Troy-Bilt 12087 Owner's/Operator's Manual page 57

Maintenance/Repairs
AIR CLEANER MAINTENANCE
The engine is equipped with a
dual element air cleaner that filters
the air twice before it enters the
carburetor to mix with the fuel.
It is critical that the filters be
kept clean and properly installed at
all times. See the location of the
air cleaner assembly on your en-
gine by referring to Figure 5-39 or
Figure 5-40.
Refer to the engine manufac-
turer's literature supplied with your
tiller for complete air cleaner ser-
vice and maintenance information.
THROTTLE CABLE
MAINTENANCE
WARNING
To help avoid personal injury,
stop the engine, wait for all
moving parts to come to a
complete stop,remove the
electric start key, disconnect
the spark plug wire and move
the wire away from the spark
plug, and let the engine and
muffler cool before adjusting
the throttle cable.
SPARK PLUG
MAINTENANCE
The spark plug (see Figure 5-
41) must be in good condition for
proper engine operation. Remove
and inspect the plug every 50 oper-
ating hours or annually, whichever
occurs first.
The correct electrode gap for the
Briggs & Stratton engine is .030".
Check the gap with a feeler gauge.
Do not use a spark plug if the
porcelain is cracked, the electrodes
are pitted or burned, or if other vis-
ible damage is present. Note: Do
not wire brush or sandblast the
spark plug to clean it - loose parti-
cles can enter the engine, causing
damage!
Figure 5-39: Air cleaner
on
the 7HP
Briggs & Stratton engine.
The throttle lever settings are
factory-adjusted, so unnecessary
adjustments should not be made.
However, if the engine does not
start or stop, or respond immedi-
ately to various throttle lever set-
tings, then adjustments may be
necessary. Please refer to the en-
gine manufacturer literature sup-
plied with your tiller for specific
adjustment instructions.
Of course, you may contact
your nearest authorized engine ser-
vice dealer for throttle cable ad-
Figure 5-41: Spark plug (with boot
on) is
on
the top of the engine (BHP
IP engine shown).
To replace the plug, first tighten
it securely by hand, then use a
spark plug wrench to tighten the
plug an extra 1/4 turn.
57
Figure 5-40: Air cleaner
on
the BHP
IP Briggs & Stratton engine.
justments by a qualified service
representative.
IGNITION SYSTEM
MAINTENANCE
Your engine is equipped with
electronic ignition. It does not
have a condenser or points, so
there is no need to perform any
regular "tune-up" maintenance on
this system other than adjusting or
replacing the spark plug.