Fuel Supply Connections
!
WARNING
Improper installation of brass fittings or plugs into the fuel pump or fuel filter base can crack the casting, causing a fuel leak
and possible fire or explosion. Always install fittings and plugs correctly, and do not tighten with power tools.
•
Use Loctite 567 Pipe Sealant on the threads of fuel inlet fittings or plugs. Do not use PTFE tape.
• Fuel inlet fittings or plugs should first be threaded into the fuel pump or fuel filter base until they are finger‑tight.
• Fuel inlet fittings or plugs should then be tightened an additional 1‑3/4 to 2‑1/4 turns using a wrench. Do not overtighten.
• To prevent fitting damage or overtightening when installing a fuel line, the fittings should be held with a suitable wrench as
the fuel line connectors are tightened securely.
Exploded Views
Fuel Rail Exploded View
Ref. No. Qty. Description
Torque
Nm lb‑in. lb‑ft
a 1 Schrader valve
b 1 Fuel connection
c 4 Fuel rail mounting screws 12.2 108 –
d 6 Fuel injector retainer
e 6 Fuel injector
f 12 O‑ring
MPI ECT Fuel System
Page 5A-8 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015
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