Exhaust System; Carburetor And Priming System; Cooling System - Cessna TR182 1979 Pilot Operating Handbook

CESSNA
MODEL TR182
SECTION 7
AIRPLANE & SYSTEMS DESCRIPTIONS
EXHAUST SYSTEM
Exhaust gas from the center and rear cylinders on the right side of the
engine passes through risers, a muffler, and a crossover tube; gas from the
front cylinder passes through a riser directly into the crossover tube. The
gas flows through the crossover tube into an exhaust manifold on the left
side of the engine; the exhaust manifold is also connected to the exhaust
risers on the left side of the engine. The exhaust manifold discharges the
gas into the turbine section of the turbocharger. After leaving the turbine,
the exhaust gas is vented overboard through a tailpipe. A waste gate,
incorporated into the exhaust manifold, controls the volume of gas flow
through the turbine by venting excess gas to the tailpipe through a bypass.
The muffler, on the right side of the engine, is covered by a shroud which
forms a heating chamber for cabin heat and windshield defrost air.
CARBURETOR AND PRIMING SYSTEM
The engine is equipped with a horizontally-mounted, up-draft, float-
type, fixed jet carburetor mounted below the engine adjacent to the
firewall. The carburetor is equipped with an idle cut-off mechanism, and a
manual mixture control. Fuel is delivered from the fuel system to the
carburetor by gravity flow, the engine-driven fuel pump, and! or auxiliary
fuel pump. In the carburetor, fuel is atomized, proportionally mixed with
compressed air, and delivered to the cylinders through intake manifold
tubes. The proportion of atomized fuel to air may be controlled, within
limits, by the mixture control located on the lower center portion of the
instrument panel.
For easy starting in cold weather, the engine is equipped with a
manual primer. The primer is actually a small pump which draws fuel
from the fuel strainer when the plunger knob is pulled out, and injects it
into the engine intake ports when the knob is pushed back in. The plunger
is equipped with a lock and, after being pushed full in, must be rotated
either left or right until the knob cannot be pulled out.
COOLING SYSTEM
Ram air for engine cooling enters through two intake openings in the
front of the engine cowling. The cooling air is directed through the remote
oil cooler (behind the left intake opening), and around the cylinders and
other areas of the engine by baffling, and is then exhausted through cowl
flaps on the lower aft edge of the cowling. The cowl flaps are mechanically
operated from the cabin by means of a cowl flap lever on the right side of
the control pedestal. The pedestal is labeled OPEN, COWL FLAPS,
CLOSED. Before starting the engine, and throughout takeoff and high
power operation, the cowl flap lever should be placed in the OPEN position
for maximum cooling. This is accomplished by moving the lever to the
1 October 1978 7-23