AMD 601XL / 601XLI / 650LS / 650LSi SLSA MAINTENANCE MANUAL
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FUEL PRESSURE GAUGE
GENERAL
The fuel pressure gauge instrument is mounted in the cluster on the instrument panel.
This gauge is connected to the sender at the carburetor fuel inlet fitting.
TROUBLESHOOTING See following table:
FUEL PRESSURE GAUGE
Trouble
Cause
Remedy
No fuel pressure indication.
Fuel valve stuck.
No fuel in tanks.
Check valve.
Check fuel, fill.
Defective fuel pump.
Defective gauge/sender.
Check pump for pressure build
up. Check diaphragm and relief
valves in engine pump. Check
for obstruction in electric pump.
Replace gauge/sensor.
Pressure low or pressure surges.
Obstruction in inlet side of pump.
Faulty bypass valve.
Faulty diaphragm.
Trace lines and locate
obstruction.
Replace.
Replace or rebuild pump.
Needle fluctuation.
Surge dome on pump filled with
fuel.
Remove and empty.
Note that fuel pressure can read very low. See engine manual for minimum fuel pressure.
AMMETER - OPTIONAL
GENERAL
The ammeter is mounted in the instrument cluster located on the instrument panel. This
instrument measures the amount of current received and the amount of current drain on
the battery. When not working, change instrument and or check electric wires.
VOLTMETER
GENERAL
The Voltmeter is mounted in the instrument cluster located on the instrument panel. This
instrument measures the level of the battery or Alternator output. When not working,
change instrument and or check electric wires.
July 09
9.6