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Problem
Engine will not supply
the rated power
(Cont.)
Engine smokes
excessively
NOTICE: An engine
regularly smokes if it
is idling for an
extended period.
Engine hesitates,
misses
Engine surges
12-30
Page 80
Table 1 (Cont.)
Fault Isolation Guide
Cause
Oil pressure too low
Breather is clogged
Valve sticking
Low engine oil level
Faulty governor
Incorrect propeller
governor
Breather is blocked
Faulty oil pump
Propeller blades are
intermittently sticking in
hub
Front main bearing has
too much clearance
YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Corrective Action
1. Tighten fittings.
2. Replace oil lines, or hoses.
3. Increase oil pressure as
necessary.
Make sure that nothing is
blocking the air flow.
Refer to "Valve Sticking"
Complete the check of the oil
level.
Leak test propeller governor.
Replace the propeller governor.
Make sure that the propeller
governor isthe correct part
number.
Examine the breather for
obstructions. Remove all
obstructions.
Repair or replace the oil.
Remove and overhaul the
propeller.
Complete the leak test. Refer to
the latest revision of Service
Instruction No. 1462.
© 2021 Avco Corporation. All Rights Reserved
Ref.
05-50
12-10
72-20
OHM
OHM
Propeller
manufactu
rer's
instructio
ns
OHM
February 2021
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