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4.2
Section 4
Air Cleaner and Air Intake System
Figure 4-4. Cleaning Separated Screen Assembly.
Always reinstall the upper blower assembly after it has
been removed for service. Do not operate the engine
with the upper blowing housing or screen removed.
Air Cleaner
General
These engines are equipped with a replaceable, high-
density paper air cleaner element surrounded by an
oil, foam precleaner, located under the upper blower
housing. See Figures 4-5 and 4-6.
Service
Daily or before starting the engine, remove the
upper blowing housing and check the air cleaner
system. See Figures 4-5 and 4-6. Again, check for dirt
or debris and clean it away. Make sure the precleaner
is not damaged, ripped, or missing. The air cleaner
elements must be fastened with the retainer strap, and
the bottom of the element must be sealed against the
air cleaner base. Make sure the base is secured tightly
to the carburetor and not cracked of damaged. Also
make sure the breather hose is secured to the air
cleaner base and to the breather outlet fitting on the
valve cover.
NOTE: Damaged, worn or loose breather hose or air
cleaner components can allow unfiltered air
into the engine causing premature wear and
failure. Tighten or replace all loose or
damaged components.
Figure 4-5. Air Cleaner Assembly.
Figure 4-6. Air Cleaner System Components.
Precleaner Service
If so equipped, wash and reoil the precleaner every 25
hours of operation (more often under extremely dusty
or dirty conditions).
To service the precleaner perform the following steps.
1. Unhook the four retaining straps and remove the
upper blower housing and screen assembly. See
Figure 4-2.
Foam
Precleaner
Air Cleaner
Element
Retainer
Strap
Air Cleaner
Base