Cub Cadet 3186 - Manual (Page 29)

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To remove the spark plugs, always
use a spark plug wrench. Check the
gap after every 100 hours of
operation.
Replace a defective plug with a new
plug. Set the spark plug gap at .040
inch. Tighten the plug to 18-22 ft-lbs.
See your authorized dealer for the
correct replacement plug.
Changing Fuel Filter
WARNING: Do not replace
the fuel filter when engine is
hot.
The engine is equipped with an in-line
fuel filter. Visually inspect the filter
periodically for a build-up of residue
inside the filter body, and for a dirty
element which can be indicated by
discoloration. Replace the fuel filter
when dirty.
Changing Air Cleaner
Figure 27
Check the air cleaner daily or before
starting the engine. Check for loose or
damaged components and check the
condition of the filter element. Remove
any buildup of dirt and debris in the air
cleaner housing.
See Figure 27 for assembly of the
Aircleaner elements.
WARNING: Operating the
engine with loose or dam-
aged air cleaner components
will allow unfiltered air into
the carburetor, causing
extensive wear and eventual
failure of the engine.
Servicing The Precleaner
Wash and re-oil the foam precleaner
more often under extremely dusty or
dirty conditions. See Figure 27.
• Loosen the aircleaner cover knob
and remove the cover.
• Remove the foam precleaner by
sliding it up off the paper element.
• Wash the precleaner in warm water
with detergent. Rinse the precleaner
thoroughly until all traces of the
detergent are eliminated. Squeeze
out (do not wring) excess water in a
dry cloth. Allow the precleaner to air
dry.
• Saturate the foam precleaner with
new engine oil. Squeeze out all
excess oil in a dry cloth.
• Reinstall the foam precleaner over
the paper element.
• Position the air cleaner cover so
that the knob engages the stud of
the base assembly and tighten the
knob
Air Cleaner
Cover w/Knob
Element Cover
Element Cover
Foam
Paper Element
Air Cleaner Base
Precleaner
Rubber Seal
Wing Nut