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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Cooling the TSIO550/fuel starvation with change of
 fuel tank
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Date: Mon, 01 Nov 2004 20:49:00 -0500
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Posted for "Jabe Luttrell" <JabeLuttrell@comcast.net>:

  Hello Pat,
  
  I've seen 3/8" supply lines give roughness to a 550 engine.  The problem
  goes away with 1/2" lines.  It is necessary to abide by the mechanical pump
  suction head requirements.  Pulling fuel through the 3/8" lines, through a
  non-operating electric fuel pump and up hill to the engine (especially in a
  climb) can result violation of the minimum suction head requirements of the
  engine pump.
  
  Jabe Luttrell