Fuel Feed System - TOHATSU MFS25 Service Manual

Fuel System (Fuel Injection)

(3) Fuel Feed System

Fuel pump 4 (low pressure mechanical type) draws fuel from fuel tank 1, and feed it to fuel feed pump 6 (FFP) located
in the vapor separator 5 through fuel connector 2 and fuel filter 3.
Highly pressurized fuel passes through fuel cooler 7 and high pressure fuel filter 8, fed into fuel rail 9 and fuel injector
0, and then, injected into intake manifold.
Excessive fuel that is not used by fuel injector 0 (fuel that cannot enter high pressure fuel hose to fuel rail 9) passes
through high pressure fuel filter 7 and then fuel regulator q, and returns to vapor separator 5 to keep fuel pressure
constant.
Stabilization of fuel pressure is performed by fuel regulator.
e
w
r
1
Fuel
Fuel Tank 1
Vapor Separator 5
Fuel Regulator q
High Pressure Fuel Filter 8
Orifice w
4-22
q
5
6
3
2
Air
Fuel Connector 2
Fuel Feed Pump (FFP) 6
Air Vent e
7
4
8
Fuel Filter 3
Fuel Rail 9
9
0
Fuel Pump 4
Fuel Cooler 7
Fuel Injector 0
Intake Manifold
Bottom Cowl r
Open to Air
25/30 2006