Edelbrock 1725 User Manual
Page 2
Part #1711, 1712, 1713, 1715, 1716, 1718,
1720, 1721, 1722, 1723, 1724, 1725, 1726
Rev. 9/12/12 - QT/mc
©2012 Edelbrock LLC
Brochure #63-1721
2 / 6
RE-POSITIONING THE LOWER PUMP BODY
NOTE: The lower pump body may be re-positioned as needed to allow better alignment of the fittings for specific applications.
WARNING: Personal protection must be given careful consideration. The pump body itself is spring loaded with a heavy diaphragm spring. If the
unit is taken apart for adjustment or re-positioning of the lower pump body, extreme caution should be taken when assembling and disassembling
the upper pump body to and from the lower pump body. Upon installation of the fuel pump on the engine, care should be taken to ensure that all fuel
lines and fittings are properly installed, tight, and not leaking fuel.
1. Remove the six (6) screws from the perimeter of the pump pulsator cover and separate lower fuel pump body from upper fuel pump body.
2. Rotate lower pump body to desired new position and start but do not fully tighten the six (6) retaining screws. Please note that the inlet and outlet
must be rotated together, or the pump will not operate properly.
3. Before fully tightening these screws, the rocker arm must be actuated to and held in the “full stroke” position. This is done to ensure that the
diaphragm will be pulled to and held in its maximum working (flexed) position while the retaining screws are torqued tight (25-30 in/lbs.). This
procedure will ensure against premature diaphragm wear and subsequent failure due to over-stretching of the diaphragm material when in the
full stroke position. Another by-product of an improperly set diaphragm is erratic fuel flow and pressure.
NOTE: This procedure can be assisted by holding the fuel pump in a vise or appropriate fixture, and holding the rocker arm down with
a pipe or similar tool.
4. The retaining screws should then be torqued to their 25-30 in/lbs. specification in a criss-cross or “star” pattern, to ensure even, progressive
tightening.
CAUTION: Do not over-torque the retaining screws or serious pump diaphragm damage will occur.
5.
After installing the fuel pump, run the engine and check for fuel leaks and proper operation. If leaks exist, stop engine immediately
and correct any leaks BEFORE any further engine operation.
Edelbrock LLC • 2700 California St. • Torrance, CA 90503
Tech-Line: 1-800-416-8628
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