Operating instructions

JANUARY 1985 8-17
b. Turn magneto switch to "BOTH" position.
c. Press boost pump button and hold it until 2.5-3.0
psi nozzle pressure is obtained; then release boost
pump button and press starter button.
NOTE
During operation of the starter, the boost
pump may be used intermittently to
maintain 2.5 to 3.0 psi nozzle pressure.
DO NOT use boost pump after engine is
running smoothly.
8-48. PRESERVATION. If the engine is not to be
installed in an aircraft and placed in service
immediately, an additional period of 15 minutes test
time will be required to preserve the engine internally.
The engine must be stopped so the oil may be drained
and replaced with a corrosion preventive oil mixture
(suitable for flight operation). Refer to Service
Bulletin M84-10.
TABLE XVI. TEST OPERATING LIMITS
FEATURE IO-520-A IO-520-B,
BA & C
IO-520-D,
F, K & L
IO-520-J IO-520-E
Maximum takeoff power
Maximum continuous power
Full throttle speed (RPM)
Idling speed (RPM)
Fuel grade (Octane)
Fuel consumption at full throttle (Lbs./Hr.
Fuel pump pressure at full throttle (psi)
Fuel pump pressure at idle (psi)
Metered fuel pressure at full throttle (psi)
Metered fuel pressure at idle (psi)
Engine intake air temperature
Engine intake air pressure (Max.) (In. H2O)
Manifold pressure at full throttle (In. Hg)
Manifold pressure at idle (I n. Hg)
Oil Grade Above 40° F.
Below 40° F.
Oil consumption at max. continuous
power (Lbs./Hr.)
Oil temperature (desired range)
Oil temperature (Max.)
Oil pressure at full throttle (psi max.)
(oil temperature 175-185°F.)
Oil pressure at idle (psi min.)
(oil temperature 140-150°F.)
Ignition timing Left Magneto (BTC)
(±1°) Right Magneto (BTC)
Magneto drop at 2100 RPM (Max.) (RPM)
Magneto Spread
Cylinder head temperature (Max.) with
bayonet thermocouple
*Crankcase pressure (Max.) (In. H2O)
285 @ 2700
285 @ 2700
2700-2750
575-625
100LL/100
139/147
29.2-30.8
9.0-11.0
16.5-17.5
3.5-4.0
Ambient
1.0
28.75
18.5 Max.
SAE 50
SAE 30 or
10W30
3
150-200° F.
240°F.
30-60
10
22°
22°
150
50
460°F.
4.0
285 @ 2700
285 @ 2700
2700-2750
575-625
100LL/100
139/147
28.0-31.0
9.0-11.0
15.6-16.5
2.0-2.5
Ambient
1.0
28.75
18.5 Max.
SAE 50
SAE 30 or
10W30
3
150-200° F.
240°F.
30-60
10
22°
22°
150
50
460°F.
4.0
300 @ 2700
285 @ 2700
2850-2900
575-625
100LL/100
143/153
29.0-32.5
9.0-11.0
17.5-18.7
3.5-4.0
Ambient
1.0
28.75
18.5 Max.
SAE 50
SAE 30 or
10W30
3
150-200° F.
240°F.
30-60
10
22°
22°
150
50
460°F.
4.0
285 @ 2700
285 @ 2700
2700-2750
575-625
100LL/100
139/147
29.2-30.8
9.0-11.0
16.5-17.5
3.5-4.0
Ambient
1.0
28.75
18.5 Max.
SAE 50
SAE 30 or
10W30
3
150-200° F.
240°F.
30-60
10
22°
22°
150
50
460°F.
4.0
300 @ 2700
285 @ 2700
2850-2900
575-625
100LL/100
143/153
29.0-32.5
9.0-11.0
17.5-18.7
3.5-4.0
Ambient
1.0
28.75
18.5 Max.
SAE 50
SAE 30 or
10W30
3
150-200° F.
240°F.
30-60
10
22°
22°
150
50
460°F.
4.0