Note! The mixture controls on that carb is NOT an idle cut-off type.
You must still either shut off the fuel supply and let the carb run dry
or use the mag switch(es) to shut off the engine. Minor detail, but
probably a good thing to be aware of. A lot of those mixture controls
were wired full rich. They were rather touchy.

It probably has the steel needle and seat installed so that it can run
on auto fuel. Those things seldom ever seat tightly. It might be best
to just keep the fuel shut off when parked. However, if you are unsure
what kind of needle/seat is installed and you plan to run auto fuel, you
should pull the carb off the engine and install the steel needle and
seat. Fresno Airparts has the conversion kit for $99.50. (559) 237-4863.

That carb has service instructions and parts list in my Maintenance and
Overhaul manual for the A50/A65/A75/A80. It is also available at Fresno
for $17.50. It MAY also be in the manual for the C-85, etc. and that
manual is $15.00, so you might call Fresno to check on that.

Scott
http://corbenflyer.tripod.com


Dick wrote:
My old C-85 has a Bendix Stromberg NA-S3A1, which is leaking for a time
after shutdown.

Previous owner of the plane had tied off the mixture control so shutdown is
by reduced throttle and magnetos turned off.
Casual conversations are leaning towards a needle seat or float level
problem. Any other possibilities?

Not knowing how the mixture control works inside the carb body and not
finding any carb parts breakdown pictures or float setting information
around in the chapter library today and having carb accessable with the
cowling off, can I just remove the airbox and then what appears to be the
float bowl for some kind of inspection??

I did see that A.S.S. has an overhaul manual and some pretty pricey needles
but am hoping to get back into the air sooner. Can anyone
help? Float setting procedure and needle inspection.

Thanks, Dick