Lycoming IO-390-D Series User Manual

© 2020 Avco Corporation. All Rights Reserved Appendix A
March 2020 Page 51
IO-390-D Series Engine Installation and Operation Manual
APPENDIX A
ENGINE SPECIFICATIONS AND OPERATING LIMITS
Table A-1
IO-390-D Series Engine Specifications
Number of Cylinders
4
Cylinder Arrangement - Firing Order
1-3-2-4
Spark Plugs
8
Ignition timing advance
20º BTC - Variable
Maximum Continuous Horsepower
215 HP @ 2700 rpm & 0.47
Performance Cruise (75% Rated)
161 @ 2450 rpm
Economy Cruise (65% Rated)
140 @ 2350 rpm
Fuel Consumption, Cruise 75% rated power
65% rated power
13.1 gph
10.0 gph
Propeller Drive Ratio
1:1
Propeller Shaft Rotation
Clockwise
Counterweight Order
One 6.3 order and one 8th order
pendulum-type counterweight
Bore
5.319 in.
13.510 cm
Stroke
4.375 in.
11.1 cm
Piston Displacement
389 in.
3
6 374.6 cm
3
Compression Ratio
8.9:1
Weight (lb)
D1A6 and D3A6
288 lb.
130.6 kg
D1B6 and D3B6
285 lb.
129.3 kg
Dimensions
D1A6 and D3A6
Height 20.96 in.
53.24 cm
Width 34.37 in.
87.30 cm
Length 32.56 in.
82.70 cm
Dimensions
D1B6 and D3B6
Height 22.52 in.
57.20 cm
Width 34.37 in.
87.30 cm
Length 29.08 in.
73.86 cm
Oil Sump Capacity
7 quarts
6.6 liters
Minimum quantity of oil in flight
3.5 quarts
3.3 liters
Oil Grade Specification
NOTICE: During the first 50 hours of engine operation
of a new, rebuilt, or overhauled engine, it is
recommended that this engine be operated
with mineral oil until oil consumption has
stabilized.
SAE J1966 or
MIL-L-6082B
SAE Grades
SAE J1899 or
MIL-L-22851
Ashless Dispersant
SAE Grades
Oil Grade at All Temperatures
------
15W-50 or 20W-50
Oil Grade at Temperatures above 80°F (27°C)
60
60
Oil Grade at Temperatures above 60°F (16°C)
50
40 or 50

Lycoming IO-390-D Series Specifications

General

Brand	Lycoming
Model	IO-390-D Series
Category	Engine
Language	English