Howdy!  I got an oooold OS Max 45 F, this thing is about 10 years old,
but still looks good.
Problem is, it won't idle worth a spit.  It's got the original OS 4BK
carb, ya know, the big-bore carb like the more modern SF and FX series.
I've tried setting the low-speed needle, but still won't really idle as
reliably as I need it to be...
It's a ringed engine, and if you turn it by hand, there's little
compression.  Once at speed, though, it's a terror... this thing
verticaled my Trainer Forty (Great Planes - about 6 lbs) for a distance,
but it won't idle!  I've been told ringed engines don't make compression
till they're running -- sounds fishy, I used to have a Honda 80cc four
stroker dirtbike, and it had PLENTY compression =-)
SO...  what can I do?  Try 15% nitro?  I usually run 5%.  New carb?  I
can't find it listed.  The SF uses a 4D, I wonder if it'll fit.
Argh.  I really don't want to buy a new engine.  That 45F sounds so
neeeet! 
Email to: sysop@phosphor.datasync.com or gonzol@gfherald.infi.net
http://www.gfherald.infi.net/~gonzol/index.htm
... wAkKO.Sys inSTaLLeD... CPU bEHaviNg *VErY* oDDly...
--- FMail/386 1.22
1:2808/100)
---------------