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YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Problem
Engine will not turn
static rpm or will not
develop rated rpm
(Cont.)
Engine will not supply
the rated power
© 2021 Avco Corporation. All Rights Reserved
February 2021
Table 1 (Cont.)
Fault Isolation Guide
Cause
Fouled spark plugs
Incorrect fuel flow
Blockage in air inlet or
manifold.
Incorrect type of fuel
Throttle lever is
incorrectly adjusted
Insufficient combustion
Incorrect crankshaft to
camshaft timing
NOTICE: This could
also cause the engine not
to start.
Blockage in manifold
system
Leak in intake or exhaust
Corrective Action
Remove and clean spark plugs
Look for blocked fuel filters.
1. Make sure that the air filters
are clean.
2. Examine the induction system
for breaks in the ducts. Breaks
can let foreign material or
heated air enter the induction
system.
3. Repair or replace air inlet or
manifold if necessary.
1. Replace fuel with correct fuel.
2. Also refer to "Incorrect Fuel
or Fuel Contamination" in
Chapter 05-50.
Adjust the throttle lever in
accordance with airframe
manufacturer's instructions.
1. Complete the cylinder
compression check.
2. Complete the borescope
inspection to look for
excessive wear on the
cylinders or damaged valve
and valve seats.
3. Complete the top overhaul.
Make sure that the crankshaft-to-
camshaft timing is correct.
Clear all ducting.
Tighten loose connections or
replace manifold gaskets as
necessary.
Ref.
OHM
IOM
Appendix
A
72-30
OHM
OHM
12-30
Page 79
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