Mercury V8 300 User Manual

Fuel System
Section 7A - Fuel System
Table of Contents
Fuel System Specifications................................................7A-2
Fuel System Overview....................................................... 7A-2
Theory of Operation....................................................7A-2
Fuel System................................................................7A-2
Fuel Injector................................................................ 7A-2
In‑line Fuel Filter......................................................... 7A-3
V6 Fuel Flow Diagram................................................ 7A-4
V8 Fuel Flow Diagram................................................ 7A-6
Fuel Supply Module (FSM)................................................ 7A-7
Fuel Supply Module (FSM) Description...................... 7A-7
Fuel Pressure Regulator.............................................7A-8
Fuel Lift Pump.............................................................7A-8
High‑Pressure Fuel Pump.......................................... 7A-9
Fuel System
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 7A-1
7
A

Mercury V8 300 Specifications

General

Horsepower	300 HP
Displacement	4.6 L
Full Throttle RPM Range	5200-6000 RPM
Fuel Induction System	Electronic Fuel Injection (EFI)
Gear Ratio	1.75:1
Starting	Electric
Shaft Length	20 in, 25 in, 30 in
Warranty	3-Year Limited Warranty
Engine Type	V8
Fuel Type	87 Octane
Bore x Stroke	92 mm x 86 mm