ST400 Series Turbine Air Starters
Call us now at 1-800-353-4676 with your engine specs and requirements and we'll find the BEST starter for you!
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ST400IC01R85 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,346.54The Ingersoll Rand ST400IC01R85 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400IC01R85Or call 1-800-353-4676
Price: $3,346.54 -
ST400IC01R77 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400IC01R77 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400IC01R77Or call 1-800-353-4676
Price: $3,385.91 -
ST400IC01R31 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400IC01R31 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400IC01R31Or call 1-800-353-4676
Price: $3,385.91 -
ST400IC01R29 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,366.24The Ingersoll Rand ST400IC01R29 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400IC01R29Or call 1-800-353-4676
Price: $3,366.24 -
ST400IC01R15 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400IC01R15 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400IC01R15Or call 1-800-353-4676
Price: $3,385.91 -
ST400IC01L32 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400IC01L32 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400IC01L32Or call 1-800-353-4676
Price: $3,385.91 -
ST400EC03L94 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91Genuine Ingersoll Rand ST400EC03L94 Air Starter.STARTER ASSYMost popular starter brand on the marketSimple, rugged, and reliableModular designEasy field serviceabilityLightweightLube-FreeEfficient,...Model Number ST400EC03L94Or call 1-800-353-4676
Price: $3,385.91 -
ST400C06R31 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91Genuine Ingersoll Rand ST400C06R31 Air Starter.Most popular starter brand on the marketSimple, rugged, and reliableModular designEasy field serviceabilityLightweightLube-FreeEfficient, providing more...Model Number ST400C06R31Or call 1-800-353-4676
Price: $3,385.91 -
ST400C03R85 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,287.49The Ingersoll Rand ST400C03R85 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03R85Or call 1-800-353-4676
Price: $3,287.49 -
ST400C03R83 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400C03R83 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03R83Or call 1-800-353-4676
Price: $3,385.91 -
ST400C03R77 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400C03R77 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03R77Or call 1-800-353-4676
Price: $3,385.91 -
ST400C03R31 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,405.61The Ingersoll Rand ST400C03R31 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03R31Or call 1-800-353-4676
Price: $3,405.61 -
ST400C03R29 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,346.54The Ingersoll Rand ST400C03R29 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03R29Or call 1-800-353-4676
Price: $3,346.54 -
ST400C03R15 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400C03R15 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03R15Or call 1-800-353-4676
Price: $3,385.91 -
ST400C03L94 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,346.54The Ingersoll Rand ST400C03L94 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03L94Or call 1-800-353-4676
Price: $3,346.54 -
ST400C03L92 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400C03L92 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03L92Or call 1-800-353-4676
Price: $3,385.91 -
ST400C03L32 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,346.54The Ingersoll Rand ST400C03L32 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03L32Or call 1-800-353-4676
Price: $3,346.54 -
ST400C03L30 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400C03L30 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C03L30Or call 1-800-353-4676
Price: $3,385.91 -
ST400C01R85 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,385.91The Ingersoll Rand ST400C01R85 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C01R85Or call 1-800-353-4676
Price: $3,385.91 -
ST400C01R77 Turbine Air Starter | 40% Arc (90-150 PSI) | by Ingersoll Rand
Ingersoll Rand
Price: $3,366.24The Ingersoll Rand ST400C01R77 is a genuine IR ST400-series turbine air starter for 90 to 150 psi air supplies. It delivers up to 25 hp and 150 ft-lb of breakaway torque at 150 psi. It mounts on an...Model Number ST400C01R77Or call 1-800-353-4676
Price: $3,366.24
Selection & sizing guide
Choosing and Sizing the Ingersoll Rand ST400 series
The ST400 is Ingersoll Rand's compact lube-free turbine starter for diesel engines of 5 to 60 liters. It comes in three arcs for three supply pressures: ST400 (44% arc, 150 psi, 25 hp), ST455 (55% arc, 120 psi, 23 hp) and ST499 (99% arc, 90 psi, 26 hp). It runs on compressed air only.
