Posted for mmcmanus@grandecom.net:

 I have similar hot start problems with the IO 360 in my Lancair. I have tried
 most of the fixes described in the posts on this subject with success, most
of
 the time.  However, I think my start up is related to the shutdown.  The
 throttle body in my plane does not have an idle cutoff (ICO).  So shutdown is
 tough.  98% of the time the engine will "disel" for 30-45 seconds before it
 finally stops.  This is after I have pulled the mixture all the way back,
 slowly advanced the throttle all the way forward, AND turned off the mags.
 The
 only way I have found to "smoothly" shutdown the engine is to turn the Andair
 fuel selector to off.  This allows the engine to shutdown smoothly, albeit it
 takes about 1 minute.
 
 Problem is, if I use the fuel shutoff to stop the engine, a "hot" restart is
 next to impossible.  If I go the other way and let the engine disel until it
 stops, then I can ususally restart the engine with one of the techniques
 described in the other posts.
 
 I understand that the makers of the throttle body sell an add-on that cuts
fuel
 to the throttle body and returns it to the tanks.  I am exploring that with
my
 A&P, but it looks like that will require a lot of work to plumb the return
fuel
 lines.
 
 One thing I will add to the other restart notes.  Using the techniques
 described, when the engine catches it will run very rough.  If I flick on the
 boost pump for 4 or 5 seconds AFTER the engine has started, the engine
quickly
 smooths out.  But if I turn the boost on before the engine start, it will
 normally flood the engine.
 
 Matt McManus
 LNC2 360