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Ford Tractors Discussion Forum

Old Ford Tractors and Old Franklin Aircraft Engine

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10-24-2003 05:33:13

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This is a shot in the dark but you never know what the guys on this forum are playing with. I have an old 65 HP Franklin aircraft engine that was given to me and I am trying to get it running again. It is not airworthy but I want to see if I can get it going. Does anyone have access to an overhaul manual? The Model Number is: 4AC-176B2. Thanks for any help.

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Oldfarmboy Jim

10-24-2003 21:08:56

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 Re: Old Ford Tractors and Old Franklin Aircraft En in reply to awhtx, 10-24-2003 05:33:13  
Just go to your nearest airport and look up one of the general aviation mechanics. He'll put you on the right track. Many of these antiques are still flying and being repaired everyday. Good luck, Jim

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10-24-2003 18:45:04

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 Re: Old Ford Tractors and Old Franklin Aircraft En in reply to awhtx, 10-24-2003 05:33:13  

What are your plans for this find? Spin a prop and make some wind? The end result will determine how much time/effort you want to exert. If your plan is to say I have an airplane engine want to see it run then only 3 things are required, spark, air and fuel.

Why does it need to be overhauled? Does it turn over by hand? Is it complete? What is your mechanical back ground?
Not enough info to advise.


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10-25-2003 02:07:13

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 Re: Re: Old Ford Tractors and Old Franklin Aircraf in reply to BigWill, 10-24-2003 18:45:04  
The engine sat in a shop for many years with the 2 rocker box covers removed from one side and mice got inside the engine. Therefore the cam, pushrods and cylinder walls are rusted. I tore the engine down and cleaned up the rust and honed the cylinders. I want to re-assemble the engine and try to start it. I may then sell it if it's worth anything to anyone and of course I will tell them that it is not airworthy. I need to know the torque values for all of the bolts and the main thing I need to know is how to time the camshaft to the crankshaft. When I got it all cleaned up I could not find any marks on the timing gears.

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10-24-2003 18:17:04

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 Re: Old Ford Tractors and Old Franklin Aircraft En in reply to awhtx, 10-24-2003 05:33:13  
The Franklin aircraft engine tooling was sold back in the 1970's to a Polish firm. I think they're still building them. Instead of trying to get the engine running, you might check out some aviation boards and see if someone out there is in need of your engine, either for parts or for a homebuilt. You can always list it in Trade-A-Plane (an aviation-only classified newspaper) Replacement parts are readily available and it is worth something to someone. If you get it running and it throws a rod or some other major catastrophie happens, then it's of no use to anyone.

Just my $.02


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10-25-2003 02:16:06

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 Re: Re: Old Ford Tractors and Old Franklin Aircraf in reply to OK-AL, 10-24-2003 18:17:04  
The Polish company does not make this engine- they only make 6 cylinder engines that are completely different from this one and they have no information on it. There are very few (if any) parts in this engine that would be airworthy. It's only use would be to a museum for display purposes.

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10-24-2003 13:57:54

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 Re: Old Ford Tractors and Old Franklin Aircraft En in reply to awhtx, 10-24-2003 05:33:13  
You might try writing to the Museum of Flight in Seattle. They may be able to help.

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Ren Bernier

10-24-2003 05:50:59

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 Re: Old Ford Tractors and Old Franklin Aircraft En in reply to awhtx, 10-24-2003 05:33:13  

If I were you I'd contact the Owl's Head Transportation Museum (www.ohtm.org).

The guys there are friendly and they restore and fly all sorts of vintage (and I mean OLD) aircraft. They may be able to help.

Topsham, Maine

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