The Green Industry's Resource Center

Old 09-08-2000, 10:25 PM
Jerrys Lawn Service Jerrys Lawn Service is offline
LawnSite Member
Join Date: Jun 2000
Location: Baltimore Maryland
Posts: 155
I've been having some trouble with my Stihl FS 80 trimmer
the muffler keeps clogging up with oil residue I am using
the correct mix 50-1, but it still is bogging down and whats
even more crazy is the hotter the temp is outside the worse
it becomes! I've taken it to my local dealer and was told
that I wasn't running it hard enough, he said wide open all
the time, I told him that this wasn't possible all the time
because of people, cars, houses, WINDOWS! What do you guys think? I talked to another landscaper and he said he's
having the same problem.

Good Luck to all
Reply With Quote
Old 09-08-2000, 10:27 PM
bob's Avatar
bob bob is offline
LawnSite Platinum Member
Join Date: Dec 1999
Location: DE
Posts: 4,256
Did you take the spark arrester screen off?

If you choked a Smurf, what color would it turn?

I'd give my right hand , if I could be ambidextrous!
Reply With Quote
Old 09-08-2000, 10:32 PM
LawnSite Senior Member
Join Date: Aug 2000
Location: Columbus Ga
Posts: 519
Question are you using the spark arsetor?if so get rid of it unless are are in a fire hazard area.if not i probally would look at the carb that were the mix enters the engine,
it may be nasty inside allowing more fuel the need or adjusted for,if thats it just clean it and rebuld it.This would probally explain the lack of rpms these are my thoughts anyway.
Reply With Quote
Old 09-08-2000, 10:38 PM
LoneStarLawn LoneStarLawn is offline
LawnSite Bronze Member
Join Date: Feb 2000
Location: San Antonio, TX
Posts: 1,415
Ditto !!!

Spark arrestor!!! Take it off...
Reply With Quote
Old 09-08-2000, 10:40 PM
Jerrys Lawn Service Jerrys Lawn Service is offline
LawnSite Member
Join Date: Jun 2000
Location: Baltimore Maryland
Posts: 155
Spark Arester

Spark Arester is already gone and problem didn't go away,
we did punch some holes in the ports of the muffler with a screwdriver, this did help somewhat.
Reply With Quote
Old 09-08-2000, 10:44 PM
Eric ELM Eric ELM is offline
Husband, Father, Friend, Angel
Join Date: Dec 1999
Location: Chicago, IL USA
Posts: 4,831
If it's not the spark arrester, it's carbon build up on the exhaust port. Take the muffler off and see if carbon has built up around the exhaust port, if so, clean it out and it will run full RPM's again, like when new. I clean the exhaust port opening each year on the string trimmers. You won't believe the difference. The Back Pack Blowers normally don't have this problem, since they are usually running wide open most of the time.
<img src="" border="0" alt="ELMLawnsite">
^One of the lawns we mow
Reply With Quote
Old 09-08-2000, 10:51 PM
bridges bridges is offline
LawnSite Member
Join Date: Apr 2000
Location: RI
Posts: 196
I just bought the fs 80 last week and no promblems eith it yet.

Hey eric thanks for the info. i had never done that to my echo's.

Reply With Quote
Old 09-09-2000, 09:40 AM
MOW ED's Avatar
MOW ED MOW ED is offline
LawnSite Fanatic
Join Date: Jan 2000
Location: N.E. Wisconsin
Posts: 5,027
Follow Stones advice as well as take the screen out. That heave petroleum based 2-cycle gums everything up and smells bad. You will soon change all of your 2 cycle to synthetic.
I did years ago and havent had a problem.
I even use it in the Lawnboy. The only problem is that now I get bit by mosquitos because I am not mowing in the blue cloud.
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Layout Style:

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Grand View Media
All times are GMT -4. The time now is 10:16 PM.

Page generated in 0.08864 seconds with 10 queries