Stihl KM 90 R Instruction Manual

Pages 68

Year 2015

Language(s)

of 68

Stihl KM 90 R Specification

The Stihl KM 90 R is a versatile and robust multi-task power tool designed for both professional landscapers and demanding homeowners. At its core is a powerful 28.4 cc (1.73 cu. in.) air-cooled, 2-stroke engine, offering a formidable balance of performance and efficiency. The engine is equipped with Stihl’s advanced stratified charge technology, which optimizes the air-fuel mixture for reduced emissions and improved fuel efficiency, aligning with stringent environmental regulations.

This model features a lightweight and ergonomic design, weighing approximately 4.4 kg (9.7 lbs) without attachments, ensuring ease of use and maneuverability during extended periods of operation. The ergonomic loop handle provides enhanced control and comfort, particularly beneficial when working in confined or awkward spaces. Additionally, the KM 90 R incorporates a quick-release coupler, allowing for swift and tool-free attachment changes, thereby increasing productivity and versatility.

The multi-task system of the KM 90 R supports a wide array of attachments, transforming it into a trimmer, edger, blower, cultivator, and more, depending on the user's requirements. Its robust construction and high-quality components ensure durability and longevity, even in demanding conditions. The intuitive control handle with a stop switch and throttle trigger lockout enhances operational safety and ease of use.

Designed for reliable performance, the KM 90 R includes a high-capacity fuel tank, minimizing the need for frequent refueling, thus maximizing operational time. It is renowned for its smooth operation and low vibration levels, contributing to reduced user fatigue. Overall, the Stihl KM 90 R exemplifies efficiency, versatility, and durability, making it a preferred choice for users seeking a comprehensive solution for various landscaping and maintenance tasks.

Stihl KM 90 R F.A.Q.

How do I start the Stihl KM 90 R engine?

To start the Stihl KM 90 R engine, set the choke lever to the cold start position, press the fuel pump primer bulb at least 5 times, set the throttle trigger to the start position, and then pull the starter rope until the engine fires. Once it starts, move the choke lever to the run position.

What is the correct fuel mix for the Stihl KM 90 R?

The Stihl KM 90 R requires a 50:1 fuel mix ratio. This means mixing 50 parts of gasoline with 1 part of Stihl two-stroke engine oil. Ensure you're using fresh, unleaded gasoline with a minimum octane rating of 89.

How can I clean the air filter on my Stihl KM 90 R?

To clean the air filter, first remove the air filter cover by loosening the screws. Take out the air filter and gently wash it in warm soapy water. Rinse thoroughly and allow it to dry completely before reinstalling. Replace if the filter is damaged or heavily soiled.

What should I do if my KM 90 R won't start?

If your KM 90 R won't start, check the fuel tank for sufficient fuel and ensure it’s mixed correctly. Inspect the spark plug for fouling, clean or replace if necessary. Ensure the air filter is clean, and check all connections and hoses for blockages or damage.

How often should I perform maintenance on my Stihl KM 90 R?

Regular maintenance should be performed every 25 hours of operation or at least once a season. This includes checking and cleaning the air filter, inspecting the spark plug, checking the fuel system, and lubricating moving parts.

How do I change the spark plug on the KM 90 R?

To change the spark plug, first disconnect the spark plug boot. Use a spark plug socket wrench to remove the old spark plug. Check the gap on the new spark plug, and adjust if necessary. Install the new spark plug, tightening it securely, and reconnect the spark plug boot.

What attachments are compatible with the Stihl KM 90 R?

The Stihl KM 90 R is compatible with a variety of KombiSystem attachments, including a string trimmer, hedge trimmer, pole pruner, blower, cultivator, and more. Ensure each attachment is properly secured before use.

How do I store the Stihl KM 90 R for the winter?

For winter storage, empty the fuel tank and run the engine until it stops. Clean the tool, and check for any damage that needs repair. Store it in a dry, cool place, away from direct sunlight and moisture.

Why does my KM 90 R vibrate excessively during operation?

Excessive vibration can be caused by damaged or unbalanced cutting attachments, loose bolts, or worn engine mounts. Inspect and replace any damaged parts, and ensure all bolts are tightened properly.

What safety precautions should I follow when using the Stihl KM 90 R?

Always wear protective gear, including goggles, gloves, and ear protection. Make sure the work area is clear of debris and bystanders. Follow the user manual instructions carefully, and never modify the tool in any way.