0458-459-8221-C
36
English 
25 Emission Control Warranty
– Muffler
– Spark Plug
– Catalytic Converter (if applicable)
– Choke (Cold Start Enrichment System) (if applicable)
– Injection Pump (if applicable)
– Injection Valve (if applicable)
– Throttle Housing (if applicable)
Where to Make a Claim for Warranty Service
Bring the product to any authorized STIHL servicing dealer 
and present the signed warranty card.
Maintenance Requirements
The maintenance instructions in this manual are based on 
the application of the recommended 2-stroke fuel-oil mixture 
(see also instruction "Mixing Fuel"). Deviations from this 
recommendation regarding quality and mixing ratio of fuel 
and oil may require shorter maintenance intervals.
Limitations
This Emission Control Systems Warranty shall not cover any 
of the following:
– repair or replacement required because of misuse, 
neglect or lack of required maintenance,
– repairs improperly performed or replacements not 
conforming to STIHL Limited specifications that adversely 
affect performance and/or durability, and alterations or 
modifications not recommended or approved in writing by 
STIHL Limited,
– replacement of parts and other services and adjustments 
necessary for required maintenance at and after the first 
scheduled replacement point.