7. Repeat this cycle until fuel is visible in the clear hose. Fuel does not have to reach the collection tank. Once fuel is visible
in the clear line, the air has been evacuated and the system is primed.
a - Fuel pressure test port on fuel rail
Pressure relief collection tool
a - One‑gallon fuel can (collection tank)
b - Separate fuel can vent
c - Clear hose
d - Fuel pressure adapter (90‑803135)
8. Remove the pressure relief tool from the fuel pressure test port and install the cap.
9. Wipe up any fuel that may have spilled.
10. Ventilate the engine compartment.
11.
After priming the fuel system, continue the engine preparation. Refer to the appropriate Mercury MerCruiser Installation
Manual. All other procedures in the installation manual remain the same.
Important Information
Low Permeation Fuel Lines
Beginning in 2007 all spark‑ignition marine inboard and sterndrive engines sold in California must use low permeation fuel
supply and return lines to comply with applicable California Air Resources Board (CARB) regulatory standards.
MPI ECT Fuel System
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 5A-7
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