Hello All-

Well -- if anyone was wondering whether the *unlabelled* electrical
connections on the MSD 2225 fuel pump were polarity sensitive, let me
assure you they are.

I spent over 2 hours making a huge mess trying to figure out why nothing
was coming out of my fuel pumps.  Paul's endless warnings of how fuel
pumps don't self-prime had me convinced I was having a 'head' problem.
So after disconnecting all the supply fittings (fuel going everywhere of
course) and trying to (I kid you not) gently pressurize the fuel tank to
blow fuel into the pumps, followed by raising the tail to head height to
put the tank wayyyy above the pumps, I was about ready to give the
airplane a good swift kick & go home.  At that point a little voice
reminded me that the pumps were being powered by VDC.  I switched the
leads & voila -- 60psi of fuel through the regulator in nothing flat.

Just another fun day of experimental airplane building...

Mark Supinski


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