Posted for "Bill Edwards" <wpedwards@hilgardhouse.com>:

 Dear Bill:
 
 Thanks.  I will do the check, and then run it by the A&P who does my
 annuals, and maintenance.  There is another IVP on my field (SMO) that has
 the identical problem which they attribute to heat vaporizing fuel at low
 flow rates.    It doesn't happen after short flights of less than an hour.
 But if I go to altitude and run for a couple of hours, upon landing and
 stopping off the runway, with the RPM at a thousand, the engine quits
 immediately.  It takes a hot start to get it running again.  If I leave the
 fuel pump on, it continues running.  This is true of the other IVP as well.
 My theory was that the low boost pump kept enough pressure to push the heat
 generated vapor moving at low RPM whereas the engine driven pump did not.
 
 REgards,
 
 Bill Edwards
 

"""
 If your engine stalls at idle and you need low fuel pump boost to keep
 it running, it sounds like the idle mixture needs adjusting..
 
 Page 72-70-06 in the TCM Overhaul and Maintenance Manual outlines a
 simple check every time you shut down.(for TSIO-550)
"""