Technical data

13773-001
73-00
Page 2 30 Nov 2000
2. TROUBLESHOOTING
Trouble Probable Cause Remedy
Engine Will Not Start And No Fuel
Flow Indication
No fuel to engine. Check fuel tank level.
Mixture control improperly rigged. Check mixture control for proper
rigging. (Refer to TCM Model IO-
550 Overhaul Manual)
Engine not primed. Auxiliary pump switch to BOOST
position.
Selector valve in OFF position. Position selector valve to ON posi-
tion.
Engine Will Not Start With Fuel
Flow Indication
Engine flooded. Turn off boost pump and ignition
switch. Advance throttle to full
OPEN, retard mixture to full LEAN,
and crank engine to clear cylin-
ders of excess fuel. Repeat start-
ing procedure.
No fuel to engine. Loosen one line at cylinder nozzle.
If no fuel flow shows on gage,
replace fuel metering valve.
Rough Idle Nozzle restricted. Remove nozzles and clean. (Refer
to TCM Model IO-550 Overhaul
Manual)
Improper idle mixture. Adjust fuel-air mixture. (Refer to
TCM Model IO-550 Overhaul Man-
ual)
Poor Acceleration Idle mixture incorrect. Adjust fuel-air mixture. (Refer to
TCM Model IO-550 Overhaul Man-
ual)
Unmetered fuel pressure too high. Lower unmetered fuel pressure.
(Refer to TCM Service Bulletin
SID97-3)
Worn linkage. Replace worn component of link-
age.
Engine Runs Rough Restricted nozzle. Remove and clean all nozzles.
(Refer to TCM Model IO-550 Over-
haul Manual)
Improper mixture. Improper pump pressure, replace
pump. (Refer to TCM Service Bul-
letin SID97-3)