BOMBARDIER Johnson 90 Service Manual page 76

ENGINE CONTROL SYSTEM
ELECTRONIC FUEL INJECTION SYSTEM
FUEL VAPOR SEPARATOR
The fuel vapor separator incorporates a float system that maintains a constant fuel leve! inside the sepa­
rator chamber. As the fuel leve! decreases, fuel flows into the vapor separator from the low pressure fuel
pump. The function of this unit is to separate vapors from fuel delivered by the low pressure fuel pump or
fuel returned from the fuel pressure regulator. This vapor is routed through the evaporation hose con­
necting the vapor separator cover to the cylinder head cover.
HIGH PRESSURE FUEL PUMP
The high pressure fuel pump is an "integral" type in which the pump mechanism is located within the fuel
vapor separator. To supply the optimum fuel amount, the pump is driven by the duty cycle signa! from
ECM.
High pressure
fuel pump
Fuel pressure
regulator
Fuel return
º//El
~ Fuel return
Fuel drain screw Fuel drain
a
3-16