Continental ST5 Starter, 24 Volt, FAA-PMA Approved, by Skytec
Skytec Starter Fit Guide (Important Information, see Pg 2)
ST5 series starters offer the following features:- Best starter for 520 & 550 engines
- Powerful 2.2 kW high-torque, permanent magnet motor
- Faster cranking RPM - typically 10-25% faster than heavyweight starters.
- Light weight (9.4 lbs!)
- Proven gear reduction drive train tempers current draw
- TCM starter adapter friendly electromechanically engaged/disengaged drive system provides instantaneous release of the starter adapter wrap spring virtually eliminating starter-induced adapter wear
- Approved and recommended for ALL starter adapters ("classic style", "improved style", "permold", "sand cast", etc.)
- A simple, easy-to-install, bolt-off/bolt-on, maintenance-free starter that fits the entire "large" series Continental engines (with right-angle starter adapters) from O-300-D through TSIO-550 engines
- Attractively designed and affordably produced making it the first and only choice in lightweight large Teledyne Continental engine starters.
| Sky-Tec C24ST3 | TCM 656181E24V "Iskra" Starter | Sky-Tec C24ST5 | |
| Weight | 6.5 lbs | 8.3 lbs | 8.3 lbs |
| Rated Power (kW) | 1.4 Kw | 2.5 Kw | 2.2 Kw |
| Tested Power @ 30 ft-lb (bHP) | 2.8 bHP | 2.2 bHP | 2.9 bHP |
| Tested Efficiency | 50% | 44% | 50% |
| Estimated Prop RPM | 70 | 60 | 80 |
| Static Resistance to Rotation | 1-2 ft-lbs | 8-10 ft-lbs | 1-2 ft-lbs |
| Starter Adapter Safety Mechanism | Centrifugal Clutch Safe for ALL TCM starter adapters! | None | Electromechanical Solenoid Safe for ALL TCM starter adapters! |
| Pros | Lightweight Efficient | None | Powerful, Steady, Even, High Torque |
How much weight can it save?
The heavyweight OEM starters in most IO520 and TSIO550's weigh more than 16+ lbs. The ST5 weighs 9.4 lbs. for a total weight savings of approximately nearly 7 lbs.How is the ST5 starter different?
The ST5 starter couples a high power 2.2 kW motor with an innovative solenoid-engaged (and disengaged) drive system completely disengages the powerful permanent magnet motor while the starter is unpowered eliminating possible TCM starter adapter wear while providing authoritative, high-RPM starting. Positive solenoid enabled engagement and disengagement allows the TCM starter adapter to fully unwrap under all normal operating conditions thus greatly prolonging starter adapter life.How do I know which one to buy?
If your TCM engine has a right-angle starter adapter at the rear of the engine and a clean source of nearly located battery voltage, chances are this starter is the right one for your application.| Sky-Tec C24ST3 | TCM 656181E24V "Iskra" Starter | Sky-Tec C24ST5 | |
| Weight | 6.5 lbs | 8.3 lbs | 8.3 lbs |
| Rated Power (kW) | 1.4 Kw | 2.5 Kw | 2.2 Kw |
| Tested Power @ 30 ft-lb (bHP) | 2.8 bHP | 2.2 bHP | 2.9 bHP |
| Tested Efficiency | 50% | 44% | 50% |
| Estimated Prop RPM | 70 | 60 | 80 |
| Static Resistance to Rotation | 1-2 ft-lbs | 8-10 ft-lbs | 1-2 ft-lbs |
| Starter Adapter Safety Mechanism | Centrifugal Clutch Safe for ALL TCM starter adapters! | None | Electromechanical Solenoid Safe for ALL TCM starter adapters! |
| Pros | Lightweight Efficient | None | Powerful, Steady, Even, High Torque |
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