Hey. I became the owner of a used Husqvarna 445 saw. Unfortunately, the saw is ready to stand. The saw does not fire properly and does not work. After 20 puffs and a few jerks, it fires for a moment, jumps into high speed and goes out. In the button we pump the fuel you can see the air, but it...

There is no advice, you need to check everything in turn.

Put some fuel onto the piston, e.g. 1 cm 3, and try to start the engine without suction. If the engine starts, look for a fault, among others carburetor, shaft seals, damaged fuel pump hoses and also check the cylinder pressure. You can also view the condition of the piston, cylinder and rings, after removing the muffler, if you suspect that the engine chafing.

Hello I started working with a saw. I quickly found one frayed fuel line, unfortunately after the exchange virtually unchanged. The needle valve and the needle itself have been discolored. Pumping membrane quite bulged. What's more, the T adjustment screw is missing. Can it be adjusted / bought? I saw a piston under the carburetor connector and it looks good from this side.

You will find parts by number in the catalog or under the name Husqvarna 445. The membrane is in poor condition.

hello I have a question I have exchanged a magneto for a cheap replacement and works the other way after firing how is the reason

It turned out that there are 2 types of magnetos I have the torx type

Husqvarna 445 - Carburetor Issues, Power Supply, Troubleshooting & Cleaning Tips

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#1 16712928 21 Sep 2017 21:01

mariusz090 mariusz090

Level 13

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Post #1
16712928 21 Sep 2017 21:01

Hey.
I became the owner of a used Husqvarna 445 saw. Unfortunately, the saw is ready to stand.
The saw does not fire properly and does not work. After 20 puffs and a few jerks, it fires for a moment, jumps into high speed and goes out.
In the button we pump the fuel you can see the air, but it is not leaking. Can you somehow diagnose it?
How do you go about it first? Unscrew the carburetor for cleaning first?
Greetings.
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#2 16713126 21 Sep 2017 22:02

1 PAWEL 1 PAWEL

Level 42

» | Helpful post? (0)

Post #2
16713126 21 Sep 2017 22:02

There is no advice, you need to check everything in turn.
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#3 16713195 21 Sep 2017 22:25

Staszek49 Staszek49

Level 35

» | Helpful post? (+1)

Post #3
16713195 21 Sep 2017 22:25

Put some fuel onto the piston, e.g. 1 cm 3, and try to start the engine without suction. If the engine starts, look for a fault, among others carburetor, shaft seals, damaged fuel pump hoses and also check the cylinder pressure. You can also view the condition of the piston, cylinder and rings, after removing the muffler, if you suspect that the engine "chafing".
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#4 16730111 30 Sep 2017 20:47

mariusz090 mariusz090

Level 13

» | Topic author Helpful post? (+2)

Post #4
16730111 30 Sep 2017 20:47

Hello
I started working with a saw. I quickly found one frayed fuel line, unfortunately after the exchange virtually unchanged. The needle valve and the needle itself have been discolored.
Pumping membrane quite bulged. What's more, the T adjustment screw is missing. Can it be adjusted / bought?
I saw a piston under the carburetor connector and it looks good from this side.
#5 16730242 30 Sep 2017 21:56

1 PAWEL 1 PAWEL

Level 42

» | Helpful post? (0)

Post #5
16730242 30 Sep 2017 21:56

You will find parts by number in the catalog or under the name Husqvarna 445.
The membrane is in poor condition.
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#6 17336763 18 Jul 2018 19:50

Kamil890714 Kamil890714

Level 2

» | Helpful post? (+3)

Post #6
17336763 18 Jul 2018 19:50

hello I have a question I have exchanged a magneto for a cheap replacement and works the other way after firing how is the reason
#7 17340408 20 Jul 2018 17:29

Kamil890714 Kamil890714

Level 2

» | Helpful post? (+1)

Post #7
17340408 20 Jul 2018 17:29

It turned out that there are 2 types of magnetos I have the torx type
#8 17340617 20 Jul 2018 19:26

kamilo23 kamilo23

Level 22

» | Helpful post? (0)

Post #8
17340617 20 Jul 2018 19:26

Currently even 3.
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Topic summary

The discussion revolves around troubleshooting issues with a used Husqvarna 445 chainsaw that fails to start properly. The owner reports intermittent firing and high-speed shutdowns. Suggestions include checking various components sequentially, such as the carburetor, fuel lines, and cylinder pressure. A frayed fuel line was identified, and the condition of the needle valve and diaphragm was noted as poor. The owner also inquired about the missing T adjustment screw and the possibility of obtaining replacement parts. Additionally, there were mentions of magneto types affecting performance, indicating the need for compatible components.
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Husqvarna 445 - Carburetor Issues, Power Supply, Troubleshooting & Cleaning Tips

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