Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Chainsaws not listed - Gas OPE => Topic started by: JohnG28 on March 23, 2015, 11:22:12 am

Title: Stihl fs 80
Post by: JohnG28 on March 23, 2015, 11:22:12 am
Anyone have any info on these? Google search doesn't turn up all that much in depth information. There's one for sale locally for a decent price  (I think) of $150. It seems as though they were made for a long time, 80s and 90s, but not sure if as recent as last 10 years or so? Anything to watch for on these? Solid shaft or no? Any way to tell date of manufacturing by s/n? Appreciate any info.
Title: Re: Stihl fs 80
Post by: Cut4fun on March 23, 2015, 01:43:30 pm
I know nothing, but quick search shows STIHL 25.4 cc , flex cable drive.

http://www.backyardboss.com/mfg_Stihl/FS80.aspx
Title: Re: Stihl fs 80
Post by: Cut4fun on March 23, 2015, 01:44:27 pm
says the fs85 had a soild shaft in above read.  The fs80 flex cable type shaft.
Title: Re: Stihl fs 80
Post by: Eccentric on March 23, 2015, 10:29:50 pm
There were two different FS80 Stihls.  The more recent one (that is actually a Stihl design) is shown in that Backyardboss link.

The early FS80 was a Shindaiwa design.  Sold by Stihl in the early-mid 1980's.  I have a 1983-1984 or so production FS80AVRE that my Grandpa bought new.  Big heavy Shindaiwa design.  Has a TK slide valve carb.  Mine doesn't owe anyone a damn thing, having given 20 years of hard service before being retired for the most part.  It still runs, but is tired.  I'll post a few pics later tonight if can find them...

Title: Re: Stihl fs 80
Post by: RoyM on March 23, 2015, 11:52:06 pm
I am keeping my eyes open for one or an FS 85, they are real workhorses and I am partial to old school 2 strokes. Parts are readily available. $150 seems a fair price for a good one but I would not pay more than that. We are moving to an acreage in a month and my little Echo curved shaft just isn't going to do the job.
Title: Re: Stihl fs 80
Post by: Eccentric on March 24, 2015, 01:29:51 am
There are still lots of parts floating around.  I JUST missed buying an NOS P/C set for peanuts a few years ago.  An ebay oops.......
Title: Re: Stihl fs 80
Post by: pete on March 24, 2015, 06:14:22 am
I ran an fs80 in the early 80s for my lawn mowing round couldn't kill it still a runner today, only problem I have had was trying to get  a new in tank fuel line took me a bout 12 months to find one. It sits for months at a time without being used But I pull it out for long grass jobs with a steel blade. Scored another recently should be a runner as it fires on carb prime. That one was a freebie
Title: Re: Stihl fs 80
Post by: JohnG28 on March 24, 2015, 10:54:44 am
Thanks for the input guys. That site C4F posted was the best I had found also, missed the details on flex shaft in there though. Sounds like positive feedback so that's a good deal. From reading I found the old ones with slide carb have all the carb screws in a vertical row, is this correct? Going to shoot over to look at it later today or tomorrow I think. Don't have a lot to use it on but then I could leave the one I have now at the camp up north. Thanks again!
Title: Re: Stihl fs 80
Post by: 660magnum on March 24, 2015, 11:18:09 am
I do not have a FS-80.

I do have four FS55R weed whackers. One was originally a standard FS-55 and two were always FS-55R's and one was originally a FS-45 curved shaft weed whacker. All four are the 27.2cc #4140 two stroke power head.

Two of these have Straight shafts, gear heads and guards from FS-90 four strokes and two have their original FS-55R straight flex shafts, gear heads, and guards. All four look like FS-55R's

The FS-90 solid steel shaft units have a heavier feel than the flex shaft versions. This is partially due to the fact that the solid steel shaft FS-90 is 6" longer than the FS-55 straight flex shaft. The flex shaft itself weighs less than the solid steel shaft for the flex wound wire shaft is hollow. Operationally for me one works as well as the other and I have never had any trouble with the flex type shafts.
Title: Re: Stihl fs 80
Post by: Eccentric on March 24, 2015, 03:25:52 pm
(http://i171.photobucket.com/albums/u318/Eccentric_photo/weedwackers%20and%20brushcutters/IMG_20140626_140809289_zpsqqnkh6sd.jpg)
(http://i171.photobucket.com/albums/u318/Eccentric_photo/weedwackers%20and%20brushcutters/IMG_20140626_140820666_zpsmupyzlaa.jpg)

