Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Chainsaws not listed - Gas OPE => Topic started by: Cut4fun . on December 06, 2017, 06:10:35 pm

Title: Stihl FS-80
Post by: Cut4fun . on December 06, 2017, 06:10:35 pm
Got this stihl fs80 bicycle handle bar trimmer when I was down south. Needs carb and on order.
Also came with a new metal brush cutting blade.  Dont know if I will keep it yet or not.



Title: Re: Stihl FS-80
Post by: 3000 FPS on December 06, 2017, 10:22:53 pm
I believe the FS80 used a solid steel shaft instead of the flexible spring steel type shaft.    It also has a gear head on it to get the angle instead of the bent shaft trimmers.     The gear head should be packed with grease and that is something that you can check.   

If I remember correctly the trimmer head is a left hand thread and there is a place that you can stick a allen wrench into it that will keep the head from rotating so that you can unscrew it.  They can get pretty tight.   
Title: Re: Stihl FS-80
Post by: concretegrazer on December 07, 2017, 04:17:53 pm
Fs-75 & 80 are cable drive. Fs-85 is shaft driven. Same powerhead on all 3. The 75 is bent shaft.
Title: Re: Stihl FS-80
Post by: Cut4fun . on December 07, 2017, 04:18:57 pm
Nice info Thanks.
Title: Re: Stihl FS-80
Post by: pete on December 14, 2017, 06:25:36 am
the fs 80s I have are straight steel shaft  run steel blades and cut small saplings no problem but they are 35 years old and cycle handlebar style  and thats in Oz
Title: Re: Stihl FS-80
Post by: Cut4fun . on December 14, 2017, 08:48:26 am
The stihl dealer techs told me to check. Because they have seen the 80 with cable and solid. 
Just got the carb in but in no hurry. 17 out and snowing.
Title: Re: Stihl FS-80
Post by: Cut4fun . on December 21, 2017, 01:46:47 pm
Old carb just had a L and looked like a brass gov on side. I ordered a new aftermarket with H and L.  New echo lines and running like a new one. 
Title: Re: Stihl FS-80
Post by: Cut4fun . on April 09, 2018, 06:53:24 am
Was putting the metal brush cutting blade on this yesterday and ended up having to order the blade adapter kit.  $10

The stihl blade that came with this uses 7/32 round file to sharpen.   



Title: Re: Stihl FS-80
Post by: Cut4fun . on April 09, 2018, 07:27:20 pm
Saving // JM =  4117 710 8200 is the stihl part number, they call it a limit stop. It is a solid aluminum guard.
Title: Re: Stihl FS-80
Post by: Cut4fun . on April 13, 2018, 07:10:46 am
Parts came in yesterday and installed the blade. Holy heck I dont lived without one of these so long.
Cutting briars and small trumpet vine was like cutting butter with a laser.
Title: Re: Stihl FS-80
Post by: Cut4fun . on October 19, 2018, 10:08:00 am
Been using this with brush cutter blade all year off /on with great results.   Yesterday  it let me down. Wife wanted me to go around and cut the zinnias down that the frost killed. 
Well go figure it decided not starting today. Could only get it to pop if I squirt mix through carb.  So back on the bench it goes after I am not pizzed off at it. 
Looks like I am going to buy a brushcutter for the new echo to keep on hand too.
Title: Re: Stihl FS-80
Post by: 3000 FPS on October 19, 2018, 10:52:28 pm
Been using this with brush cutter blade all year off /on with great results.   Yesterday  it let me down. Wife wanted me to go around and cut the zinnias down that the frost killed. 
Well go figure it decided not starting today. Could only get it to pop if I squirt mix through carb.  So back on the bench it goes after I am not pizzed off at it. 
Looks like I am going to buy a brushcutter for the new echo to keep on hand too.

Does it have a Zama carb.    I have seen a lot of those with issues and sometimes I cannot find carb kits for certain models of the Zama carbs used on Stihl string trimmers.   
Title: Re: Stihl FS-80
Post by: Cut4fun . on October 20, 2018, 08:32:04 am
Been using this with brush cutter blade all year off /on with great results.   Yesterday  it let me down. Wife wanted me to go around and cut the zinnias down that the frost killed. 
Well go figure it decided not starting today. Could only get it to pop if I squirt mix through carb.  So back on the bench it goes after I am not pizzed off at it. 
Looks like I am going to buy a brushcutter for the new echo to keep on hand too.

Does it have a Zama carb.    I have seen a lot of those with issues and sometimes I cannot find carb kits for certain models of the Zama carbs used on Stihl string trimmers.   

Old oem one wasnt rebuildable in 2017.  I am guessing a stiff diaphragm or I will just throw another carb on it.

Found in thread were I put a aftermarket on it. =

Old carb just had a L and looked like a brass gov on side. I ordered a new aftermarket with H and L.  New echo lines and running like a new one. 
Title: Re: Stihl FS-80
Post by: Cut4fun . on October 21, 2018, 08:33:28 am
Was going to remove carb yesterday. But noticed the fuel line had split right where it goes up on inlet.  So should find out soon if easy fix that was just very untimely.

Went ahead and ordered me a brushcutter attachment for the echo PAS 280.  Just to have a back up plan for down the road.
Title: Re: Stihl FS-80
Post by: Cut4fun . on October 21, 2018, 12:21:07 pm
Thats all it was. = split fuel line where it went on inlet. afm carb runs like new again. 

Did notice the plastic choke deal stihl uses on these  hangs up and dont close all the way at times too.