Technical data

13773-001
71-00
Page 6 30 Nov 2000
Low Fuel Pressure Incorrect fuel pump adjustment. Check and adjust in accordance
with IO-550 Maintenance Manual
Chapter 22, “Fuel System Adjust-
ment.” (Refer to Model IO-550
Maintenance Manual)
Malfunctioning fuel pump relief
valve.
Replace fuel pump.
High Fuel Pressure Malfunctioning relief valve opera-
tion in fuel pump.
Replace fuel pump.
Restricted recirculation passage in
fuel pump.
Replace fuel pump.
Incorrect fuel pump adjustment. Check and adjust in accordance
with IO-550 Maintenance Manual
Chapter 22, “Fuel System Adjust-
ment.” (Refer to Model IO-550
Maintenance Manual)
Fluctuating Fuel Pressure Vapor in fuel system, excessive
fuel temperature.
Normally, operating the auxiliary
pump will clear system. Operate
boost pump in accordance with
the Pilot’s Operating Handbook
(POH). (List of Publications)
Engine Has Poor Acceleration Idle mixture too lean. (Check RPM Rise, Idle Cutoff).,
Adjust idle mixture in accordance
with IO-550 Maintenance Manual
Chapter 22, “Fuel System Adjust-
ment”. (Refer to Model IO-550
Maintenance Manual)
Incorrect fuel/air mixture, worn
control linkage, or restricted air
cleaner.
Replace worn elements of linkage.
Service air filter in accordance
with AMM. (Refer to 71-60]
Malfunctioning ignition system. Check ignition cables and connec-
tions. Replace malfunctioning
spark plugs. (Refer to 74-00)
TROUBLE PROBABLE CAUSE REMEDY