ease of handling. The compact design combined with features such as an efficient air filtration system makes the 351 suitable for long hours of work.

Lastly, the Husqvarna 353 is a heavy-duty model that excels in performance and longevity. It has a 50cc engine and incorporates various safety features, including a chain brake and throttle lock, to ensure safe operation. The saw also utilizes the unique anti-vibration system, minimizing vibrations that can lead to user fatigue.

In summary, the Husqvarna 340, 345, 346XP, 350, 351, and 353 models each offer distinct features catering to a wide range of users. From homeowners tackling light tasks to professionals requiring rugged performance, these chainsaws showcase Husqvarna's commitment to quality, innovation, and user-centric design.