There are two types of Continental starter adapters for O-470 engines. 1)
What Niagra calls the "classic" version, needs a starter that is able to
turn freely when not energized, since the adapter must "unwind" a bit after
the engine starts. Such a starter adapter has been reported to have
problems with the older Sky-Tec starter for Cont. O-470's, C12ST1. The
newer Sky-Tec starter for Continentals, C12ST3 is supposed to solve this
problem, as this starter's output shaft can be turned by hand, in either
direction, when not energized. 2) The newer Continental starter adapter is
described in Cont. Service Bulletin M92-10. It "may" have been happy with
the older Sky-Tec starter (I don't know) and I don't know if Sky-Tec still
sells the ST1, since it now has the ST3. Continental's Service Information
Letter SIL02-4 describes a newer starter that sounds like it works like the
Sky-Tec ST1. I wouldn't want to use such a starter with the "classic"
starter adapter - a lot of which adapters are still in service.

How does one know which kind of starter adapter they have? The SB M92-10
says the newer adapter may exhibit varying degrees of resistance to
propellor rotation in the direction opposite to normal engine cranking
rotation. I don't think the "classic" adapter exhibits such resistance.

wrote in message
ups.com...

Newps wrote:
The starter bolts to the starter adapter. When you turn the key the
starter spins the adapter which in turn spins the engine. The new
starter operates a little differently from the original. The difference
is in how it engages and disengages. Lightweight starter and standard
starter adapter do not work for very long. You're right they bolt right
up but they don't play well for long.

Guy Byars wrote:
I'm not sure I understand, the flyweight starter from Sky-Tec is a bolt
on
replacement for the original. What adapter are you talking about?


"Newps" wrote in message
. ..

Do not get the lightweight starters without also replacing the starter
adapter with the model that works with these type starters. Call
Niagara Airparts and they will explain it all.

On the O-470 the starter is always engaged, and a coil
spring clutch acts as a one-way drive . What would the new drive
adapter have that's different?
We put a Lamar starter on an O-470, and it was so gutless
that we ended up buying another old Prestolite to replace it. Those
permanent magnets are only so powerful. I think the Skytecs or
Magnaflites might be better; we use Magnaflites on three 172s and they
work OK.

Dan