Stihl weedeater fs 80

FS 80 & 80 R Trimmer/Brushcutter

Featuring the STIHL 25.4 cc "Pro" engine and a flex cable drive. High performance clutch minimizes slippage under extreme conditions. (Protective glasses are supplied.)

Note: Barrier bar and large deflector must be attached when using a grass blade with loop handle trimmer.

Model Features

Optional Accessories

FS 85 & 85 R Trimmer/Brushcutter

Quick-starting engine and solid drive shaft are ideal for professional use. High tensile strength aluminum outer tubes offer high quality and light weight. Can be used with gearhead attachments. (Protective glasses provided.)

Note: Barrier bar and large deflector must be attached when using a grass blade with loop handle.

Model Features

Optional Accessories

FS 85 RX Xtreme Professional
Series Line Trimmer

The powerful, FS 85 RX is an ideal unit for professionals who use string heads. Lightweight driveshaft. Standard features include ElastoStart shock-absorbing starter handle and fuel primer bulb, AUTOCUT® 2-line cutting head, and heavy-duty dual-stage air filter. For use only with string and PolyCut cutting heads.(Protective glasses supplied with these units.)

Not available in all areas.

Model Features

Note: Gearbox attachments are not approved for
use with the FS 85RX.

FS 85 RX Xtreme Professional
Series Line Trimmer

The powerful, FS 85 RX is an ideal unit for professionals who use string heads. Lightweight driveshaft. Standard features include ElastoStart shock-absorbing starter handle and fuel primer bulb, AUTOCUT® 2-line cutting head, and heavy-duty dual-stage air filter. For use only with string and PolyCut cutting heads.(Protective glasses supplied with these units.)

Not available in all areas.

Model Features

Note: Gearbox attachments are not approved for
use with the FS 85RX.

FS 110 & 110 R Trimmer/Brushcutter

Revolutionary new engine design is powerful, lightweight and fuel efficient. Professionals will appreciate the fast acceleration and cutting torque. The STIHL 4-MIX® engine meets EPA 2005 standards. (Protective glasses supplied with these units.)

Note: Barrier bar and large deflector must be attached when using a grass blade with loop handle.

Model Features

• Anti-vibration
• EASYSTART®
• Solid driveshaft
• Toolless fuel cap
• Interchangeable gear boxes
• Powered by STIHL 4-MIX® engine
• Patented lubrication technology meets
  emissions standards (EPA-2005)
• Quiet
• Uses 50:1 fuel mix, just like other STIHL products, no separate oil supply to maintain so it can be operated in all positions
• High engine speed means faster line head
  speed for smoother cuts
• High torque gives quick, smooth acceleration
• Lightweight, balanced, low-profile design makes it
  comfortable to use all day long
• Fuel efficient engine gives long running time
• Dependable drive shaft gets power to the cutting head
• Uses proven AUTOCUT® 25-2 cutting head
• Lower vibration for comfortable operation
• Click to view the standard features that
  are common to all Stihl trimmers

Optional Accessories

FS 110 RX Trimmer

Revolutionary new engine design is powerful, lightweight and highly fuel efficient. Professionals will appreciate the fast acceleration and cutting torque in high, wet grass. The STIHL 4-MIX® engine meets EPA 2005 standards. Protective glasses supplied with these units.

For use only with string and PolyCut cutting heads.

Model Features

• Anti-vibration
• Lightweight drive shaft reduces weight by .5 lbs.
• Powered by STIHL 4-MIX® engine
• Patented lubrication technology meets
  emissions standards (EPA-2005)
• Quiet
• Uses 50:1 fuel mix, just like other STIHL products, no separate oil supply to maintain so it can be operated in all positions
• High engine speed means faster line head
  speed for smoother cuts
• High torque gives quick, smooth acceleration
• Lightweight, balanced, low-profile design makes it
  comfortable to use all day long
• Fuel efficient engine gives long running time
• Uses proven AUTOCUT® 25-2 cutting head
• Lower vibration for comfortable operation
• Click to view the standard features that
  are common to all Stihl trimmers

FS 250 & 250 R Trimmer/Brushcutter

More power for the professional user to make each job a little easier. Included are the STIHL exclusive EASYSTART® system, IntelliCarb compensating carburetor and a solid steel drive shaft. (Protective glasses supplied with these units.)

Note: Barrier bar and large deflector must be attached when using a grass blade with loop handle.

Model Features

FS 80 R STIHL Professional Series Trimmer

Professional User

You might be wondering how one of the lightest weight STIHL trimmers in our professional series can stand up to your tough jobs. It's because of its straight shaft design and superior power-to-weight. In other words, the FS 80 R grass and weed trimmer is rugged. Ideal for around the home, farm or ranch, its balanced loop handle design makes this trimmer perfect for professional use.

Standard Features:

• Powered by STIHL Professional Series engine
• TapAction^™, 2-line AUTOCUT^® head
• Durable cable drive shaft
• Three-shoe clutch

* Weight without cutting attachment or deflector.

Hi Ian,
On your stihl fs80 trimmer you first need to check for spark and compression. To check for compression w/o a gauge; remove the spark plug and then hold your thumb over the sparkplug hole while turning the engine over with the pull start. You should not be able keep all the pressure in the cylinder with your fingertip no matter how hard you try. Next, check for spark by putting the plug back on the wire but do not thread it in to the cylinder. Touch and hold the threaded end of the plug to the cylinder and then pull the engine over with your other hand and look for a spark at the tip. You may also be able to hear the spark if its good and hot.

I hope you had some oil mixed with your gas when you had that trimmer running? If not its going to be needing a set of rings.

I would also replace the fuel line going from the filter to the carb, and wash out or replace the filter. The carb jet which is closest to the cylinder is the low side, with the other as the high side. Rotate each in to the cylinder with a screwdriver while turning clockwise untill the jets seat. Next turn each jet out 1 and 1/2 turns to start. This will get the engine running. Allow the unit to warm up for a minute and adjust the low side jet clockwise by 1/8 turns for the highest idle speed. Once you have attained the high idle, back the jet out an additional 1/8 for good acceleration. Next is the high side, go to full throttle and adjust for highest speed. Again back the jet out an 1/8 turn counter clockwise from highest rpm to keep the high side from being too lean under a load.

Hope this helps you sort it out. Make sure you use a quality air cooled engine oil for your fuel mix. If you have any questions please post them.
Best wishes,
Bob