Q: How to adjust the idle of the STIHL RM 650 VS engine?

The manual for the STIHL RM 650 VS does not include a section dedicated to adjusting the engine idle. This is not considered a standard maintenance adjustment that the user can perform themselves. Why? The idle is a very specific parameter of this 4-stroke engine. An incorrect adjustment can affect starting, fuel consumption, and the overall reliability of the machine. What you can check: Oil level - refer to the section Before each use in your manual Fresh fuel - use unleaded gasoline and check the recommended oil mixture Clutch/brake - test several engagement/disengagement cycles to ensure the engine does not stall If the engine stalls at idle or shows other anomalies, contact an authorized STIHL dealer who can diagnose and adjust the engine parameters if necessary.

Q: Which batteries and chargers are compatible with the STIHL RMA 448 VC?

Authorized batteries: The STIHL RMA 448 VC is powered exclusively by lithium-ion batteries from the STIHL AP series (36 V). Three models are compatible with this mower: AP 100 : maximum mowing speed 3.0 km/h, ideal for small areas AP 200 : maximum mowing speed 3.7 km/h, versatile use AP 300 : maximum mowing speed 4.5 km/h, for large areas Recommended chargers: Three STIHL charger models are compatible with all AP batteries to recharge your mower: AL 101 : compact and lightweight charger AL 300 : versatile mid-range charger AL 500 : high-end fast charger Charging times: Charging times vary depending on battery capacity, charger model used, ambient temperature, and initial charge state. For exact durations based on your setup, refer to the charger manual or visit www.stihl.com/charging-times. Important recommendations: Use only approved original STIHL batteries and chargers for this mower. Non-STIHL batteries can be dangerous (fire or explosion risks) and void the warranty. Store batteries at temperatures between -10 °C and +50 °C, and keep them clean and dry. For maintenance or repairs, contact a specialized STIHL dealer.

Q: How to set the working radius on the STIHL iMow RMI 422 mower robot after defining the starting point?

The STIHL iMow RMI 422 PC mower robot allows you to set a working radius around the starting points , between 3 meters and 30 meters . This radius is defined after programming (learning) the initial starting point. Operation of the working radius: When the robot mows starting from a starting point to which you have assigned a radius, it first mows the entire circular area defined by this radius around the starting point. Once this area is completely mowed, it continues mowing in the rest of the main area. Steps to set the radius after defining the starting point: Access the robot's touchscreen menu in the “Starting Point Settings” section (section 11.15 of the manual) Select the starting point to which you want to assign a radius (starting point 1, 2, 3, or 4) Set the desired radius between 3 m and 30 m according to the area to be prioritized Confirm your setting Important point: By default, no radius is assigned to the registered starting points. The delimitation of the overall mowing area remains defined by the peripheral wire that you install around the lawn, placed about 28 centimeters from the edge of the area to be mowed. The wire can measure up to a maximum length of 500 meters. The radius assigned to the starting point allows the robot to manage hard-to-reach areas (small sector, isolated zone, etc.) by prioritizing them when starting from this specific point, rather than modifying the general delimitation of the peripheral wire.

Q: How to change the spark plug on the STIHL RM 2 RT lawn mower?

Changing the spark plug on the STIHL RM 2 RT lawn mower: Your lawn mower is equipped with a KOHLER HD675 engine (149 cm³) that uses a spark plug NGK DCPR6E (or the equivalent Champion RA6HC). The electrode gap should be set to 0.76 mm (0.030 inches) according to the manufacturer's specifications. Before you begin: Completely stop the engine and wait for it to cool down if the mower has just been used. Disconnect the rubber cable (terminal) from the spark plug to prevent any accidental restart during the operation. To remove the old spark plug: Use a spark plug wrench of about 20 mm or 21 mm (often included with the mower). Insert the wrench onto the spark plug and gently unscrew it by turning to the left. Remove it without forcing. Preparation and installation of the new spark plug: Before installing the new NGK DCPR6E spark plug, check that the gap between the center electrode and the side electrode is indeed 0.76 mm using a gap gauge or a coin (a 1 euro coin is about 0.77 mm). If the gap is incorrect, gently adjust it by bending the side electrode. Hand-thread the new spark plug into the threads to avoid cross-threading, then tighten it with the spark plug wrench without excessive force (a hand-tight plus a quarter turn with the tool is sufficient). Finalization: Firmly reconnect the cable (terminal) of the spark plug until it is well seated. Test the mower's starting to check that everything works correctly. If the mower does not start or runs irregularly, check that the terminal is properly connected and that the gap is correct. Practical tips: Change the spark plug every 100 hours of operation or once a year. If you are not comfortable with this operation or do not have the appropriate tool, contact an authorized STIHL dealer or a workshop specialized in lawn mowers.

Question 1

The mower starts but the blade does not engage

Accepted Answer

If your STIHL RMA 2 RPV starts (the motor runs) but the blade remains inactive, here are the points to check:

1. Check the correct engagement of the blade

According to the product manual, to activate the blade you must press and hold the safety button, then pull the mowing control lever fully towards the handlebar. If you do not pull the lever all the way, the blade will not engage.

