Question:
When replacing a B&C or Kelly starter
with a Sky-Tec, why doesn't the alternator strap fit properly
between the starter and alternator?
Answer:
As the starter OEM to Lycoming, Sky-Tec
holds the location of the threaded hole
in the alternator boss of the starter to a
very tight tolerance specified by Lycoming.
Unfortunately, other starter manufacturers
don't.
Solution:
Go back to the original OE Lycoming
alternator strap (Lycoming PN 74323)
Fits like a glove.
Question:
What bolt should be used to secure an
alternator strap to the starter's alternator boss?
Answer:
Thread: 5/16-18
MS20074-05-06
Why
such an odd (expensive, hard to find...) bolt?
You'll
find that all threaded holes in aluminum on aircraft engines
are coarse threaded.
Tapped holes in aluminum
should never be fine threaded in engine applications (or so
we've been told).
Where
do I buy it?
This just in from a customer: try
http://www.gen-aircraft-hardware.com/
Thank you, David for the tip!
What
does it look like?
