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We normally don’t work Fridays but I decided it was a quiet day so I wanted to get my hands “dirty” assembling a fresh 220 Franklin. And yes it has a FAA approved camshaft repair per our repair specification that only we have.Image attachment

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do the oil pump pickup tubes break in these?

Did you find someone to do the flight testing on your O-300 stc?

Would be cool if Airworx LLC could become the owner of the Franklin engines, nothing seems to happen with the current holder of the rights.

What repairs are you doing to the cams? Are you spray welding to build them back up?

It warms my heart to see you guys working on Franklins

Glad to see these Franklin photos again

Does the engine stand need an adaptor for the Franklin ? Im.thinking about getting a stand.

Can you tell us about your camshaft repair process?

Glad you are back working on Franklins!!!

Glad you still do Franklins

When the painting is done and re-assembly is done etc…last item Will be re assembling the 0-320 E2D. I willCheck with you as we get closer to that time. Want to be able To Let You do break in runs andBring it back and hang it right away. Will be next to last work in the restoration project. OnlyItem After that will be avionics! Then inspection sign off and fly!

Well done 👍 keep it up with Franklin engines.

I had sent a private message to you about O435 piston rings/parts, wondering if you could help us out?

I don’t see any dirty hands?

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How much power?

I absolutely love the smell of a fresh reman or overhauled engine after the first few run-ups!!! I've changed a few earlier in my A&P career...

Is your absorption unit water or eddy current or ?

I’ll take it!

Price for reman L model nowadays?

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9 months ago

Airworx LLC

We will be building a Continental O-200 which will be for sale outright. This will have new cylinders, new hardware, real gasket pushrod tube kits, overhauled magnetos, overhauled carb, new ignition harness, new spark plugs, and all of the internal steel as well as case will be in repaired/overhauled condition. Should be available within the next 2 weeks so it’s first come first serve on who puts a deposit down. 38K outright sale. If you want a liteweight starter and alternator you are looking at 41k. It’s not cheap but will be a very nice engine especially since no cranks are available. ... See MoreSee Less

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Kevin Fisk

Rich Christie

Off topic, you have any o320b2b's 160hp available?

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A beautiful sight!


Nice bench! 😊

Very good Eng

300HP ,EXELENTE motor,cuántos momentos vividos a lo largo de 42 años,gracias...

It's nice

Ich arbeiten hier immer wieder an solch Lycoming Motoren. Sehr robuste, gute Flugzeug Motoren! 👋🇺🇲

Gracias por tan bonitos recuerdos

Me interesa

And I thought the prop made that signature sound all these years!

I there wasn't Listened this best engine without Propeller

What's a ballpark overhaul with Millenniums like this one going for right now?

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What were the Dyno numbers?

10 months ago

Airworx LLC

We would like to share some updated info on the Continental O-300 Hp upgrade. we now have a completed and approved data package that will follow the first engine modified at Airworx, with the data package being completed and the dyno testing done we can now begin the endeavor of getting the STC approval. Our engineer has come up with the cost and the plan. We will potentially need someone that is will to pay for an overhaul with the modification and that will allow engineering witness flight testing. The closer to SC the better and it may take a while to get it all done. My suggestion is to contact as he is compiling a list of interested parties in this modification. ... See MoreSee Less

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Ron Williams

Any thoughts about re-grinding / shaping the cam to get additional HP as they do on air boats?

If I had the money I'd totally be down to be the guinea pig! My blue angels themed 172b would be sweet with 180hp!


What do you anticipate the overhaul + modification to cost, roughly?

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After countless former customers and new customers calling us about us getting out of the Franklin overhaul business, we will be getting back into them. The parts have been an issue and since we are the only FAA Part 145 repair station with the approval to do them we have the ability to get more FAA approved repair specifications written. Things such as camshaft bearings, piston rings, cylinder liners, guides, valves and oil pump gears have all been nearly impossible to find for assemblies. We already have many proprietary FAA approved repair specifications for Franklin and we are willing to get more repair specifications written in order to keep these legacy engines flying. That being said, we will also be filing FAA complaints against other shops or individuals that are overhauling these engines with non-approved parts. We know who the shops and builders are and know what parts they use. The demand has been too much for us to turn our back on Franklin so stayed tuned for more Franklin builds.

