FS 310 - Grass trimmer STIHL - Free user manual and instructions
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| Product Type | Grass Trimmer |
| Brand | Stihl |
| Model | FS 310 |
| Engine Type | 2-Stroke |
| Displacement | 27.2 cm³ |
| Power Output | 0.9 kW (1.2 hp) |
| Fuel Tank Capacity | 0.33 L |
| Cutting Swath | 38 cm (15 in) with mowing head |
| Weight (without cutting attachment) | 5.1 kg (11.2 lbs) |
| Sound Pressure Level (LpA) | 96 dB(A) |
| Sound Power Level (LwA) | 108 dB(A) |
| Vibration Level (left/right handle) | 3.5/3.0 m/s² |
| Drive Type | Centrifugal clutch |
| Cutting Head | AutoCut 25-2 |
| Blade Option | Metal blade compatible |
| Anti-Vibration System | Yes |
| Starter System | Easy2Start™ |
| Fuel Mix Ratio | 50:1 (STIHL HP Ultra oil) |
| Spark Plug | NGK BPMR7A |
| Maintenance Interval (air filter) | 25 hours |
| Repair Support | Authorized STIHL dealers |
Frequently Asked Questions - FS 310 STIHL
How do I start the FS 310?
Ensure the choke lever is in the closed position for a cold start. Set the throttle trigger to idle, then pull the starter cord firmly until the engine fires. Open the choke and pull again to start running.
What fuel mixture does the FS 310 require?
Use a 50:1 mix of unleaded gasoline (90 octane or higher) and STIHL HP Ultra two-stroke oil. Do not use pre-mixed fuel from gas stations.
How do I replace the trimmer line?
Turn the mowing head counterclockwise to remove the cap. Take out the empty spool, insert new 2.4 mm line, wind evenly, and feed through the eyelets. Reassemble the head.
Can I use a metal blade on the FS 310?
Yes, the FS 310 is compatible with STIHL metal blades for clearing brush. Ensure the correct blade guard is installed and the blade is properly mounted.
How often should I clean the air filter?
Clean the air filter every 25 hours of operation or more frequently in dusty conditions. Wash with warm soapy water, dry, and re-oil before reinstalling.
What is the correct spark plug gap?
The recommended spark plug is NGK BPMR7A with a gap of 0.5 mm. Adjust if necessary before installation.
How do I adjust the carburetor?
Carburetor adjustment should be performed by a qualified technician. The idle speed screw is accessible, but for correct mixture settings, consult a STIHL dealer.
Why does my FS 310 vibrate excessively?
Excessive vibration may indicate a loose or damaged cutting attachment, a bent shaft, or worn anti-vibration elements. Inspect and replace as needed.
How do I store the trimmer for winter?
Drain the fuel tank completely, run the engine until it stops. Clean the trimmer, apply a light oil to metal parts, and store in a dry place. Remove the spark plug and add a teaspoon of oil into the cylinder, then pull the starter cord slowly.
Where can I find replacement parts?
Original STIHL replacement parts are available at authorized STIHL dealers. Use only genuine parts to ensure safety and performance.
User questions about FS 310 STIHL
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USER MANUAL FS 310 STIHL
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Product information
Brand : STIHL
Model : FS 310
Category : Grass trimmer