Stihl FS 510 C Instruction Manual page 54

English
Maintenance Requirements
The maintenance instructions in this
manual are based on the application of
the recommended 2-stroke fuel-oil
mixture (see also instruction "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:
1. repair or replacement required
because of misuse, neglect or lack
of required maintenance
2. 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
3. replacement of parts and other
services and adjustments
necessary for required maintenance
at and after the first scheduled
replacement point
52 FS 510 C, FS 560 C