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Glad to hear that. I have a Franklin in a Hiller 12.

Outstanding information

Good for you & all Franklin engine owners! 👍 Thank You for your commitment.

Wow! Glad to hear!

This announcement just made my day. Thank you for not giving up on us. We all believe in you and appreciate what you mean to our safety and our wonderful vintage engines.


Thank you for continuing the support. I’ve been flying a Franklin 165 for 20 years, and it’s great to know there is someone out there to help.


This is the best news I’ve had all morning! I’m glad your still in it. I know it’s just a matter of time before I bring you mine.

Best news I have read in a long time!!!

Thank you!

Great to hear.

Thank You!

Thank you!

That's AWESOME. Hope to see you soon !


Good news!!

Good for you guys!

That's wonderful news!

Cue the confetti!!! Great news!

This is great news! Airworx LLC Thank you for your dedication in supporting general aviation. I totally understand the fustrations of dealing with allegations and not so honest people. I'm sure you guys will come out on top and at some point I think the Fed's will figure out who the problem is. Again great news and thank you!

This is exciting! I was about to give up on my 220.

Kudos to you! The Franklin engine deserves to live on. It is a truly robust design. Thank you for staying in the game and helping push forward and keeping these engines alive!!!

Great news, Chris. AirWorx overhauled all new cylinders on my 165 and they’re as great as can being

Thank you Chris we need you supporting our engines

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11 months ago

Airworx LLC

Our phones are down until at earliest Friday. Please email if you need anything. ... See MoreSee Less

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Try to Enjoy the silence.

More progress on the 470 Continental.Image attachmentImage attachment

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Do you need a carburetor for it?

Awesome, this design is genius, thanks for sharing.

What paint do you use on the case?

What well engine max out for HP before the block starts flexing

Continental O-470 going together.

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Perfect job

Nice job

Wow good job

Awesome. Want to do my 470s ?

Boas materias

Courage kakana mécanique Kitoko

Very nice work 👍

Very good work

Mécanique Kitoko makasi famille pys kaka Kitoko makasi


That looks AWESOME







Looks beautiful.


What’s a ball park price to overhaul a 470 these days?


Thanks. I always wondered

Albero motore o a manovella con le bielle

What is that

Nice engine

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These are a few of the special tools we describe gned and manufactured in house. All these are for Lycoming engine parts.

Crankshaft gear modification fixture
Roller lifter repair fixture
Oil nozzle testing fixtureImage attachmentImage attachment

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Awesome, thanks for sharing.

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Only about 50 times faster than a Tobin arp. Lol. It has the reach to do the front bore?

That is NOT how I thought that would work, interesting

It’s really disheartening to have to quit building these vintage Franklin engines. This is the dyno results from our last Franklin 165 engine and the horsepower calculations from a calibrated engine Dyno are just crazy. Gotta love old school engines until the certified parts run out for them. This is the second power run with the same results as the first.Image attachment

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Clone it with improved materials

Chris, If owner supplied every last necessary part needed with all with correct 8130’s and necessary paperwork, would you be willing to machine, assemble and run in a Franklin?

Super sad you are not going to do franklin's, I am going to need mine done and your the only mechanic I trust other then myself to touch my plane. Maybe when the time comes we can work something out, a/p to a/p

Last 220 I flew behind was super strong!!! It always seemed like more than 220.

To bad, don't maintain a lot of franklins but I like them a lot, even though they have some typical quirks. But the same goes for my Lycoming O435/290 engines.

That would explain why my Stinson seems to have so much more spunk than a 172 of supposedly similar power!

Do an experimental line. Keep them things alive.

Poland for parts?

Awesome numbers and hopefully the 0-300 can get close to that .....

Would you say the 165 makes more than 165 at the prop ? Looks like it does. Thanks for the past support.

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The brand new Rottler F69A CNC machine has finally made it.

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How long did you have it on order?

Let the chips fly

That's a Beauty!