9
CHAPTER 2 AIR CLEANERS
TROUBLESHOOTING
If the engine's performance is unsatisfactory (needs
excessive adjustments, starts smoking abnormally, loses
power), the first component to be checked is the air
cleaner. A dirt restricted or an oil soaked filter element will
cause noticeable performance problems. A polyurethane
element may be cleaned following the service procedure
listed under "Service" in this chapter. A paper-type air filter
should only be replaced. Follow the procedure listed in the
service section in this chapter for replacement. Retry the
engine after filter replacement or service. If the problem
persists after filter service, additional solutions can be
found in Chapter 7 under "Troubleshooting".
SERVICE
Cleaning and oiling the polyurethane element (diag. 2-1)
is recommended every three (3) months or every 25
operating hours. If the engine is used in extremely dusty
or dirty conditions, the filter may require service every
three hours or as often as necessary to maintain proper
engine performance.
Polyurethane type filters require re-oiling after extended
storage due to oil migration out of the filter.
A paper type element (diag. 2-2) should be replaced once
a year, every 100 operating hours, or more often if used in
extremely dusty conditions. Use only original factory
recommended replacement filters.
NOTE
DO NOT attempt to clean or oil paper filters.
Air Cleaner Screen
Polyurethane Filter
2-1
2-2
Air Cleaner
Collar
Clamp
Cover
GENERAL INFORMATION
The air cleaner is designed to eliminate dust and dirt from the air supply. Most models of 2-cycle and 4-cycle engines
use an air cleaner except engines that run in clean environments like snow throwers or ice augers. On these
applications, a filter is not necessary and could collect snow or moisture and prevent proper engine operation. On most
applications, filtered air is necessary to assure abrasive particles are removed before entering the combustion chamber.
Dirt allowed into the engine will quickly wear the internal components and shorten the life of the engine.
Tecumseh engines use either a polyurethane or a paper type air filter system. A polyurethane pre-filter or a flocked
screen may be used in conjunction with the main filter. Extremely dirty operating conditions may require frequent filter
cleaning or replacement.
OPERATION
The outer cover holds the air filter element(s) and prevents debris from entering the filter box. The air supply is filtered
through the pre-filter if equipped, filter element (polyurethane or paper), and a flocked screen if equipped. Pre-filter
elements do not extend the recommended air filter service intervals listed under "Service". However; in extremely dirty
operating conditions a pre-filter element may increase the run time of the engine before the filter becomes restricted (not
to exceed the service recommendations), and service on the filter is necessary.
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