Special Tools
Clamp Tool 91‑803146T
Used to clamp high pressure (Oetiker ®) hose clamps. Part of Clamp Tool Kit
(91‑803146A4).
Fuel Pressure Gauge Kit 91‑881833A03
Tests the fuel pump pressure; can be used to relieve fuel pressure.
Digital Pressure Meter 91‑892651A01
Connects to the fuel system/manifold and can be used in conjunction with
Computer Diagnostic System (CDS).
Fuel Pressure Specifications
Conditions
Reading on Fuel Pressure Gauge
Approximate fuel pressure at idle 280–310 kPa (40.6–45.0 psi)
Approximate fuel pressure engine not running 340–370 kPa (49.3–53.7 psi)
Fuel Requirements
NOTICE
Running out of fuel can damage catalyst components. Do not allow the fuel tanks to become empty during operation.
IMPORTANT: Use of improper gasoline can damage your engine. Engine damage resulting from the use of improper
gasoline is considered misuse of the engine and will not be covered under the limited warranty.
Fuel Ratings
Mercury MerCruiser engines will operate satisfactorily with any major brand of unleaded gasoline that meets the following
specifications:
USA and Canada ‑ A posted pump octane rating of 87 (R+M)/2, minimum, for all models. Premium gasoline 91 (R+M)/2
octane is also acceptable for all models. Do not use leaded gasoline.
Outside USA and Canada ‑ A posted pump octane rating of 91 RON, minimum, for all models. Premium gasoline (95 RON) is
also acceptable for all models. Do not use leaded gasoline.
Using Reformulated (Oxygenated) Gasoline (USA Only)
Reformulated gasoline is required in certain areas of the USA and is acceptable for use in your Mercury Marine engine. The
only oxygenate currently in use in the USA is alcohol (ethanol, methanol, or butanol).
MPI ECT Fuel System
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 5A-3
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