Piper Aircraft Corporation PA-28-161 CADET, Руководство по обслуживанию, Страница: 231 / 422

Figure 8-6. Carburetor
b. Check all fuel lines for tightness and evidence of leakage.
c. Check throttle and mixture control rods and levers for travel, tightness and safety.
d. Clean the fuel inlet screen. (Refer to Figure 8-6.)
e. Remove the plug at the aft position of the carburetor and drain any accumulation of foreign matter.
f. Check carburetor air box for wear and full travel of heat door.
g. Check the adjustment of the idle mixture and idle speed. (Refer to Paragraphs 8-18 and 8-19.)
8-19. ADJUSTMENT OF IDLE MIXTURE. (Refer to Figure 8-6.)
a. After performing the standard engine starting procedure, operate the engine for at least two minutes
between 800 to 1200 RPM to insure proper engine warmup.
—WARNING—
When performing engine warm-up indoors, provide a barrier about the
engine to prevent serious injury. Also provide adequate means of
ventilating the work area.
b. Draw back on the cockpit throttle control lever to obtain a reading of approximately 550 RPM on the
tachometer.
c. Turn the idle mixture adjusting screw (1) located near the rear of the carburetor, clockwise, leaning the fuel
mixture. Continue to do this until the engine begins to run roughly, at which time the engine speed will decrease.
d. Turn the screw counterclockwise until the engine runs smoothly again. Continue to turn the screw in the
same direction until the engine begins to run roughly once more. At this point, the fuel mixture will be too rich
and engine speed will decrease again.
e. Now advance the screw to a midway position between the lean and rich fuel mixture: the RPM of the
engine will reach a minimum speed for idle mixture settings.
1. IDLE MIXTURE ADJUSTMENT
2. MIXTURE CONTROL ARM
3. BOWL DRAIN
4. FUEL INLET SCREEN
5. THROTTLE ARM
6. IDLE ADJUSTMENT
7. ARM SET SCREW (TORQUE 20-25
IN LBS AND SAFETY)
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PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
POWER PLANT
1J15