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O-540

 
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n520tx(at)gmail.com
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PostPosted: Mon Mar 21, 2011 5:11 am    Post subject: O-540 Reply with quote
Question about the engine mount that comes with the finish kit.

The engine mount ears on the O-540 can be one of two part numbers:

70456
12A19770

It appears that the difference is the size of the engine mount bolt thru
holes in them. The 70456 part is for all O-540 models *except* A1A5 and
A1D5, those two use the other part.

Will either of these work with the finish kit ? Is it just a matter of
using a different size bolt with different engine/cushion/isolator
mounts ? Or is this going to be a problem with the actual engine mount
provided with the vans finish kit ?

Thanks

Ron

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Rhonda(at)bpaengines.com
Guest
PostPosted: Mon Mar 21, 2011 5:37 am    Post subject: O-540 Reply with quote
The RV-10 mount requires the small hole mounts. If you are ordering a
new engine, then yours will have the small mounts. If you are using a
rebuilt engine or a mid-time engine, there is a chance that it could
come with the large hole mounts. I think some of the -C4B5 engines on
Aztecs used the large mounts. You can pick up the small hole mounts used
serviceable (just make sure they are inspected) or new surplus.

Rhonda

--

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kdbelue(at)charter.net
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PostPosted: Mon Mar 21, 2011 5:37 am    Post subject: O-540 Reply with quote
No, I tried making the large-hole mounts work- they won't because they have a different dynafocal angle. Use the small hole mounts (70456) and hardware as Van's uses and save time/ money.

Sent from my iPhone

On Mar 21, 2011, at 8:08 AM, Ronald Walker <n520tx(at)gmail.com> wrote:

Quote:


Question about the engine mount that comes with the finish kit.

The engine mount ears on the O-540 can be one of two part numbers:

70456
12A19770

It appears that the difference is the size of the engine mount bolt thru
holes in them. The 70456 part is for all O-540 models *except* A1A5 and
A1D5, those two use the other part.

Will either of these work with the finish kit ? Is it just a matter of
using a different size bolt with different engine/cushion/isolator
mounts ? Or is this going to be a problem with the actual engine mount
provided with the vans finish kit ?

Thanks

Ron







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n520tx(at)gmail.com
Guest
PostPosted: Mon Mar 21, 2011 7:36 am    Post subject: O-540 Reply with quote
On Mon, 2011-03-21 at 08:26 -0500, Kevin Belue wrote:
Quote:
Use the small hole mounts (70456)

Thanks Kevin and Rhonda -- My confusion stemmed from the O-540 parts
catalog saying that the A1D5 has the 12A19770 mounts - that's the model
number that is stamped on my engine plate. (From an Aztec.)

The good news is that the part number that I just read off of the ears
is 70456.

No action required on my part.

Build on.

-Ron

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davidsoutpost(at)comcast.
Guest
PostPosted: Mon Mar 21, 2011 8:49 am    Post subject: O-540 Reply with quote
Aero instock carries nice new machined mounts also. Reasonably priced. http://www.aeroinstock.com/products/APS-70456/6202/47458/product_detail/index.html

David Clifford

RV-10 Builder
Howell, MI
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