REFLECTOR: Boost pump high pressure

Sid Knox via Reflector reflector at
Sat Jun 20 22:38:18 CDT 2015

----- Original Message ----- 
From: "Andrew Judge via Reflector" <reflector at>

Subject: REFLECTOR: Boost pump high pressure

> On my IO-360, when I hit the boost pump, it goes too high – like 65PSI.
> Anyone know if there is an adjustment on this that can be done or if there 
> is
> something that is typical to this happening?  It’s the standard Weldon 
> pump
> that the factory recommends I think.

Andy, my Velocity has a pressure regulator that limits at around 25 or 30 
psi and dumps the bypass fuel back to the header tank.
I don't know what you or others are using.
If your fuel system uses a regulator, it appears that it is not functioning 
Or, maybe it is and your pressure gauge is whacked.



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