ST400 series at a Glance
- Type
- Turbine, lube-free motor
- Models
- ST400, ST455, ST499
- Max power
- 23 to 26 hp
- Max supply pressure
- 150 psi / 120 psi / 90 psi
- Diesel engines
- 5 to 60 L
- Carbureted gas engines
- about double the diesel range (IR rule)
- Engagement
- Pre-engaged
- Natural gas operation
- No, air only
- Air inlet
- 1" NPT
- Extended cranking (>10 s)
- Yes
How to Size a ST400 Starter
| Model | Diesel, 4-stroke | Diesel, 2-stroke (x1.5) | Carbureted gas |
|---|---|---|---|
| ST400 | 5–60 L (305–3,661 cu in) | 8–90 L | 10–120 L (x2 rule) |
| ST455 | 5–60 L (305–3,661 cu in) | 8–90 L | 10–120 L (x2 rule) |
| ST499 | 5–60 L (305–3,661 cu in) | 8–90 L | 10–120 L (x2 rule) |
- Engine size and cycle. Find the displacement in liters (cu in ÷ 61.02). Ingersoll Rand's ranges are for 4-stroke diesels; for 2-stroke diesels multiply the range by 1.5, and for carbureted (spark-ignited gas) engines double it.
- Hard starts. IR's own rule: "For difficult-to-start engines or for operation under adverse conditions, use the next more powerful starter." Think cold climates, heavy driven loads, high compression or long idle periods.
- Supply pressure. Use a part-arc model for supplies up to 150 psi and the full-arc ("99") model for low-pressure supplies of 90 psi or less. Check the performance table at your pressure, not just the maximum.
- Air or gas. If the starter will run on natural gas, choose a gas-sealed version and pipe the exhaust away.
- Engagement. Pre-engaged: the drive pinion is completely engaged with the engine ring gear before the starter begins to crank the engine. Inertia: the rotating drive pinion engages the engine ring gear simultaneously with the initial cranking of the engine.
- Mounting. Match the flange, pinion (teeth, pitch, pressure angle) and rotation to the engine, or simply read them off the old starter's nameplate.
Air receiver, rough estimate. At 150 psi the ST400 uses 750 scfm at maximum power, about 12.5 scf of free air per second of cranking. Three 5-second start attempts need about 188 scf. A receiver charged to 150 psi and allowed to fall to 90 psi releases about 4.1 scf per cubic foot of volume, so it would need roughly 46 cu ft (344 US gal). This errs on the large side because the starter uses less air as the pressure falls. Run your own numbers in the sizing calculator.
Not sure of your engine's size or cycle? Look it up in the Model Finder or read the full air starter sizing guide.
Engines That Use the ST400
Our Air Starter Model Finder, built from Ingersoll Rand application data, recommends the ST400 for 41 engine models from 16 makers. The middle half of them run from 10 L to 26 L, and 2 are gas engines. Makers with the most matches: MWM (9), Mitsubishi (7), Jenbacher (4), MTU (4), Waukesha (3), International Harvester (2).
| Engine | Displacement | Fuel | Recommended starter |
|---|---|---|---|
| International Harvester 6.9L | 6.9 L (421 cu in) | diesel | ST400C03R15 |
| MWM TD232-V6 | 8.8 L (538 cu in) | – | ST400C01R77 |
| MWM 234 | 11 L (659 cu in) | – | ST400C01R77 |
| MWM TD232V8 | 12 L (720 cu in) | – | ST400C01R77 |
| Mitsubishi S6B3 | 15 L (891 cu in) | diesel | ST455C26R87 |
| Volvo Penta TAMD163 | 16 L (983 cu in) | diesel | ST400C03R29 |
| Mitsubishi S6A3 | 19 L (1,133 cu in) | diesel | ST455C26R87 |
| Mitsubishi S6R2 | 25 L (1,496 cu in) | diesel | ST455C26R87 |
| Jenbacher J312GS | 29 L (1,782 cu in) | – | ST400C03R83 |
| Jenbacher J316GS | 39 L (2,374 cu in) | – | ST400C03R83 |
| Mitsubishi S12R | 49 L (2,992 cu in) | diesel | ST455C26R493 |
| Jenbacher J612GS | 75 L (4,571 cu in) | – | ST455C03R83 |
Performance by Supply Pressure
Ingersoll Rand's figures at each supply pressure. Breakaway torque is what turns a stationary engine over; power and flow are at the speed of maximum power.
