Ignition-Starter System; Air Induction System - Cessna TR182 1979 Pilot Operating Handbook

SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTIONS
CESSNA
MODEL TR182
minimize loss of oil through the breather, fill to seven quarts for normal
flights of less than three hours. For extended flight, fill to eight quarts
(dipstick indication only). For engine oil grade and specifications, refer to
Section 8 of this handbook.
An oil quick-drain valve is installed on the bottom of the oil sump, to
provide a quick, clean method of draining the engine oil. To drain the oil,
slip a hose over the end of the valve and push upward on the end of the valve
until it snaps into the open position. Spring clips will hold the valve open.
After draining, use a suitable tool to snap the valve into the extended
(closed) position and remove the drain hose.
IGNITION-STARTER SYSTEM
Engine ignition is provided by two engine-driven magnetos encased in
a single drive housing, and two spark plugs in each cylinder. The right
magneto fires the lower left and upper right spark plugs, and the left
magneto fires the lower right and upper left spark plugs. Normal opera-
tion is conducted with both magnetos due to the more complete burning of
the fuel-air mixture with dual ignition.
Ignition and starter operation is controlled by a rotary type switch
located on the left switch and control panel. The switch is labeled clock-
wise, OFF, R, L, BOTH, and START, The engine should be operated on both
magnetos (BOTH position) except for magneto checks. The Rand L
positions are for checking purposes and emergency use only. When the
switch is rotated to the spring-loaded START position (with the master
switch in the ON position), the starter contactor is energized and the
starter will crank the engine. When the switch is released, it will automati-
cally return to the BOTH position.
AIR INDUCTION SYSTEM
The engine air induction system receives ram air through a recessed
opening in the left engine cowl and directs it through an air filter which
removes dust and other foreign matter from the induction air. Airflow
enters a carburetor heat airbox, and is then ducted into the compressor side
of the turbocharger. After passing through the turbocharger, the com-
pressed air is ducted through the carburetor and induction manifold into
the engine cylinders. In the event carburetor ice is encountered or the
induction air filter becomes blocked, alternate heated air may be obtained
from a shroud which covers the exhaust manifold located on the left side of
the engine. The shroud receives unfiltered air from inside the engine
cowling. After the airflow passes through the shroud, it is ducted to a valve
in the airbox operated by a control knob labeled CARB HEAT, on the center
area of the switch and control panel. The control knob is equipped with a
push-button lock.
7-22
1 October 1978