Author Topic: Husqvarna 394  (Read 7017 times)

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Offline jmester

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Re: husqvarna 394
« Reply #100 on: July 10, 2015, 02:50:58 pm »
Thanks cut. I looked him up and sent him a message. Guess I will have to wait and see.
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Offline jmester

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Re: 394
« Reply #101 on: July 10, 2015, 05:04:13 pm »
Fuel tank holds a vacuum. Ordered and new vent and filter plug.
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Offline Cut4fun .

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Re: husqvarna 394
« Reply #102 on: July 10, 2015, 05:39:48 pm »
Fuel tank holds a vacuum. Ordered and new vent and filter plug.

Always nice to figure it how why it was doing something like that.

Offline mdavlee .

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Re: husqvarna 394
« Reply #103 on: July 10, 2015, 06:49:18 pm »
Those tank vent setups can clog up and cause a lean problem. One of the 394s I got to rebuild that was the only problem it had and it scored the piston.

Offline jmester

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Re: husqvarna 394
« Reply #104 on: July 10, 2015, 08:31:49 pm »
A fuel tank vent has a lot to do with how a saw runs. Was going to try and modify something else to work. Tried some different Stihl vents that I have laying around but nothing seemed to work quite right. The only other thing I was thinking was to find a small grub screw like in the old style 025 tank vents and screw down in the plastic stem to see if that would work a little better than the way husky has them. Have the 025 grub screws and they are to small at the beginning of the stem and to large at the small end. But for what the vent cost from husky not sure it is worth the time to try and figure out.
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Offline 660magnum

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Re: husqvarna 394
« Reply #105 on: July 10, 2015, 10:32:10 pm »
You can double check your vent set up with your Mighty Vac tester or just draw on it with your mouth?
We should share what we know... someone may learn...
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Offline jmester

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Re: husqvarna 394
« Reply #106 on: July 11, 2015, 06:13:03 am »
I did mess with it a little more last nite. Had to drill the inner part of the stem to even get the grub screw started. Got it to thread in, it was to tight. It would hold vaccum. I feel that is as big as I could drill with out messing up the walls of the vent stem. Need to find a small dia coarse set screw and try that. I think it would work very well to find a smaller dia set screw as there would be less surface area touching the stem and allow air to pass more freely.
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Offline 660magnum

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Re: husqvarna 394
« Reply #107 on: July 11, 2015, 06:29:17 am »
The vent cannot hold a vacuum on the tank side or the engine will eventually starve for fuel.

I'm thinking that was the point of your post?
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Re: husqvarna 394
« Reply #108 on: July 11, 2015, 06:34:09 am »
Yes it was. Just trying to do some different things to see if I could get something to work. Seems there is a lot of problems with the vent system on these saws.
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Offline pete

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Re: husqvarna 394
« Reply #109 on: July 11, 2015, 08:09:21 am »
A fuel tank vent has a lot to do with how a saw runs. Was going to try and modify something else to work. Tried some different Stihl vents that I have laying around but nothing seemed to work quite right. The only other thing I was thinking was to find a small grub screw like in the old style 025 tank vents and screw down in the plastic stem to see if that would work a little better than the way husky has them. Have the 025 grub screws and they are to small at the beginning of the stem and to large at the small end. But for what the vent cost from husky not sure it is worth the time to try and figure out.

I was fixing a 009 and screwed the grub screw into the hose and it made a total seal  tried again by just pushing it in and it worked, must have been screwing it in cut a thread and fully sealed the line , just an idea

 

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