AIR INTAKE SYSTEMS
21
12. Slide the carburetor off of the carburetor studs.
NOTE: The choke linkage will come off with the
carburetor.
13. Unhook the spark plug wire from the clip in the
carburetor insulator. Slide the insulator off of the
carburetor studs.
See Figure 3.8.
14. Remove the carburetor insulator gasket and
clean the cylinder head sealing surface.
15. Reassemble by following the above steps in
reverse order.
NOTE: Tighten the carburetor nuts to a torque of
79.7 - 106.5 (9-12 Nm).
NOTE: Do not over tighten the carburetor nuts.
Doing so can cause the vent channel in the car
-
buretor insulator to collapse which will plug the
carburetor bowl vent. this can result in the
engine stalling or not running.
Figure 3.8
Unhook the
spark plug wire
Chore engines
Air filters
Generally air filters come in two different types, a
pleated-paper element or foam. A combination of the
two are used on the MTD engine. See Figure 3.9.
• Air filters used on the MTD engine are designed
to prevent particles larger than 3-5 micron from
passing through into the engine.
• The filter should be checked on a regular basis
possibly several times in a season.
NOTE: Never use compressed air on a paper air
filter. Compressed air will remove the tiny fibers
that are used to catch the dirt in the air. Without
these fibers the filter is useless.
NOTE: Refer to Chapter 1: Introduction for the
maintenance interval and cleaning instructions
for the air filter.
Figure 3.9
Paper-pleated element
Foam pre-filter
Both filters
together
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