Hello everyone,
First time posting on here, I am currently in the middle of installing a new AvCon O-360 upgrade. I am wondering if anybody had any comments or advice, as well as most importantly, if anyone had the installation drawings from Bob, as we seem to be short a page or two. Any help on the installation would be greatly appreciated.
Thank you and great flying!
AvCon O-360 upgrade in progress (drawings needed)
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
- 170Frank
- Posts: 2
- Joined: Thu Aug 05, 2021 11:36 pm
- TFA170
- Posts: 135
- Joined: Tue Jan 26, 2016 3:18 am
Re: AvCon O-360 upgrade in progress (drawings needed)
I believe they are on here somewhere...you'll have to search for BUSH or AVCON
- 170Frank
- Posts: 2
- Joined: Thu Aug 05, 2021 11:36 pm
Re: AvCon O-360 upgrade in progress (drawings needed)
Thank you. We did and didn’t see any, but we’ll keep looking!
- GAHorn
- Posts: 21260
- Joined: Fri Apr 12, 2002 8:45 pm
Re: AvCon O-360 upgrade in progress (drawings needed)
Frank, our Mx Library has many documents regarding various mods on 170s….but to access them you must be a Member of “The Int’l Cessna 170 Assoc’n”….not merely a participant of these Forums. Contact headquarters via the Home Page for full Membership. ( Not guaranteeing what you want is actually in our Mx Library…but to access that Library requires Membership.)
My search of those documents showed the following link may be of assistance….
search.php?keywords=avcon&terms=all&aut ... mit=Search
Hope this helps.
(Meahwhile, why don’t you UP-load the pages you already have…and we can determine what it is that you lack?)
My search of those documents showed the following link may be of assistance….
search.php?keywords=avcon&terms=all&aut ... mit=Search
Hope this helps.
(Meahwhile, why don’t you UP-load the pages you already have…and we can determine what it is that you lack?)

'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.

- Bruce Fenstermacher
- Posts: 10410
- Joined: Tue Apr 23, 2002 11:24 am
Re: AvCon O-360 upgrade in progress (drawings needed)
Frank, as you are a TIC170A member, you will be able to see in our library and follow the link George posted now that I've upgraded your forum privileges to member status. Also helps to know exactly what drawing you are looking for because some of us have better searching skills and may find it when others won't. And there is always a chance someone has that drawing and are willing to send it to us when no one has yet in the past. That is how we've collected what we have.
Here is the links directly to the mother load of Avcon documents we have:
viewtopic.php?f=31&t=9329#p83259
viewtopic.php?f=31&t=9329#p83260
If you don't find what you need, as I said let us know what your looking for it could still be out there to be found.
Here is the links directly to the mother load of Avcon documents we have:
viewtopic.php?f=31&t=9329#p83259
viewtopic.php?f=31&t=9329#p83260
If you don't find what you need, as I said let us know what your looking for it could still be out there to be found.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
- DaveF
- Posts: 1555
- Joined: Sat Nov 03, 2007 1:44 am
Re: AvCon O-360 upgrade in progress (drawings needed)
You were able to buy an STC from Bob Williams? Do they sell parts?
- redacted
- Posts: 123
- Joined: Wed Jun 15, 2022 4:31 am
Re: AvCon O-360 upgrade in progress (drawings needed)
I have hi-res photos of the blueprints somewhere in the cloud. Someone on my plane’s instagram reached out asking about my conversion so I took the pics and emailed.
Nathaniel Perlman
1952 170B
N2282D S/N 20434
1952 170B
N2282D S/N 20434
- N3454C
- Posts: 24
- Joined: Tue Jul 16, 2002 9:48 pm
Re: AvCon O-360 upgrade in progress (drawings needed)
Let me know if you still need drawings. I had the original Avcon drawings scanned and sent in to the Association. I can always send to to you directly.170Frank wrote:Hello everyone,
First time posting on here, I am currently in the middle of installing a new AvCon O-360 upgrade. I am wondering if anybody had any comments or advice, as well as most importantly, if anyone had the installation drawings from Bob, as we seem to be short a page or two. Any help on the installation would be greatly appreciated.
Thank you and great flying!
- GAHorn
- Posts: 21260
- Joined: Fri Apr 12, 2002 8:45 pm
Re: AvCon O-360 upgrade in progress (drawings needed)
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.

Cessna® is a registered trademark of Textron Aviation, Inc. The International Cessna® 170 Association is an independent owners/operators association dedicated to C170 aircraft and early O-300-powered C172s. We are not affiliated with Cessna® or Textron Aviation, Inc. in any way.