Briggs & Stratton 21000 Series Operating & Maintenance Instructions page 12

Maintenance
Regular maintenance will improve the performance and
extend the life of the engine. See any Authorized Briggs
& Stratton Dealer for service. Use only.genuine Bricig__
& Stratton parts. Other parts may not perform as
well, may damage the engine, and may result in
_. In addition, use of other parts may void your
warranty.
Emission Control
Maintenance, replacement or repair of the emission
control devices and systems may be performed by
any nonroad engine repair establishment or
individual. However, to obtain no charge repairs under
the terms and provisions of the Briggs & Stratton
warranty statement, any service or emission control part
repair or replacement must be performed by a factory
authorized dealer.
WARNING
,, Disconnect spark plug wire and keep it away
from spark plug.
,, Disconnect battery at negative terminal (only
engines with electric start).
o Use only correct tools.
During maintenance or repairs:
• Do not strike the flywheel with a hammer or
hard object because the flywheel may later
shatter during operation.
• Do not tamper with governor spring, links or
other parts to increase engine speed.
When testing for spark:
• Use approved spark plug tester.
, Do not check for spark with spark plug
removed.
Follow the instructions and schedules indicated below.
Task
Perform task at hourly
or calendar interval,
whichever comes firsL
Before Every Use
8 Hours or
Before Every
Season
50 Hours or
Before Every
Season
* Clean more often under dusty conditions or when airborne debris is present. Replace air cleaner, if very dirty.
** Change oil after first 4 hours of use, then every 8 hours. Change oil every 4 hours when operating the engine
under heavy load or in high temperatures.
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