Standard Practice Maintenance Manual 6-3
30 Sep 2016 CHANGE 2
Engine Inspection and Service
• Overhauled or repaired in a manner that is inconsistent with the specifications,
limits, and instructions provided in the CM Instructions for Continued
Airworthiness and FAA Airworthiness Directives
6. The “Hobbs Meter” is commonly used by the aviation industry as an acceptable
device to record time elapsed while electrical power is applied to the device. The
conditions under which the Hobbs Meter records operation vary widely within the
aviation industry. Continental Motors does not specify a method to record engine
operating hours, rather, Continental Motors defers to the end application installer.
NOTE: TBO periods specified in this document are only estimates and do
not reflect warranty periods. For engine warranty coverage, refer to the
original Aircraft Engine Warranty received with the engine.
Table 6-1. Engine Time Between Overhaul (TBO)
ENGINE MODEL SEE NOTE
HOURS/YEARS
ENGINE
S/N BEFORE
1006000
ENGINE
S/N 1006000
AND LATER
A65, A75 and C75, C85, C90 Series
1
1800/12
O-200-A, B
1, 2
1800/12 2000/12
O-200-D
1
2000/12 2200/12
IO-240-A, B
1, 2
IOF-240-B
1, 2
IO-346-A
1
1500/12
C125, C145 Series and O-300-A, B, C, D
1
1800/12
GO-300-A, C, D, E
1
1200/12
IO-360-A, AB, B, C, D, G, H, J, K
1
1500/12
IO-360-CB, DB, GB, HB, JB
1, 2
1500/12 1700/12
IO-360-AF, ES, KB
1, 2
2000/12 2200/12
TSIO-360-A, AB, B, C, D, E, F, H
1
1400/12
LTSIO-360-E
1
TSIO-360-CB, DB, HB, JB
1, 2
1400/12 1600/12
L/TSIO-360-EB, FB, GB, KB, LB, MB, RB, SB
1, 2
1800/12 2000/12
E165, E185, E225 Series
1
1500/12
O-470-A, B, E, G, N, P
1
O-470-J, K, L, M, R, S
1, 2
1500/12 1700/12
O-470-U
1, 2, 3
2000/12 2200/12
IO-470-C, D, E, F, G, H, J, K, L, M, N, P, R, S, U, V, VO
1, 2
1500/12 1700/12
TSIO-470-B, C, D
1
1400/12
IO-520-B, BA, C, M
1
1700/12
IO-520-A, BB, CB, D, E, F, J, K, L, MB
1, 2
1700/12 1900/12
L/IO-520-P
1, 2
2000/12 2200/12
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