Table of Contents
Advertisement
Problem
Engine will not start
or starts with
difficulty (Cont.)
12-30
Page 74
Table 1 (Cont.)
Fault Isolation Guide
Cause
No fuel flow
Blockage in fuel hose
Water in fuel system
Throttle valve open too far
Flooded engine
(overpriming)
Faulty ignition wire
Incorrect crankshaft-to-
camshaft timing
Faulty spark plug
Faulty harness
Cylinder compression
problem
YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Corrective Action
1. Disconnect the fuel hose.
2. Complete the check of the fuel
flow.
3. Examine for evidence of leaks
and correct as required.
4. Clean the filters, strainers, lines,
or fuel valves.
Drain the fuel hoses.
Set throttle control approximately
1/4 inch open for about 800 rpm.
1. Turn ignition switch "on" and
put the mixture control in IDLE
CUT-OFF.
2. Fully open throttle and start the
engine.
3. If the engine does not start in 5
seconds, shut down and do not
try to start until the starter cools
down.
4. When the engine starts, decrease
throttle and advance the mixture
control slowly to FULL RICH.
1. Examine the ignition harness for
breaks and cracks.
2. Replace faulty wires.
Make sure that the crankshaft-to-
camshaft timing is correct
1. Remove the spark plugs.
2. Examine, clean, gap, test, and
replace as necessary.
Remove and replace the harness as
necessary.
1. Complete the cylinder
compression check.
2. Complete the borescope
inspection of low cylinder(s) to
determine if further disassembly
and repairs are necessary.
© 2021 Avco Corporation. All Rights Reserved
Ref.
OHM
OHM
74-20
72-30
February 2021
Advertisement
Table of Contents
