Sky-Tec Starter Conversion Kit KCST2

+$200 Core Exchange Charge
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Part# 07-00721
MFR Model# KCST2


STC Certified conversion kit featuring C12ST2/S starter for A65-12, A75-12, C85-12, C90, C145, O200 or O300 engines previously fitted with TCM's pull-type starter. Complete conversion kit includes C12ST2/S starter, push-button switch, push-to-start placard, wiring harness, two STC's (one for airframe modification, one for engine modification) and instructions. Sky-Tec starter is about 5 lbs. lighter than stock OE starter and provides increased cranking torque. 2-year factory warranty.
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WARNING: Cancer and Reproductive Harm -


  • Ditch your pull-cable and lifeless antique starter. If it has not died already, it's just a matter of time. And aren't you tired of adjusting that pull cable so that the starter energizes only at the very end of the pulling motion? Sky-Tec ST2 starters are proven, durable and provide much quicker rotation for easier, effortless starts. ST2 starters feature no-maintenance, self-resetting kickback protection.


  • Two-year factory warranty.
  • FAA/STC'd.

Core Return Policy

Any unit being returned for core or warranty core credit shall be, as removed from the engine, complete and not disassembled. No core or warranty core credit will be allowed for automotive units. Units that are rusty or cannot be overhauled for any reason will be classified as scrap, having no value. Units which have been weld repaired, as well as units which have been disassembled and then reassembled with old parts, will also be classified as scrap, having no value. A percentage of the core value will be charged for all missing or damaged parts. At no time will the damaged or missing parts charge on any unit exceed the core value of that unit.

1. Core will only be accepted for credit 12 months from date of invoice.
2. Cores returned in excess of cores invoiced will not be accepted.
3. Cores must be of like purchase, a directly superseded unit or replaced unit when installing an STC'd product.
4. Competitive product cores are acceptable returns.
5. Cores must have a legible data tag for part and serial number verification.

Note: Customer will need to provide core for overhaul in the event our supplier does not have cores available to overhaul.

In The Box

  • 1 - C12ST2/C starter
  • 1 - Switch
  • 1 - Wiring harness
  • 1 - STC
  • 1 - Instructions for conversion of O-200, C85, C90, C145 & O-300A-C.
  • Accessories
  • Frequently Purchased With
  • Customers Also Viewed


I have one of these with over 3,000 hours on it without a single problem. I installed this one on one of my other planes and it saved me 6.7 pounds. It does take some work, but its worth it.

Jess G Verified Purchase


January 26, 2023

This was the 4th starter I installed, they all work great! Highly recommend them.

James R Verified Purchase


April 13, 2022

Love it! When I was getting ready to buy the starter conversion kit, the questions below were confusing and some of the answers were wrong. The kit does comes with EVERYTHING you need including the gasket, and the solonoid is part of the starter. The new starter turns the engine so fast that I have to give it twice the amount of prime as before so that the engine has a chance of keeping up with the starter speed after it catches.

Dan K
September 20, 2021

They include a really nice plastic block off plate to keep out the metal when you cut the shaft. Buy a dremel and 25 small cutoff wheels. It’s time consuming to cut the shaft but the effort is worth it. It cranks so much faster now, and the starter is much lighter. Can’t go wrong.

406 A Verified Purchase


July 15, 2021

Currently installing, everything looks good so far.

Alvin G
March 22, 2019

Winston M
December 17, 2018

As described promptly shipped.

Ray T
November 20, 2018

Correct URL for Skytec.... no rating yet havent ordered it... OEM 172A pull starter is spinning but not engaging engine...

Cristina G
November 12, 2021

four Star Good Received. the core will be returned as soon we remove from aircraft. Item were received later than expected .No Priority mail was accomplished.

Jose J
May 6, 2021


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: will this skytec starter conversion kit kcst2 suit continental 300 cessna 172 australian register DOZ

Please refer to the Skytec fit guide on their web site as a guide. The KCST2 is used for some 0-300 engines with a pull start. .

Q: Is this installation guide available for this Sky-Tec Starter Conversion Kit KCST2?

Yes, we have added the installation guide to the 'Documents' tab of this web page. Please review it there. We have also added two additional drawings that will help the installation.

Q: Does this Sky-tec Starter Conversion kit KCST2 contain a starter solenoid or must I buy it separately?

No, this kit does not come with a solenoid. You will need to purchase this separately.

Q: Does not come with a solenoid ...? Isnt the starter solenoid built into the starter unit? And IF this also requires a separate solenoid, what is the part number? Usually anything extra that is needed is listed as such in the accessories tab - why is the solenoid (if it really is needed) not listed there also? Please clarify.

The Q&A in in reference to the aircraft starter solenoid, which is not commonly installed in aircraft starters. The aircraft starter solenoid can last much longer than a starter, so is not commonly replaced when a starter is replaced. These solenoids can sometimes be considered an airframe part, so it may cause more confusion to list all of them as accessories, but we will look into this and add accordingly.

Q: What is the part number for the starter relay?

The STS-S12 or STS-S24 are commonly used.

Q: The core charge? I change the starter and send the old starter to you, and get reimbursed for the core charge? Is the core charge necessary?

Yes, there is now a core exchange charge tied to the purchase of this SkyTec starter conversion kit. We collect the charge at time of purchase, and when an acceptable core is returned ( in this case it is the starter coming off the aircraft), we will refund the core fee.

Q: When converting from old pull style OEM starter O-200, does this require the cutting and removal of the clutch shaft from inside the the accessory case?

Yes, must be cut and removed.

Q: Does the Sky-Tec kit KCST2 come with the gasket?

Yes, this kit comes with the gasket that goes between the starter and the engine.

Q: Just to clear it up, the starter has a built in solenoid. Please correct the answer where you said that it doesnt.

The starter for the KCST2 kit is part number C12ST2/S. BR The C12ST2/S has a solenoid that is used to engage and disengage the starter. br The solenoid on the starter serves a different function then the starter solenoid mounted on the fire wall.

Q: Come on people, all you have to do is look at the documentation (install) to see that this starter DOES contain all necessary solenoids. If you wish to use an existing solenoid (or wish to add an additional solenoid - which is NOT required, but could be done), the jumper between the S terminal and the Power terminal on the new starter is left in place if there is no existing solenoid, you remove the jumper and install a start switch between the S terminal and the + Battery terminal (or Power terminal on the new starter which is electrically the same as the + Battery terminal).

Thank you for your feedback. We will post this comment for other customers.

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