If you are not using a gravity flow system to feed the carb, it is highly advisable to use a fuel pressure gauge. Among other things, the pressure gauge allows you to verify that both pumps are working correctly prior to takeoff as opposed to waiting for the eventual failure. Although there may be exceptions, I don't know of any non gravity feed system in general aviation that doesn't have a fuel pressure gauge as a required instrument, meaning that if it isn't working, they plane isn't airworthy.
Mitchel makes an affordable electric fuel pressure gauge. Uses a standard VDO sending unit, which is identical to the sending unit used in my Piper Tomahawk. You should also be able to order a VDO electric fuel pressure gauge (or several other brand names) through any autoparts store. If not, check the Mitchel and Rochester gauges in the Aircraft Spruce catalog. -Jeff -- "Glasseyegav" <gdono...@bigpond.net.au> wrote: But surely if you have a redundancy system in the form of two fuel pumps, wouldn't it would be nice to test both before heading off into the wide blue. Gav > Forget the fuel pressure gauge. Fuel flow is what you want, if the fuel is flowing then you must have fuel pressure. A good fuel > _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
