Mercury V8 250 User Manual

1 - Port fuel rail
2 - Starboard rail and injectors
3 - Fuel inlet from vessel
4 - Starboard rail hose quick‑connect
5 - Filter to fuel supply module (FSM) hose
6 - FSM
7 - Manifold reference base hose
8 - FSM T‑fitting
9 - Manifold reference quick‑connect
10 - Port rail hose quick‑connect
11 - Port rail hose
12 - Water‑separating fuel filter
13 - Manifold reference
14 - Starboard rail hose
15 - High‑pressure to fuel rails
16 - Fuel pressure regulator
17 - Fuel cooler
18 - High‑pressure fuel pump
19 - Siphon tube
20 - Fuel cooler
21 - Fuel lift pump
22 - Recirculation check valve
Fuel System
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 7A-5

Mercury V8 250 Specifications

General

Engine Type	V8
Horsepower	250 HP
Displacement	4.6L
Fuel Induction System	Electronic Fuel Injection (EFI)
Steering	Hydraulic Steering
Gear Ratio	1.75:1
Cylinders	8
Starting	Electric Start
Full Throttle RPM Range	5200-6000 RPM
Alternator Amp	85 amp
Shaft Length	25 in
Weight	527 lbs
Fuel Type	Unleaded 87 octane minimum