Pump

[Ken Thompson]

Use the line that would go to your muffler as a vent.  If you are drawing 
fuel from the tank, via a pump, you need a vent to equalize the pressure in 
the tank, so as to not cause a vacuum.  If you are sucking the fuel out, you 
need to allow air back in.  I normally fun the line straight down and out 
the bottom of the fuse, attach the line with a clamp to the firewall.  You 
can also put a check valve in line to allow air to enter and no fuel to 
exit.

After all of this, I never asked, do you already have the tank vented?  That 
should have been my first question.

One more thing, I've run the Perry VP-20 with muffler pressure, it works 
great.  I believe the VP-30 says not to use muffler pressure.

Ken
----- Original Message ----- 
From: "Jay Marshall" <lightfoot at sc.rr.com>
To: <discussion at nsrca.org>
Sent: Sunday, December 04, 2005 7:48 AM
Subject: Pump


> Just installed a O.S. FL-70 4 stroke into a new plane and added a Perry 
> pump
> because the fuel tank is over the CG. The question is: should I disconnect
> the standard silencer-tank pressure connection?
>
> Jay Marshall
>
>
> =================================================
> If you want your reply email to go to the list, you must Cc: the list!
>
> To access the email archives for this list, go to
> http://lists.f3a.us/pipermail/nsrca-discussion/
> To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> and follow the instructions.
>
> List members email returned for mailbox full will be removed from the 
> list.
> 

=================================================
If you want your reply email to go to the list, you must Cc: the list!

To access the email archives for this list, go to
http://lists.f3a.us/pipermail/nsrca-discussion/
To be removed from this list, go to http://www.nsrca.org/discussionA.htm
and follow the instructions.

List members email returned for mailbox full will be removed from the list.