2. Check the mowing control lever

The mowing control lever must be pulled fully towards the handlebar to engage the blade rotation at full speed. A partial or incomplete pull will prevent activation.

3. Check the battery

If the battery is low, the safety system may prevent the blade from engaging. Ensure that your STIHL AP battery is properly charged and securely inserted into the compartment.

4. Inspect the blade

According to the manual, the blade must have a minimum thickness of 2 mm and a minimum width of 45 mm. If the blade is worn, damaged, or dull, it may not engage properly. A dull blade should be sharpened by an authorized STIHL dealer.

5. Mower safety

The device has several automatic safety mechanisms. If any of the safety conditions are not met, the blade will not activate. Check that nothing obstructs the control levers and that all safety elements are in place.

If after these checks the blade remains inactive, contact an authorized STIHL service for diagnosis and repair.

Question 2

How to remove the battery from the STIHL FSA 60 R charger?

Accepted Answer

If you are unable to remove the battery from your STIHL FSA 60 R charger, it is generally because the charging is not yet complete. Here is the correct procedure:

Steps to remove the battery

Check the end of the charging - Observe the LEDs (light-emitting diodes) on the charger and the battery. They should be completely off to indicate that the charging is complete. The charger automatically stops charging once the cycle is finished.
Extract the battery - Once the full charge is confirmed (LEDs off), the battery simply engages in the guiding parts of the charger and can be removed without force. There is no physical locking mechanism on this model.

Important advice

Never force to remove the battery. If it seems stuck, wait a few more minutes and check again that all the indicator lights are off. This means that the charging cycle is completely finished and the battery will release easily.

This procedure works for compatible chargers: STIHL AL 101, AL 300, and AL 500.

Question 3

How to adjust the idle of the STIHL RM 650 VS engine?

Accepted Answer

The manual for the STIHL RM 650 VS does not include a section dedicated to adjusting the engine idle. This is not considered a standard maintenance adjustment that the user can perform themselves.

Why? The idle is a very specific parameter of this 4-stroke engine. An incorrect adjustment can affect starting, fuel consumption, and the overall reliability of the machine.

What you can check:

Oil level - refer to the section Before each use in your manual
Fresh fuel - use unleaded gasoline and check the recommended oil mixture
Clutch/brake - test several engagement/disengagement cycles to ensure the engine does not stall

If the engine stalls at idle or shows other anomalies, contact an authorized STIHL dealer who can diagnose and adjust the engine parameters if necessary.

Question 4

My STIHL RM 4 RTP lawn mower is difficult to start, what should I do?

Accepted Answer

If your STIHL RM 4 RTP lawn mower refuses to start or is difficult to start, here are the essential checks to perform in order:

Preliminary Checks

Engine Oil Level - Check that the oil level is sufficient before each start
Ignition Cable - Ensure that the ignition cable is properly connected to the spark plug terminal
Air Filter - A clogged filter can prevent starting. If the filter is dirty, contact a STIHL dealer for cleaning or replacement

Fuel Check

Empty Tank - Ensure that the tank contains fuel
Fuel Quality - Always use fresh unleaded brand gasoline with a minimum octane rating of 90. Do not use old gasoline or mixtures containing more than 10% ethanol

Spark Plug Check

If the spark plug is dirty, blackened, or damaged, clean or replace it

Correct Starting Procedure

Place the mower on a flat surface
With your left hand, push and hold the mowing control bar against the handle
Slowly pull the starter handle until you feel resistance
Pull quickly and let it return until the engine starts

If after these checks the engine still does not start, or if the air filter is really clogged, contact a STIHL dealer for a thorough diagnosis.

Question 5

The cleaner does not restart after stopping

Accepted Answer

If your STIHL RE 118 pressure washer does not restart after stopping, here are the checks to perform:

Safety button - Check that the safety button (2) is pushed down to unlock the lever (1).
Device switch - Ensure that the switch is in position I (on).
Power supply - Check that the electrical plug is properly connected and that the network voltage is correct. Check the integrity of the cable.
Water tap - Open the water tap completely before restarting the device. The device does not start without water.
High-pressure hose - Ensure that the hose is fully unwound.
Cooling - If the device has stopped automatically, wait a few minutes before restarting (thermal safety).

If after these checks the cleaner still does not restart, consult an authorized STIHL dealer for a thorough diagnosis.

Question 6

Can I access the motor of the RE 118 pressure washer?

Accepted Answer

No, access to the motor of the RE 118 is not intended for the user. The STIHL RE 118 manual does not allow the device to be disassembled by the individual.

Maintenance and upkeep that you can perform yourself:

Regularly clean the nozzle to avoid overpressure in the pump
Inspect and clean the water inlet filter every month
Check electrical connections and hoses before each use
Store the device in a dry, frost-free place

For any internal intervention on the motor or pump, you must contact a STIHL specialized dealer who has original spare parts and the appropriate technical documentation.

Question 7

Why does the STIHL RE 118 pressure washer stop after 5 to 10 minutes of use?

