Stihl KM 90 Instruction Manual

Pages 82

Year 2009

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of 82

Stihl KM 90 Specification

The Stihl KM 90 is a versatile and robust multi-task tool powered by a dependable 28.4 cc, 4-MIX® engine, which combines the benefits of a 4-stroke engine with the efficiency and power of a 2-stroke engine. This innovative engine design offers reduced emissions, increased fuel efficiency, and quieter operation, making it environmentally friendly and suitable for residential and professional use. The KM 90 features a lightweight design, weighing approximately 4.6 kg (10.1 lbs), and an ergonomic loop handle, enhancing user comfort and control during extended periods of operation. Its advanced anti-vibration system further minimizes operator fatigue by reducing vibrations transmitted to the user's hands.

The unit includes a multi-function control handle, allowing for easy access to all controls for enhanced operational convenience. Its quick-release coupling system enables the seamless exchange of various attachments, transforming the KM 90 into a versatile tool capable of handling tasks such as trimming, edging, pruning, and more. The easy-to-access purge pump primer facilitates effortless engine starting, while the simplified starting procedure ensures reliability under diverse working conditions.

Incorporated with a large fuel tank capacity of approximately 0.53 liters, the KM 90 ensures extended operating times with fewer refueling interruptions. The robust and durable construction of the Stihl KM 90 ensures longevity and reliability, even in demanding environments. This multi-task tool is part of Stihl's KombiSystem, which offers a wide range of compatible attachments, providing users with the flexibility to tackle various landscaping and maintenance tasks efficiently. With its combination of power, efficiency, and adaptability, the Stihl KM 90 is an ideal choice for users seeking a reliable multi-task tool to meet diverse outdoor needs.

Stihl KM 90 F.A.Q.

How do I start the Stihl KM 90 engine correctly?

To start the Stihl KM 90, set the control lever to the start position, press the primer bulb several times until fuel is visible, pull the starter rope until the engine fires, and then quickly move the control lever to the run position.

What should I do if the KM 90 engine doesn't start?

If the engine doesn't start, check for fuel in the tank, inspect the spark plug for fouling, ensure the air filter is clean, and verify that the choke is correctly set.

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

To maintain the air filter, remove the cover, take out the filter, and clean it with warm soapy water. Allow it to dry completely before reinstalling. Replace the filter if it's damaged or excessively dirty.

What fuel mixture is recommended for the Stihl KM 90?

The Stihl KM 90 requires a 50:1 fuel mixture of unleaded gasoline and 2-stroke engine oil. Ensure the gasoline has an octane rating of 89 or higher.

How often should I sharpen the cutting blades on my KM 90?

Sharpen the cutting blades whenever you notice a decrease in cutting performance or after every 25 hours of use. Use a proper file and maintain the correct angle for optimal performance.

What could cause the KM 90 engine to run rough or stall?

An engine running rough or stalling could be due to a clogged air filter, dirty fuel filter, or a fouled spark plug. Clean or replace these components as needed and check the carburetor settings.

How do I change the spark plug on my Stihl KM 90?

To change the spark plug, disconnect the spark plug boot, use a spark plug wrench to remove the old plug, and install a new one with the correct gap. Reattach the boot securely.

What types of attachments can be used with the Stihl KM 90?

The Stihl KM 90 can be used with a variety of attachments, including a trimmer, edger, hedge trimmer, and pole pruner, making it a versatile tool for different gardening tasks.

How should I store the Stihl KM 90 during the off-season?

For off-season storage, empty the fuel tank, clean the machine thoroughly, remove the spark plug and add a few drops of oil into the cylinder, and store it in a dry, cool place.

What is the recommended maintenance schedule for the Stihl KM 90?

Regular maintenance includes checking and cleaning the air filter and spark plug after every 10 hours of operation, inspecting the fuel system monthly, and performing an annual check-up by an authorized service center.