Stihl FS80 over-revving

[RichardT]

Put this back together after a clean, was idling v fast on restart so wound the idle screw down...down...down to the stop, cutting head still spinning at a fair clip.

 

The idle screw is seemingly the only adjustment available on this model - cheapo carb presumably - anything else I can check or is it a new carb?

 

Thx.

[spudulike]

Try manually pushing the throttle arm on the carb shut to see if the throttle mechanism isn't sticking open a little.

 

Some of these cutters have a quadrant the cable runs over peg ore connecting to the carb and it has a t27 screw to take up slack in the cable. Check it isn't holding the throttle open

[Stubby]

Air getting in somewhere ?

[spudulike]

Air getting in somewhere ?

 

That's quite possible!

[Rich2484]

I would go with spud on this and the throttle not being back properly. Too tight and holding the butterfly open.

[RichardT]

Well, the Arbtalk Brains Trust nails it again. Virtual drinks all round.

 

Throttle ass'y looked fine, but looked again and when I'd reseated the brass end cap that locates the cable sleeve on the quadrant, I'd apparently jammed a detached bit of the plastic inner coating in front of it, so it was about 3-4mm short of its stop.

 

Sloppy.

 

But not expensive!

[Stubby]

Well, the Arbtalk Brains Trust nails it again. Virtual drinks all round.

 

Throttle ass'y looked fine, but looked again and when I'd reseated the brass end cap that locates the cable sleeve on the quadrant, I'd apparently jammed a detached bit of the plastic inner coating in front of it, so it was about 3-4mm short of its stop.

 

Sloppy.

 

But not expensive!

 

Must try harder !

[spudulike]

Group hug.....comeon - even you Rich:thumbup:

[Rich2484]

Group hug.....comeon - even you Rich:thumbup:

 

Sorry been out on the boat. Think I will let you take this one spud. I know ho which you love the glory. :lol:

 

Hey you just helped fix a stihl. How does that make you feel. :lol:

[Eddy_t]

Hey you just helped fix a stihl. How does that make you feel. :lol:

 

You promoted husqvarna chainsaws as superior to stihl, how does that make YOU feel?

 

 

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