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TUL: 5746 E Apache St. Tulsa, OK 74115
FXE: 2199 NW 53rd Street Fort Lauderdale, FL 33309

Part#: 149-24HT

149-24HT: Starter
24 Volt





Core: $200

This will also add the following products to your cart:

  • 149-24HT-CORE: Core Charge - 149-24HT

* Free domestic shipping on orders over $350.

As a Hartzell Aviation company, when you buy from QAA, you receive factory direct pricing!


Alternate Part Number(s): 31B22111

The original High-Torque is where it all started with Sky-Tec. Newly improved with internal, self-resetting Kickback Protection System! The HT-Series is now stronger and even more durable thanks to improved strontium fortified aluminum alloy and beefed-up mount castings, 2X steel ball bearing races, andNo Bendix – Electromechanical Solenoid. Also available in 24V Super Duty, Extended Cranking ( /EC models ). Perfect for helicopter, bush plane and workhorse operations requiring a rugged design, maximum reliability & service life.

Still one of the lightest Lycoming starters available at only 8.5 lbs. designed to spin the propeller twice as fast as most Heavyweight OEM starters, also has a High Efficiency Wound Field Motors and built-in starter solenoid for experimental aircraft applications (12V model only). Zero maintenance – no pins to replace in the event of a kickback. FAA-PMA approved for most Lycoming engines. Also available specifically configured to directly replace costly B&C starters on Robinson helicopters. Some airframe applications may require minor modification for best fit. Confirm aircraft fit, ring gear tooth count and voltage before ordering; comes with a standard 2-Year factory warranty.

 Part Number Lycoming
Voltage Pitch
 122-12HT  12 Volt
For 122 Tooth
Ring Gears
 122-24HT 24 Volt  10/12
For 122 Tooth 
Ring Gears 
 149-12HT 12 Volt   12/14
For 149 Tooth
Ring Gear
 149-24HT TIO-541-E1B4, O-540, IO-540,
TIO-540, HIO-360-B1A, 
HIO-360-A1A, HIO-360-D1A 
24 Volt   12/14
For 149 Tooth
Ring Gear
 149-12HT-H O-360, O-540  12 Volt  12/14
For 149 Tooth
Ring Gear
 149-24HT-H 24 Volt  12/14
For 149 Tooth
Ring Gear


The 149-24HT starter is an Aircraft Starter meant for Lycoming engines. This Aircraft Starter has some key features that differentiate it from other Aircraft Starters:

  • Weight: 8.9 lbs
  • Voltage: 24V
  • RPM: ~120-280 RPM at 22V
  • Gear Reduction: 4.3:1
  • Motor: Wound Field

Engine Applications

See the application information from Sky-Tec.

Sky-Tec Flyweight Starters & Solenoids Aircraft Fit Guide:

Engine Model:

Lycoming O-540-A2B, TIO-540, TIO-541-E1A4, TIO-541-E1C4, TIO-541-E1B4, O-540, IO-540, TIO-540, HIO-360-B1A, HIO-360-A1A, HIO-360-D1A


12/14 (for 149 Tooth Ring gears)

See Fit Guide in resource section for more information


Q: What are the dimensions of the 149-NL Sky-Tec Aircraft Starter?

A: The aircraft starter dimensions can be found in the installation instructions. Here is a link to that information:

Q: What does the HT stand for on my Sky-Tec Aircraft Starter?

A: HT stands for High-Torque Aircraft Starter. These are ideally suited for piston helicopters and workhorse operations according to Sky-Tec.

Q: Is my Sky-Tec Aircraft Starter spinning too fast?

A: The short answer is no your Sky-Tec Aircraft Starter can’t outrun your engine. Here is a link to a more thorough explanation from Sky-Tec on their Aircraft Starters:

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