Stihl Km 131 R Parts Diagram (2024)

FAQs

What is the fuel mix for a STIHL 131r? ›

All STIHL gasoline-powered equipment uses a 50:1 gas and oil mixture.

First, locate the three adjustment screws on the carburetor body. Turn the "L" screw clockwise until it lightly seats, then back it off counterclockwise one and a half turns. Repeat the same process with the "H" screw. Finally, turn the "LA" screw clockwise until the engine runs smoothly at idle, but doesn't stall.

Your engine requires a mixture of gasoline and engine oil. For health reasons, avoid direct skin contact with gasoline and avoid inhaling gasoline vapor. STIHL recommends the use of STIHL MotoMix.

The FS 131 engine is also environmentally friendly and can accept a wide variety of steel cutting blades as well as trimmer line up to . 105.

STIHL recommends that customers use a minimum of 89 octane fuel. If a customer chooses to use a 91 or 93 octane fuel, no damage to the engine will result. However, using an 87 octane fuel could lead to serious engine damage.

STIHL Fuel Stabiliser eliminates the need to drain fuel prior to storage. It also contains a water remover to prevent corrosion and carburettor cleaner to restore power. 15ml treats 5 litres of fuel.

STIHL recommends the use of STIHL MotoMix. This ready-to-use fuel mix contains no benzol or lead, has a high octane rating and ensures that you always use the right mix ratio. STIHL MotoMix uses STIHL HP Ultra two-stroke engine oil for an extra long engine life.

Runs on a fuel oil mix just like a 2 stroke, but offers the benifits of 4 stroke power. STIHL 4 MIX® engine technology provides fast acceleration, more power, added torque, lower noise, reduced emissions and increased fuel efficiency.

The Stihl KombiSystem is a powerful engine with a choice of KombiTool attachments - whether it's trimming hedges, edging lawns, turning borders or sweeping paths the Stihl KombiSystem will take the effort out of those tough garden jobs. The all-purpose MultiSystem from Stihl soon has your garden shipshape again.

For professional trimmers, the “R” indicates a loop handle, and all other trimmers have bicycle-style handles.

What does FS mean for STIHL? ›

MS= Motosäge = Chainsaw. FS= Freischneider = Line Trimmer. BG= Blasgerät = Handheld Blower.

Note: Not all diameters are approved for all STIHL trimmers – please refer to your instruction manual to see what diameters of trimmer line are approved for your model of STIHL trimmer.

Use a 40:1 two-cycle oil mix ratio. One gallon of gasoline combined with 3.2 oz of two-cycle engine oil. Unsure of the age of your equipment? Use the 40:1 mixture.

If your manufacturer recommends a 50:1 fuel/oil mix, it means you need 50 parts of gas to one part two-stroke oil. To mix one gallon of fuel at 50:1, add 2.6 ounces of two-stroke oil to one gallon of gas, as shown in the chart below.

We recommend a 50:1 mix ratio (20mls oil per 1 litre fuel) when using STIHL 2-Stroke oil. If you're using a different brand of 2-Stroke oil, you'll need to mix at 25:1 (40mls oil per 1 litre fuel).

40 to 1 ratio

If you are unsure 40:1 is a middle range 2 stroke fuel ratio. This equals 25mls of two stroke oil to 1 litre of petrol. It is pretty easy to calculate, you just multiply the litre amount by 25.