Stihl KM100R Manual

The Stihl KM100R is a professional-grade KombiMotor powerhead, part of Stihl's multi-task tool system. It features a 27.2cc 2-MIX engine for reduced emissions and fuel consumption, a decompression valve for easier starting, an anti-vibration system, a translucent fuel tank, and a quick-release coupling for attaching various KombiTool attachments. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: KM100R Powerhead, STIHL 2-MIX engine, Anti-Vibration System, Quick-Release Coupling, translucent fuel tank, and throttle trigger lockout.

Feature	Description
2-MIX Engine	27.2cc engine technology for lower emissions and fuel consumption
Decompression Valve	Reduces compression for easier starting
Anti-Vibration System	Reduces vibration for user comfort
Quick-Release Coupling	For fast attachment/detachment of KombiTools
Translucent Fuel Tank	Allows easy fuel level checking
Throttle Trigger Lockout	Prevents accidental throttle activation
Master Control Lever	Combines choke, stop switch, and run positions
Side-access chain tensioner	For easy adjustment on compatible brushcutter attachments
Ergonomic Handle	Designed for comfortable operation
Spark Arresting Muffler	Standard equipment

Safety Information

Read and understand all instructions before use. Always wear appropriate PPE.

1. Personal Protective Equipment (PPE): Always wear safety glasses, hearing protection, heavy-duty gloves, long pants, and sturdy boots.
2. Work Area Safety: Keep bystanders and pets at least 50 feet away. Operate only in good light and visibility.
3. Fuel Safety: Refuel outdoors only, with engine stopped and cool. Use only STIHL MotoMix or 89+ octane gasoline mixed with STIHL HP Ultra oil at 50:1 ratio.
4. Kickback Awareness: Be aware of kickback zone with cutting attachments. Use reduced kickback saw chain.

WARNING! Improper use can cause serious or fatal injury. Do not operate if tired, ill, or under the influence of drugs or alcohol.

Assembly & First Use

Assemble powerhead with chosen KombiTool attachment before first use.

1. Attach Handle: Secure handle to powerhead using provided bolts and tool.
2. Attach KombiTool: Align tool shaft with coupling, push in until it clicks, then pull back to lock.
3. Add Fuel & Oil: Fill fuel tank with correct 50:1 fuel/oil mix. Fill gearbox (on attachment) with STIHL gear oil.
4. Initial Start: Place unit on clear, level ground. Follow starting procedure. Allow engine to warm up at idle.

CAUTION! Ensure all fasteners are tight before operation. Check for fuel leaks.

Specifications

• Powerhead Model: KM100R
• Engine Type: STIHL 2-MIX, single cylinder, 2-stroke
• Displacement: 27.2 cc (1.66 cu. in.)
• Power Output: 1.3 kW (1.8 bhp)
• Fuel/Oil Ratio: 50:1 (STIHL MotoMix or 89+ octane gas with STIHL HP Ultra oil)
• Fuel Tank Volume: 0.53 L (18 fl. oz.)
• Weight (Powerhead only): 5.4 kg (11.9 lbs)
• Sound Pressure Level: Approx. 99 dB(A)
• Vibration Level (Front/Rear Handle): Approx. 4.5/2.5 m/s²
• Warranty: Limited warranty for personal use. See manual for details.

Controls and Components

Familiarize yourself with all controls before starting.

Powerhead Controls: Master Control Lever (Choke, Stop, Run), Throttle Trigger, Throttle Trigger Lockout, Primer Bulb, Fuel Tank Cap, Quick-Release Coupling Lever.

Handle: Includes rear handle with throttle trigger and front handlebar. Vibration dampening elements are integrated.

Starting Procedure: 1. Press fuel primer bulb 5-10 times. 2. Set Master Control Lever to choke (cold start) or run (warm start). 3. Press throttle trigger lockout and squeeze throttle trigger once. 4. Place unit on ground, hold front handle, put foot through rear handle. 5. Pull starter rope briskly until engine fires. 6. Move Master Control Lever to run position. 7. Pull starter rope again to start.

