OT, Stihl FS80 3000 RPMs to High

[Trigger-Time]

Got out FS80 weed eater today, checked rpms, it's 3000 to fast
and it don't look to be adjustable.
Could a fuel passage in the carb be blocked some making it
run lean?
It started in 3 pulls after setting a year and runs
good, book says 7500, it's running 10500.....Maybe it's always
run this speed, it's 6 years old never been back to the dealer.
Just got a tach late last year.

Sorry for OT......best place to go that I know of....for do it yourself
Thanks

 

[THALL10326]

Got out FS80 weed eater today, checked rpms, it's 3000 to fast
and it don't look to be adjustable.
Could a fuel passage in the carb be blocked some making it
run lean?
It started in 3 pulls after setting a year and runs
good, book says 7500, it's running 10500.....Maybe it's always
run this speed, it's 6 years old never been back to the dealer.
Just got a tach late last year.

Got it loaded with string in the head and sticking out like it should be. FS80's with a empty head will go up to 10 grand...

 

[Trigger-Time]

Got it loaded with string in the head and sticking out like it should be. FS80's with a empty head will go up to 10 grand...

Yes, I checked...........I even put some 40:1 mix in it, droped to 9800

 

[Lakeside53]

First, make sure you have the correct length string on it... BTW.. 10,500 seems o.k. to me...


The books I have say 9700 to 11,300....


If you are worried, reset your carb to std setting and try it then. Yes, you could have a partially blocked fuel filter or carb inlet screen,

 

[Trigger-Time]

First, make sure you have the correct length string on it... BTW.. 10,500 seems o.k. to me...


If you are worried, reset your carb to std setting and try it then. Yes, you could have a partially blocked fuel filter or carb inlet screen,

I will check some more.........it just seems like that it four stroked
more than it dose now.........very light four stroking now.

 

[Trigger-Time]

The books I have say 9700 to 11,300....
,

OK, my owners manual says 7500......9700 to 11300...I'm good to go!

 

[Lakeside53]

Trigger, you missed my edit..

9700 to 11300

4 stroking...??? Be careful... it's under full power with the right length string so you often won't hear any such sounds... it's like tuning a blower... take it to peak from the rich side, then back off a couple of hundred rpm..

 

[Trigger-Time]

Trigger, you missed my edit..

9700 to 11300

4 stroking...??? Be careful... it's under full power with the right length string so you often won't hear any such sounds... it's like tuning a blower... take it to peak from the rich side, then back off a couple of hundred rpm..

How do you adjust the High Side?

I see the L screw........is it the cam thing on the throttle cable?

 

[Lakeside53]

Huh? Didn't I just say how?? That assumes you have a carb with a H screw, if not, you are screwed

 

[Trigger-Time]

Huh? Didn't I just say how?? That assumes you have a carb with a H screw, if not, you are screwed

Screwed.............no H screw!........Its now ready for the Wife

Thanks, Gary

 

[Lakeside53]

You can just drop on a walbro WT264... about $30, but heck, it's just a crappy little weedeater. Next you'll be opening up the muffler :yoyo:

 

[Trigger-Time]

You can just drop on a walbro WT264... about $30, but heck, it's just a crappy little weedeater. Next you'll be opening up the muffler :yoyo:

The wife uses the weed eater head........I use the saw blade
on it.........SAW blade hey this is not OT as I thought!

 

[Trigger-Time]

Next you'll be opening up the muffler :yoyo:

No but the screen may come out.......bought Wife a MM55 yesterday
she likes it!

 

[blis]

The wife uses the weed eater head........I use the saw blade
on it.........SAW blade hey this is not OT as I thought!

I take it you like to play with your life?

 

[Trigger-Time]

I take it you like to play with your life?

Do you mean the Wife or the Blade.............It is a bike handle model
It will cut 1.5" dia brush in a blink of the eye!

 

[jhellwig]

Those are just fun to play with. Tank of fuel gives lots of fun destroying pesky pokey plants.