#Stihl fs 91 r gas trimmer how to
#Stihl fs 91 r gas trimmer full
#Stihl fs 91 r gas trimmer free

To clean the choke valves, open and close the choke. Spray carburetor cleaner into the air intake inlet and compress the throttle trigger to circulate it. Grime and old oil are emulsified by the cleanser. Use appropriate fuel and change the fuel with new ones after a certain period of time.Ĭarburetor cleaning should be applied to the carburetor components visible beneath the air filter. It is suggested to use ethanol-free fuel with a fuel treatment. The accumulation of fuel in the carburetor clogs it. Fuel Gets Caked Up in The CarburetorĪccording to some reports, the accumulation of fuel in the carburetor can lead to internal troubles with your trimmer. Putting in a new tank vent could be another option for resolving the problem. If the filters need to be changed, do so. You should probably clean the fuel filters because they may have accumulated dirt and debris.

Check the intakes of the valves for wear and replace if necessary. If you want to keep your Stihl running well, you need to use the oil and fuel the company recommends. At higher RPMs, it needs more gas to keep going.ĭamaged gasoline valves, clogged fuel filters, and improper fuel consumption are all potential sources of trouble.

#Stihl fs 91 r gas trimmer full

The FS 91 R features a smooth ride at medium power but surges when given full throttle. Replace the old filter at the fuel line’s end with a new one. Put in a fresh or cleaned spark plug and double-check that the wire is firmly connected. Just go with the suggested fuel options.Ĭlear any debris from the fuel lines, then use a feeler gauge to check the spacing between the spark plugs. The FS 91 R is a 2-cycle string trimmer, and as such, it does not need mixed oil and gas. The gummy deposits left behind by old fuel can potentially obstruct a pipe.Ĭheck the fuel line for any obstructions or kinks that could be causing the string trimmer to misfire. If dirt enters the gasoline system, it can cause the fuel lines to get clogged. Also, remove the shaft, lubricate it and put it back to its place this should solve the issue.

#Stihl fs 91 r gas trimmer free

Remove the centering screw with a wrench to free the shaft from its mounting. See if the transmission and the drive shaft have been damaged, replace if needed. Look for any loose screws after every use to avoid the vibrations. Because of the engine’s vibration, even securely fastened bolts can become loose over time. The shaft on a Stihl trimmer attaches to the power head normally through four screws. Many customers report experiencing uncomfortable vibrations when holding a FS 91 R’s grips. To eliminate any excess debris, scrape the spark plug with a knife. Then check for damaged or clogged spark plugs. It is imperative that you use gasoline containing no more than 10% ethanol or an ethanol-free type, as well as oil intended for two-cycle engines. First, make sure that you are using fresh fuel mix. Changing something as simple as a spark plug or air filter will typically solve the problem. This issue is most likely associated with the ignition system, the fuel, or the air flow in the cylinder. Stihl trimmers have a history of failing to start. Replace worn out clutch, damaged trimmer head or driveshaft. Use ethanol-free fuel, clean the carburetor Lubricate the driveshaft, tighten the screws. Stihl FS91R Common Stihl FS 91 R Problems and Solutions Problems

Displacement: 28.4 cc (1.73 Cubic inches).

#Stihl fs 91 r gas trimmer how to

Keep reading this article all the way through to the end because I’m going to go into detail about the problems and how to fix them.įeatures & Specifications of Stihl FS 91 R SAW: However, it is not problem-free, and you may have similar difficulties if you own FS 91 R.Ĭommon Stihl FS 91 R problems include the following: the trimmer won’t start or won’t keep running the trimmer handle vibrates the acceleration is insufficient the fuel cakes up in the carburetor and the head doesn’t spin. The String Trimmer, Stihl FS 91 R provides long runtime and professional-grade performance.