Comprehensive Repair Guide for Husqvarna 353G, 351G, and 346XPG Models

Repair instructions

Unscrew the two bolts from the right side of the rear hand grip. Remove the throttle lock and throttle handle, see “Throttle trigger”. Pull out the heater element with the leads still connected.

Troubleshooting carburettor heater (346XPG, 351G, 353G)

Operation

The carburettor temperature is controlled by an electronic thermostat to eliminate the risk of ice formation in the carburettor. The thermostat switches on/off at 12°C/54F. This means that the saw operator does not need to remember to switch the carburettor heater on or off.

•Troubleshooting Front handle heater

Remove the side cover from the handle. Discon- nect the leads at F and G (see diagram).

Clean the connectors. Turn the switch ”on”. Measure the resistance between F and G.

The reading should be 4±1 ohms. If not, discon- nect the lead at O and remove the switch. Measure the resistance between O and F. The reading should be 4±1 ohms. If the resistance is incorrect, replace the front handle.

Disconnect the lead at N and G and measure the resistance between these points. The reading should be no higher than 0.1 ohm. If it is too high, replace the lead.

Switch

Measure the resistance between N and O with the switch turned off. The reading should be 1 000 ohms or higher.

Repeat the measurement with the switch turned on. The reading should be no higher than 0.1 ohm. If it is too high, replace the switch.

Rear handle heater

Measure the resistance between F and Z. It should be 1 ± 0.5 ohm.

If not, replace the rear handle heater.

Generator

Measure the resistance between G and H. It should be between 0.3–1.3 ohm.

If not, replace the generator.

Carburettor heater

Disconnect the lead at X and clean the connectors. Measure the resistance between X and G.

The reading should be between 3–10 ohms. If not, disconnect the lead at Y and clean the connectors. Measure the resistance between X and Y, if the reading is not between 3–7 ohms – replace the carburettor heater.

		Z
		5
	N	5
	N
	G	F
	G	3
		3
		KV X

Y 11

English – 19

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.

Husqvarna In-Depth Troubleshooting and Repair Guide for Chainsaws

Models: 340, 345, 346XP,350, 351, 353