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12 volt 24 volt
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FAA-PMA APPROVED for Certified Aircraft

Intermittent Duty, (Starter Solenoid). Available in 12V or 24V. Activation: +V to S-Terminal.
(Frame is grounded by mounting).


  • Silver contacts provide 300A in-rush capability. Much higher than the original units.
  • Strong spring and high-current coil for quick contact opening - minimizing arcing
  • Single coil terminal (other end connected to case).


  • FAA-PMA Certified - stop using automotive parts and operating in the 'gray area' (aka. non-conformance) of the FAR's!
  • Lamar High Quality Manufacturing designed to take the beating our piston aircraft dish out
  • Upgraded to perform best with today's lightweight, high torque starters
  • Not automotive store parts with extra mystery terminals
  • Same OE terminal layout used for decades on our aircraft - simple to install
  • Silver contacts (vs. copper) for high-current capability and long-life
  • All-metal case construction
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Installed in a 1966 PA28-140. Fit perfectly without any modifications and works as advertised

Rick S
September 22, 2020

I needed a relay. I bought this one. It works.

Dennis M
August 24, 2020

Shipped fast on time— fits— works — hope it lasts as long as original Bakelite solenoid— should order diode at same time : )

August 13, 2020

great service

Andrew G
July 27, 2020

Solenoid worked fine.

Paul Y
July 25, 2020

Service was great delivery was on time solenoids work great

Bobby G
July 24, 2020

great product, shipped fast

June 19, 2020

Shipping speed and pricing were pleasing. NOTE: the installation instructions, while accurate, were a bit ambiguous and could use being updated. I sent the manufacturer a specific suggestion for editing the instructions to make them more clear. E.g., parts of the instructions probably havent been changed in a looooong time. Theyre perfectly adequate for A&Ps with a lot of experience but an A&P without prior experience (i.e., fresh eyes) in these units might not be able to follow the instructions.

Hillel G
June 5, 2020

Flawless operation 700+ hrs FYI. A weak or defective battery can cause solenoid contacts to stick, be sure to confirm battery health when replacing a “defective” solenoid.

Doug C
December 29, 2019

Direct replacement for Cessna starter solenoid. The original had on three connections, the ground connection was simply the case. This version did not pose any installation problems, the ground wire was included and simply connected to one of the mounting bolts.

Joshua M
September 5, 2019


Q: How much does this Sky-Tec Starter solenoid weigh?

Without packaging, solenoid by itself weighs approx 1 lbs.The solenoid weighs 1.2 lbs with packaging.

Q: I am replacing the original starter on my 1967 Cessna 150G with a Skytec kit Kcst2. Which Skytec solenoid should I order?

For a 12V system see part number 07-03562. For a 24V system see part number 07-03563.

Q: Why is this Sky-Tec starter solenoid intermittent?

Starter solenoids / relays are intermittent, and Master solenoids / relays are continuous.

Q: What size are the terminal studs on STS-S12 starter solenoid?

5/16" on the main studs and there is a small stud that is 3/16".

Q: What is the distance between mounting holes?

2-1/4" hole center to hole center.

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