Here's my old style FS80AVRE.  Absolutely no relation to the later FS80.  My machine has a solid drive shaft.
Title: Re: Stihl fs 80
Post by: JohnG28 on March 24, 2015, 08:53:36 pm
That's what I was thinking was the older model, I have seen a few of like that. Going to run and check it out tomorrow afternoon. Guy said it's in good shape, shall see. Appreciate the info guys.  8)
Title: Re: Stihl fs 80
Post by: Eccentric on March 24, 2015, 08:59:57 pm
They're good reliable machines.  Bit heavy.  Decent power.  I have the operators manual for these and can give you basic info from it if needed.  The initial carb settings are weird with that TK carb....
Title: Re: Stihl fs 80
Post by: JohnG28 on March 27, 2015, 07:28:57 pm
Well turned out to be a bust. Unit was rode hard and put away wet. Guy said it was just a little cold blooded, then proceed to pull on it about 25 times without it starting. I suggested may need a carb rebuild, but he said the was just done.  So no go, but I appreciate all the info just the same!  :)
Title: Re: Stihl fs 80
Post by: Eccentric on March 27, 2015, 10:51:13 pm
No problem.  There's still quite a few of these around.  Don't overlook the Shindaiwa branded versions either.  Good machines.  I JUST missed out on a BP45 (a powerful Shindaiwa brushcutter) on my local CL a while ago.  Basically sold while I was driving to go look at it.....
Title: Re: Stihl fs 80
Post by: pete on March 28, 2015, 06:43:16 am
Apart from the problem I mentioned with getting the fuel line my biggest PITA has been the fuel caps splitting around the top where the thread starts
Title: Re: Stihl fs 80
Post by: Eccentric on March 28, 2015, 12:38:46 pm
Apart from the problem I mentioned with getting the fuel line my biggest PITA has been the fuel caps splitting around the top where the thread starts

I had a cap split too.  My local Stihl dealer found a suitable replacement.  IIRC it was a cap for an older blower.

(http://i171.photobucket.com/albums/u318/Eccentric_photo/weedwackers%20and%20brushcutters/IMG_20140626_140754231_zpsfgggxncd.jpg)

Best pic I have of it....
Title: Re: Stihl fs 80
Post by: 660magnum on March 28, 2015, 12:56:30 pm
I think I might still have most of one of those that came along for the ride amongst several other misc things? The whacker outer shaft had a kink and the carburetor is missing?

IIRC someone told me that they were made in Japan for Stihl?  Never heard anything bad about them.
Title: Re: Stihl fs 80
Post by: Eccentric on March 28, 2015, 03:48:34 pm
I think I might still have most of one of those that came along for the ride amongst several other misc things? The whacker outer shaft had a kink and the carburetor is missing?

IIRC someone told me that they were made in Japan for Stihl?  Never heard anything bad about them.

Yes they were made by Shindaiwa.  Quality machines.   Other than being a bit heavy they're still good usable models.
Title: Re: Stihl fs 80
Post by: JohnG28 on March 28, 2015, 10:00:25 pm
I usually have an eye on the local CL for this and that, sure something else will pop up eventually. Don't really need a trimmer but I don't love the one I have and wouldn't mind replacing it with a quality unit. Till then I'm still in business though.  8)
Title: Re: Stihl fs 80 fuel cap (1980's Shindaiwa?)
Post by: Abbadon on April 23, 2019, 06:03:20 am
Apart from the problem I mentioned with getting the fuel line my biggest PITA has been the fuel caps splitting around the top where the thread starts

Sorry to drag this topic back to the front, and as my first post, but I am hoping someone might be able to guide me to finding a suitable fuel cap - as mentioned here , it seems hard to know what cap to get - anyone shed any light on the blower mentioned later in the thread which someone found a cap from, that fitted their oldschool FS80AVR? Any light that can be shed on a Shindaiwa cap that will fit would be most appreciated!

Andy

Title: Re: Stihl fs 80
Post by: pete on April 24, 2019, 05:50:14 am
Check ebay I found a new one for mine out of china most of those stihl brushcutter caps interchange
Title: Re: Stihl fs 80
Post by: Abbadon on April 25, 2019, 01:34:03 am
Any guidance would be much appreciated, as ive tried a couple of stihl caps from the east already, and neither fit :(

I saw some Shindaiwa caps on ebay, but the seller said they wouldnt fit - but im not sure if he just doesnt know and doesnt want to stick his neck out for me.

Andy
Title: Re: Stihl fs 80
Post by: pete on April 25, 2019, 06:33:14 am
I will check it out tomorrow for you will see what fits what got 4 different stihl brushcutters in the shed
Title: Re: Stihl fs 80
Post by: minh2019huy on May 30, 2019, 10:38:02 pm
i have same problem. I find more information
Title: Re: Stihl fs 80
Post by: Abbadon on June 01, 2019, 08:52:01 am
Any luck anyone?
Title: Re: Stihl fs 80
Post by: upup_and_away on November 01, 2019, 02:17:04 pm
Any luck anyone?

Don't know if anyone is still looking but someone on youtube shows that the current echo gas cap fits the old fs80.
Title: Re: Stihl fs 80
Post by: president on November 01, 2019, 03:09:34 pm
I have a fs 96,stihl made by shindiawa.Its a great machine,but the carb
is a pain ,even post carb kit .Someone ? mentioned converting a walbro
for it.I would be interested to hear how .
Title: Re: Stihl fs 80
Post by: DNX800 on November 04, 2019, 06:49:51 am
There were 2 Walbro carburetors used on the FS 96. The WT-38B and later the WT-189B. But both are NLA and also the air filter and filter housing parts. Maybe you are able to find good used parts.