Eddie Trimmer in Wasilla Alaska has an STC to install a Maule Fuel Selector with, LEFT, RIGHT, BOTH, OFF Selections. It runs the right tank line underneath the seat (probably similar to Frank's Miss Pearl) but eliminates the gascolator under the right seat and places two low point sump drains on the left bottom of the fuselage just aft of the wing strut attach fitting. The Piper fuel valve is replaced with a Maule fuel valve. The STC also allows an alteration to the exhaust system with slip joints in front of the oil sump and enlarging the exhaust outlet of the muffler to three inches for those aircraft that have the Univair STC for the Lycoming O-360 engine. This allows the installation to be much more desirable because it does not butcher the lower cowling for exhaust stacks. Eddie has additional fuel capacity, 72 gallons. He describes..... "The fuel tanks in my airplane are Field Approved. I added a stock PA-22 eighteen gallon fuel tank in the next outboard compression bay of each wing, this gives me a total of seventy-two gallons of fuel. The outboard tanks are auxiliary tanks only. A solid state Facet fuel pump is used to transfer the fuel into the original tanks once the fuel is used from the original tank. I have an application for a STC which moves the aileron outboard 24" and then extends the flap outboard & inboard to the fuselage, as a part of this STC we may include the installation of an additional 18 gallon tank in either or both wings." -.-.-.-.-.-.-.-.-.-.-.-.--.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-. The following info was posted by Steve Pierce. Re: PA22/20 Fuel System Posted by Steve Pierce on: 15/Jun/2005 01:48 PM E-mail I recieved from Eddie: ------------------------------------------------------------------------------ "I just received an STC SA02241AK that alters the fuel system in Short Wing Pipers. The fuel valve is replaced with a Maule fuel selector valve that has LEFT,RIGHT, BOTH & OFF. The gascolator under the right seat is removed and a line is installed under the seat from the right side to the left side with two low point sump drains installed on the left side. The primary reason that I pursued this STC was to accompany the installation of a left seaplane type door. As it turned out there are a couple of other benefits, with the use of "goose neck" fuel caps which add pressure to the fuel tanks, the Lycoming O-360 180 Horsepower engine may be installed using a gravity feed fuel supply (eliminates the mechanical & electric boost pumps)." ------------------------------------------------------------------------------- You can e-mail Eddie at kl7mt@pobox.mtaonline.net The old Swallow's rt. tank STC for the Clipper use a sump drain rather than a gascolator. Eddie's system is just like a Maule which has two sumps. His Pacer has the left door mod and creates two low points in the fuel lines. Andy, You have the correct E-Mail address. mail address is: Eddie Trimmer P. O. Box 361 Willow, Alaska 99688-0361 Email (cooy and paste): kl7mt@pobox.mtaonline.net