Accepted Answer

The STIHL RE 118 has two automatic shut-off mechanisms that may explain this stop:

1. Automatic rest mode (5 minutes)

According to the manual, the device is designed to operate for a maximum of 5 minutes in rest mode. If you do not continuously press the trigger or if you take prolonged breaks, the device will automatically stop. This is a normal protection to prevent unnecessary wear on the high-pressure pump. Simply restart the device to continue.

2. Thermal protection against overheating

If the stop occurs during active and continuous use, it may be due to overheating of the motor. In this case:

The automatic shut-off is a normal protection of the motor
Allow the device to cool down for at least 5 minutes before restarting it
Ensure that you are using the device in a well-ventilated area
Make sure that the water inlet hose is properly connected and the water tap is open - a lack of water leads to rapid overheating

Key advice: If the stop occurs after 5-10 minutes simply because you release the trigger, this is normal operation. If the stop occurs even during continuous use, check the water supply and allow the motor to cool down.

Question 8

Which batteries and chargers are compatible with the STIHL RMA 448 VC?

Accepted Answer

Authorized batteries:

The STIHL RMA 448 VC is powered exclusively by lithium-ion batteries from the STIHL AP series (36 V). Three models are compatible with this mower:

AP 100: maximum mowing speed 3.0 km/h, ideal for small areas
AP 200: maximum mowing speed 3.7 km/h, versatile use
AP 300: maximum mowing speed 4.5 km/h, for large areas

Recommended chargers:

Three STIHL charger models are compatible with all AP batteries to recharge your mower:

AL 101: compact and lightweight charger
AL 300: versatile mid-range charger
AL 500: high-end fast charger

Charging times: Charging times vary depending on battery capacity, charger model used, ambient temperature, and initial charge state. For exact durations based on your setup, refer to the charger manual or visit www.stihl.com/charging-times.

Important recommendations: Use only approved original STIHL batteries and chargers for this mower. Non-STIHL batteries can be dangerous (fire or explosion risks) and void the warranty. Store batteries at temperatures between -10 °C and +50 °C, and keep them clean and dry. For maintenance or repairs, contact a specialized STIHL dealer.

Question 9

How to set the working radius on the STIHL iMow RMI 422 mower robot after defining the starting point?

Accepted Answer

The STIHL iMow RMI 422 PC mower robot allows you to set a working radius around the starting points, between 3 meters and 30 meters. This radius is defined after programming (learning) the initial starting point.

Operation of the working radius: When the robot mows starting from a starting point to which you have assigned a radius, it first mows the entire circular area defined by this radius around the starting point. Once this area is completely mowed, it continues mowing in the rest of the main area.

Steps to set the radius after defining the starting point:

Access the robot's touchscreen menu in the “Starting Point Settings” section (section 11.15 of the manual)
Select the starting point to which you want to assign a radius (starting point 1, 2, 3, or 4)
Set the desired radius between 3 m and 30 m according to the area to be prioritized
Confirm your setting

Important point: By default, no radius is assigned to the registered starting points. The delimitation of the overall mowing area remains defined by the peripheral wire that you install around the lawn, placed about 28 centimeters from the edge of the area to be mowed. The wire can measure up to a maximum length of 500 meters.

The radius assigned to the starting point allows the robot to manage hard-to-reach areas (small sector, isolated zone, etc.) by prioritizing them when starting from this specific point, rather than modifying the general delimitation of the peripheral wire.

Question 10

How to change the spark plug on the STIHL RM 2 RT lawn mower?

Accepted Answer

Changing the spark plug on the STIHL RM 2 RT lawn mower:

Your lawn mower is equipped with a KOHLER HD675 engine (149 cm³) that uses a spark plug NGK DCPR6E (or the equivalent Champion RA6HC). The electrode gap should be set to 0.76 mm (0.030 inches) according to the manufacturer's specifications.

Before you begin: Completely stop the engine and wait for it to cool down if the mower has just been used. Disconnect the rubber cable (terminal) from the spark plug to prevent any accidental restart during the operation.

To remove the old spark plug: Use a spark plug wrench of about 20 mm or 21 mm (often included with the mower). Insert the wrench onto the spark plug and gently unscrew it by turning to the left. Remove it without forcing.

Preparation and installation of the new spark plug: Before installing the new NGK DCPR6E spark plug, check that the gap between the center electrode and the side electrode is indeed 0.76 mm using a gap gauge or a coin (a 1 euro coin is about 0.77 mm). If the gap is incorrect, gently adjust it by bending the side electrode. Hand-thread the new spark plug into the threads to avoid cross-threading, then tighten it with the spark plug wrench without excessive force (a hand-tight plus a quarter turn with the tool is sufficient).

Finalization: Firmly reconnect the cable (terminal) of the spark plug until it is well seated. Test the mower's starting to check that everything works correctly. If the mower does not start or runs irregularly, check that the terminal is properly connected and that the gap is correct.

Practical tips: Change the spark plug every 100 hours of operation or once a year. If you are not comfortable with this operation or do not have the appropriate tool, contact an authorized STIHL dealer or a workshop specialized in lawn mowers.

User manual STIHL : user manuals and guides in PDF

Models STIHL most viewed

Browse manuals STIHL by appliance type

Recent questions about devices STIHL