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Ben,
I am having the same experience of the temporary engine stall when I
switch tanks for the first time.  One solution that works for me so far
is to climb to altitude, bring back my prop and mp to cruise. Leave the
mixture full rich and switch the tank.  Wait for 1-2 minutes and then
lean.

I have been in discussions with the Mark and Orin at the factory on
this.  They are uncertain of the cause and want to eliminate it.  

One IVP user switched out the fuel selector valve for the one that is
being currently supplied with the kits and eliminated the problem.  I am
probably going to do the same and see if it also eliminates this in my
plane.

Carl Cadwell
N25CL, 75 hours


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