Cessna 150K - Induction Air System; Ignition System; No. 1 Magneto Outlet

NOTE
After each adjustment to the idle mixture, run
engine up to approximately 2000 rpm to clear
engine of excess fuel to obtain a correct idle
speed.
11-38. INDUCTION AIR SYSTEM.
11-39. Ram air to the engine enters the induction
air box through an opening in the forward part of the
lower engine cowling nose cap. The air is filtered
through a filter which is located at the opening in
the nose cap. From the induction airbox the filtered
air is directed to the inlet of the carburetor, mounted
on the lower side of the engine, and through the car-
buretor, where fuel is mixed with the air, to the in-
take manifold. From the intake manifold, the fuel-
air mixture is distributed to each cylinder by separ-
ate intake pipes. The intake pipes are attached to
the intake manifold with hose and clamps and to the
cylinder with a two bolt flange which is sealed with a
gasket. The induction airbox contains a valve,
operated by the carburetor heat control in the cabin,
which permits air from an exhaust heated source to
be
selected in the event carburetor icing or filter
icing should be encountered.
11-40. REMOVAL AND INSTALLATION.
a. Remove airbox and carburetor as outlined in
paragraph 11-36.
A
t
VIEW
LOOKING
FORWARD
NO.1
OUTLET
A
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b. Remove intake pipes by disconnecting hose and
remOVing nuts and washers attaching pipes to cyl-
inders.
c. Installation of the system is the reverse of the
preceding steps. Use new gaskets at installation.
11-41. IGNITION SYSTEM.
11-42. Sealed, lightweight Slick magnetos are used
on the engine. Both magnetos are equipped with im-
pulse couplings. The magnetos MUST NOT BE
DISASSEMBLED.
Internal timing is fixed and the
breaker pOints are not adjustable. Timing marks
are provided on the distributor gear and distributor
block, visible through the air vent holes, for timing
to the engine. A timing hole is provided in the bot-
tom of the magneto adjacent to the magneto flange.
A timing pin (or 0.093 inch 6-penny nail) can be
inserted through this timing hole into the mating hole
in the magneto rotor shaft to lock the magneto ap-
proximately in the proper firing position. Slick
lightweight ignition harness is used with the light-
weight magnetos. For ignition harness repair refer
to the manufacturer's Service Manual.
IWARNING'
During all magneto maintenance, always take
proper precautions to make sure the engine
can not fire or start when the propeller is
moved.
TIMING MARK
VIEW
A-A
MODEL NO. 4001 SLICK MAGNETO
Figure 11-6. No. 1 Magneto Outlet
11-18