Attaching KombiTools

The KM100R is compatible with the STIHL KombiSystem line of attachments.

1. Ensure powerhead is off and cool.
2. Pull back the Quick-Release Coupling Lever fully.
3. Insert the drive tube of the KombiTool (e.g., BC, HL, HT, HS, FS) into the coupling.
4. Push the tool in firmly until you hear/feel a click.
5. Release the lever. Pull back on the attachment to ensure it is locked.
6. For attachments with a shaft lock (like trimmer heads), engage the shaft lock before attaching to prevent shaft rotation.

Tip: Keep coupling clean and lightly lubricated with STIHL lubricant for smooth operation.

Starting & Operating

Follow correct procedure for safe and efficient operation.

1. Cold Start: Follow starting procedure with Master Control Lever in choke position.
2. Warm Start: Follow starting procedure with Master Control Lever in run position.
3. Operation: Allow engine to warm up at idle for 30 seconds. Use smooth throttle control. Avoid full throttle for extended periods when not cutting.
4. Stopping: Release throttle, allow engine to idle briefly, then move Master Control Lever to STOP (0) position.
5. Using Attachments: Refer to the specific manual for each KombiTool (e.g., brushcutter, hedge trimmer, pole pruner) for correct operating techniques and safety rules.

WARNING! Never operate the unit with a damaged or improperly attached cutting attachment. Always shut off engine before making adjustments.

Maintenance Schedule

Regular maintenance ensures long life and safe operation.

Interval	Task
Before each use	Check for loose fasteners, damage, fuel leaks. Check cutting attachment security and condition.
Daily	Clean exterior, check air filter, clean spark plug.
Every 3 months or 50 hrs	Clean fuel filter, replace air filter, check spark arrester screen.
Every 6 months or 100 hrs	Replace spark plug, clean cooling fins, check anti-vibration elements.
Annually	Have unit inspected by an authorized STIHL servicing dealer.

CAUTION! Use only genuine STIHL replacement parts. Disconnect spark plug boot before performing maintenance.

Storage

Prepare unit for storage if it will not be used for more than 30 days.

1. Drain fuel tank completely and run engine until it stops to empty carburetor.
2. OR, add STIHL Fuel Stabilizer to a full tank of fuel and run engine for 2 minutes.
3. Remove spark plug, add a teaspoon of engine oil into cylinder, pull starter rope slowly 2-3 times, reinstall plug.
4. Thoroughly clean entire unit.
5. Store in a dry, secure place, out of reach of children.

CAUTION! Never store unit with fuel in the tank in an enclosed area. Fuel vapors are explosive.

Warranty Information

STIHL Limited Warranty: The KM100R powerhead is covered by a STIHL limited warranty for personal use. The warranty period varies by region. Proof of purchase from an authorized STIHL dealer is required. This warranty covers defects in material and workmanship. It does not cover damage from misuse, neglect, improper maintenance, commercial use, or normal wear. For full warranty terms and your specific warranty period, contact your STIHL dealer or visit www.stihlusa.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine will not start	No fuel, flooded engine, dirty air filter, faulty spark plug	Check fuel level. Set Master Control to run, hold throttle open, pull starter briskly 10+ times. Clean/replace air filter and spark plug.
Engine starts but dies	Clogged fuel filter, dirty carburetor, faulty fuel line	Replace fuel filter. Have carburetor serviced by dealer. Check fuel lines.
Loss of power	Dirty air filter, clogged spark arrester, old fuel	Clean air filter and spark arrester screen. Use fresh fuel mix.
Excessive vibration	Damaged cutting attachment, loose fasteners, worn AV mounts	Inspect attachment for damage. Tighten all bolts. Have AV system checked by dealer.
Attachment won't engage	Drive shaft/shear pin broken, clutch worn, coupling not locked	Check shear pin on attachment. Ensure coupling is fully locked. Have clutch inspected by dealer.

Service: For repairs beyond basic maintenance, take your KM100R to an authorized STIHL servicing dealer.

Support: www.stihlusa.com or contact your local STIHL dealer.