Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: Smgchandler on December 25, 2017, 12:02:10 pm

Title: Suggestions for 394xp rebuild
Post by: Smgchandler on December 25, 2017, 12:02:10 pm
I have a 394xp that was run without oil in gas.  I have no money in it and i think everything is there except a bar and chain. I have not removed cylinder to take a look so itís possible i may be able to re ring and clean up cylinder because the saw was almost new when this happened. Not sure how old the saw is but itís been under a bench for several years.  My question is since i canít find cylinder unless i go with 395 and the mod then what are my options.  Gluing the port onto top of carb just doesnít appeal to me especially on a chainsaw.   I would be perfectly happy with stock saw.  I cut wood for firewood only but would really like to get it going again.  Iíve read it is a beast   I would probably replace crankshaft seals fuel lines and anything else you want to suggest.  I appreciate any information on quality parts and would certainly be interested in any parts for sale that you think i may need.  Thanks
Title: Re: Suggestions for 394xp rebuild
Post by: Cut4fun . on December 25, 2017, 12:18:53 pm
IMO show pics and see if you can save the cylinder etc.
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 26, 2017, 07:02:26 pm
The saw is froze. Can't pull rope at all and with muffler off i can see side of piston has a scar on it.  How hard will it be to get the jug off ?  Any suggestions.    Saw cosmetically looks great    From experience what do you think cylinder will look like   I don't have time this evening to play with but maybe in a few days
Title: Re: Suggestions for 394xp rebuild
Post by: mdavlee . on December 27, 2017, 10:01:13 am
Pour atf into plug hole. Warm it up good and let it seep. 2 days if that and it should break the rings free. If that doesn't work then you might have to pump the top end full of grease by making a fitting on the spark plug.
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 27, 2017, 05:36:20 pm
Mdavlee that worked.  ATF Didnít take 2 days 😍.   Pulled this evening and itís loose.  I bet it doesnít have any compression but at least i can get jug off now.   Tomorrow eve i will see if i can get it off and post some pics of inside cylinder.   Iím not sure what is missing but seems whatever the air filter sits in and goes onto intake is missing.  Maybe some type of tray that sits on the round intake tube. Anybody know what this piece looks like or what itís called and where it can be had ?   Thanks 
Title: Re: Suggestions for 394xp rebuild
Post by: mdavlee . on December 27, 2017, 05:41:01 pm
ATF is magic stuff to break stuff loose
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 28, 2017, 03:29:29 pm
I will post a couple more if i can get closer pics.   I would like to know what the black spacer plastic piece is in sitting in orange pic   Itís brittle and needs replacing    What should i use or how should i begin to clean inside of cylinder   I have a cylinder hone for drill but that may be bad idea if what i feel is aluminum
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 28, 2017, 03:32:19 pm
More pics of cylinder
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 28, 2017, 03:46:28 pm
Is fugly a word or have some of you fellas seen worse ?   Iím going to remove piston from rod.  With new piston does it matter which way you turn it.  Is there an arrow for front or anything ?
Title: Re: Suggestions for 394xp rebuild
Post by: mdavlee . on December 28, 2017, 04:16:51 pm
Arrow towards exhaust and ring ends to intake
Title: Re: Suggestions for 394xp rebuild
Post by: jmester on December 28, 2017, 04:29:58 pm
I would wash out the bottom end with mixed gas to clean any debris that may have fallen in there when you took the cylinder off. http://service.webec.husqvarna.net/documents/HUSI/HUSI1998_USen/HUSI1998_USen_I9801045_.pdf
The above link is for a parts list it should help you to find the correct piece you are looking for in your picture above.
https://m.youtube.com/watch?v=cksVNkI4zps
This link is to a YouTube video from a member here that explains how to remove aluminum transfer from the cylinder. It works really well. It is the method that I use and many members here use. Hope it helps.
Title: Re: Suggestions for 394xp rebuild
Post by: Cut4fun . on December 28, 2017, 04:32:02 pm
That cylinder will clean up IMO. I just hand do it with emery cloth and elbow grease.  Then I finish up with 240 ball hone and cross hatch.

You can skip the last part and finish up with scotchbrite pad.
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 28, 2017, 06:56:20 pm
Fellas how can i tell what year it was manufactured   407006 is only number on tag
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 28, 2017, 07:44:42 pm
I havenít split case yet but i would really like to replace fuel line from tank.   Is it a part number or do you just use a good quality fuel line from somewhere  or is it a bad idea to split case if bearings and seals are ok   Can you think of any other things that would be good to replace
Title: Re: Suggestions for 394xp rebuild
Post by: jmester on December 28, 2017, 08:11:52 pm
Guess that depends on how much you are going to use it. If I was going to use it to make a living I would replace most or all of the rubber bits. If for occasional use I would overlook of some of it. Also depends on how much money you want to spend.

I always buy the fuel line from husky. But I am sure there is an aftermarket fuel line that will work.
Title: Re: Suggestions for 394xp rebuild
Post by: jmester on December 28, 2017, 08:13:09 pm
If the bearings and seals are ok then I don't see a need to split the case.
Title: Re: Suggestions for 394xp rebuild
Post by: Smgchandler on December 29, 2017, 03:50:31 am
Can you replace fuel line from tank without splitting case ? 
Title: Re: Suggestions for 394xp rebuild
Post by: Cut4fun . on December 29, 2017, 08:23:10 am
Can you replace fuel line from tank without splitting case ? 

Yes. Only reason for splitting case is bearings or crank IMO

husqvarna 394 IPL http://s30387.gridserver.com/partsDiagrams/Husqvarna%20394.pdf

Title: Re: Suggestions for 394xp rebuild
Post by: mdavlee . on December 29, 2017, 10:02:43 pm
Echo fuel line works great.
Title: Re: Suggestions for 394xp rebuild
Post by: farmboy on December 29, 2017, 11:00:00 pm
+1 I bought mine from Nate 3mmx5mm .
Shep
Title: Re: Suggestions for 394xp rebuild
Post by: Cut4fun . on December 30, 2017, 07:57:30 am
Yep I run the echo oem fuel line in everything I can. 3mmx5mm and 3mmx6mm. 

I cant navigate the new website to find it. But here is Nate's place for ordering https://www.performanceoutdoorequipment.com/
Title: Re: Suggestions for 394xp rebuild
Post by: pud30-30 on November 28, 2019, 12:01:11 am
spirit of salt will remove the piston transfer from the cylinder put a small amount on and let sit for 15 min then clean off replete till clean
PS it will bubble and go green while it removes the transfer