| Supply pressure | Breakaway torque | Speed at max power | Max power | Air flow at max power |
|---|---|---|---|---|
| 90 psi (6.2 bar) | 90 ft-lb (122 N·m) | 1,500 rpm | 14 hp (10 kW) | 430 scfm (203 L/s) |
| 120 psi (8.3 bar) | 120 ft-lb (163 N·m) | 1,650 rpm | 19 hp (14 kW) | 600 scfm (283 L/s) |
| 150 psi (10.3 bar) | 150 ft-lb (203 N·m) | 1,650 rpm | 25 hp (19 kW) | 750 scfm (354 L/s) |
| Supply pressure | Breakaway torque | Speed at max power | Max power | Air flow at max power |
|---|---|---|---|---|
| 60 psi (4.1 bar) | 80 ft-lb (108 N·m) | 1,400 rpm | 10 hp (7.5 kW) | – |
| 90 psi (6.2 bar) | 135 ft-lb (183 N·m) | 1,450 rpm | 18 hp (13 kW) | 650 scfm (307 L/s) |
| 120 psi (8.3 bar) | 185 ft-lb (251 N·m) | 1,500 rpm | 23 hp (17 kW) | 780 scfm (368 L/s) |
| Supply pressure | Breakaway torque | Speed at max power | Max power | Air flow at max power |
|---|---|---|---|---|
| 30 psi (2.1 bar) | 50 ft-lb (68 N·m) | 1,550 rpm | 7 hp (5.2 kW) | 320 scfm (151 L/s) |
| 60 psi (4.1 bar) | 115 ft-lb (156 N·m) | 1,600 rpm | 14 hp (10 kW) | 550 scfm (260 L/s) |
| 90 psi (6.2 bar) | 185 ft-lb (251 N·m) | 1,650 rpm | 26 hp (19 kW) | 765 scfm (361 L/s) |
Model Number, Flange and Pinion
Reading the model number
ST400IC03R31-030
| Code | Meaning |
|---|---|
ST400 | Model: ST400 = 44% arc, ST455 = 55% arc (120 psi), ST499 = 99% arc (90 psi) |
I | 1" NPT inlet (no letter = SAE split-flange inlet) |
C | Gear ratio |
03 | Flange: 00 = cradle mount, 01 = SAE No. 1, 03 = SAE No. 3 |
R | Rotation |
31 | Pinion code |
-030 | Orientation |
Pinion codes
Pinion codes are not universal: the same code can mean a different pinion in another family. This table is Ingersoll Rand's for the ST400.
| Pinion code | Rotation | Teeth | Pitch | Pressure angle |
|---|---|---|---|---|
15 | Right | 10 | 8/10 DP | 20° |
21 | Right | 11 | 8/10 DP | – |
29 | Right | 12 | 8/10 DP | – |
31 | Right | 12 | 6/8 DP | – |
32 | Left | 12 | 6/8 DP | – |
77 | Right | 9 | 3 module | 15° |
85 | Right | 11 | 3 module | 15° |
Installation and Air Supply
Starters are only as good as the air behind them. Keep the receiver drained, fit the strainer close to the inlet, and size the supply line at least as large as the starter's inlet. Turbine starters need no lubricator. See valves, strainers and accessories.
Ingersoll Rand Documents
- ST400 user manual (P7061) (summary page · PDF)
- Ingersoll Rand Engine Starting Systems catalog (summary page · PDF)
Frequently Asked Questions
ST400, ST455 or ST499: which one?
Pick by the pressure you have at the starter: ST400 for up to 150 psi, ST455 for up to 120 psi, ST499 for low-pressure systems up to 90 psi. The full-arc ST499 makes its 26 hp at only 90 psi.
Can the ST400 run on natural gas?
No. Ingersoll Rand lists the ST400 series as not gas sealed. For gas operation in this size range look at the ST500 or ST150.
What does the "I" in ST400IC03R31 mean?
A 1" NPT threaded inlet. Without the I, the starter takes an SAE J518 split-flange inlet.
How do I know which ST400 model fits my engine?
Read the model number off your current starter's nameplate and we can match it, including superseded numbers. Otherwise send the engine make, model and air pressure, or look the engine up in the Model Finder.
Want us to confirm the size? Send your engine make, model and air supply pressure and an Ingersoll Rand specialist will match the starter, flange and pinion.
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