THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 1
Jun 1/03
5D23
77-10-00
POWER
1. Manifold Pressure Gauge
A. Description
The manifold pressure gauge is a vapor proof, absolute pressure type instrument. Pressure from
the intake manifold of the engine is transmitted to the instrument through a line. A pointer indicates
the manifold pressure available at the engine in inches of mercury.
B. Troubleshooting
See Chart 1.
CHART 1
TROUBLESHOOTING MANIFOLD PRESSURE GAUGE
Trouble Cause Remedy
Excessive error at existing Pointer shifted. Replace instrument.
barometric pressure.
Excessive error when engine Line leaking. Tighten line connections.
is running.
Sluggish or jerky pointer Defective instrument. Replace instrument.
movement.
Dull or discolored marking. Age. Replace instrument.
Incorrect reading. Moisture or oil in line. Disconnect lines and blow
out.
2. Tachometer Indicator
The tachometer is electric and provides an indication of crankshaft speed in revolutions per minute. It
receives its information from a magnetic sensor mounted on the left magneto.
3. Engine Oil Pressure Gauge
See 79-30-00.
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