Stihl KM 55 Instruction Manual

Stihl KM 55 manual cover
Pages 74
Year 2009
Language(s)
English en
Spanish sp

Stihl KM 55 Specification

The Stihl KM 55 is a versatile and robust multi-tool engine unit designed to facilitate a range of outdoor tasks by serving as the powerhouse for various attachments. The unit is equipped with a reliable 27.2 cc, 2-stroke engine that delivers consistent performance suitable for both residential and light commercial applications. Weighing approximately 4.3 kg, the KM 55 is engineered to be lightweight, ensuring ease of maneuverability and reducing user fatigue during extended periods of use.

This model incorporates Stihl's Easy2Start system, which simplifies the starting process by significantly reducing the amount of pull force required. The engine is air-cooled and features a manual fuel pump (purger) to assist with cold starts, enhancing operational efficiency. The KM 55 is compatible with a wide array of Stihl KombiSystem attachments, allowing it to transform into a trimmer, edger, blower, hedge trimmer, and more, making it an all-in-one solution for diverse landscaping needs.

The ergonomic design of the KM 55 includes an adjustable loop handle, providing flexibility and comfort for users of varying heights and tasks. It also features a quick-release coupling mechanism, facilitating the rapid exchange of attachments without the need for tools. The fuel tank has a capacity of 0.33 liters, providing sufficient runtime for standard garden maintenance tasks. The KM 55 adheres to Stihl's stringent emission standards, promoting an environmentally friendly operation. Its compact design combines durability with functionality, making it an ideal choice for users seeking a reliable and adaptable gardening tool.

Stihl KM 55 F.A.Q.

How do I start the Stihl KM 55 engine properly?

To start the Stihl KM 55 engine, ensure the engine switch is in the "On" position, set the choke lever to "Cold Start" if the engine is cold, press the fuel pump bulb at least five times, and pull the starter rope until the engine fires. Then, set the choke lever to "Run" and pull the starter rope again until the engine starts.

What should I do if the KM 55 engine won't start?

If the KM 55 engine won't start, check the fuel level and quality, ensure the spark plug is clean and properly connected, verify the air filter is not clogged, and ensure the engine switch is turned on. If problems persist, consult the user manual or contact a service professional.

How often should I perform maintenance on the Stihl KM 55?

Regular maintenance should be performed after every 25 hours of operation. This includes cleaning the air filter, checking the spark plug, and inspecting the fuel system for leaks. Annually, or after 100 hours, replace the air filter, fuel filter, and spark plug.

What fuel mixture is recommended for the Stihl KM 55?

The Stihl KM 55 requires a 50:1 fuel mixture, which is 50 parts gasoline to 1 part 2-stroke engine oil. Always use fresh, high-quality gasoline with a minimum octane rating of 89.

How do I replace the trimmer line on the KM 55?

To replace the trimmer line, remove the spool from the trimmer head, cut a length of line approximately 15 feet long, and wind it evenly onto the spool. Secure the line ends in the designated slots, reattach the spool, and ensure it is fastened securely.

What are common troubleshooting steps for power loss in the KM 55?

For power loss issues, check the air filter for dirt and clean it if necessary, inspect the spark plug for wear or damage, verify the fuel quality, and ensure the exhaust is not blocked. Clean or replace parts as needed.

Why is my KM 55 engine overheating?

Engine overheating can be due to a clogged air filter, incorrect fuel mixture, or blocked cooling fins. Clean the air filter, ensure the correct fuel mixture, and inspect the cooling fins for debris.

How can I prevent the KM 55 from vibrating excessively?

Excessive vibration may be caused by imbalanced attachments or worn parts. Check that attachments are installed correctly and inspect for any wear or damage. Tighten any loose bolts and replace worn parts as necessary.

What should I do if the KM 55 stalls during operation?

If the KM 55 stalls, check the fuel level and quality, inspect the spark plug for fouling, and ensure the air filter is clean. Adjust the carburetor settings if necessary and consult the user manual for guidance.

How do I clean the air filter on the Stihl KM 55?

To clean the air filter, remove it from the engine, wash it in a warm, soapy water solution, rinse thoroughly, and allow it to dry completely before reinstalling. Replace the air filter if it is damaged or excessively dirty.