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Fuel Supply Module Priming Procedure
The fuel supply module (FSM) is not vented to the ambient air. The air trapped in the FSM, fuel lines, and fuel
rail, will be slightly compressed during the initial ignition key "ON" with a dry or drained fuel system. Additional
key "ON" events under these conditions, will not compress the air further to finish the priming of the FSM.
Excessive number of key "ON" events may eventually damage the fuel pumps. The volume of air trapped in
the FSM must be purged to prime the fuel system. This can be achieved by connecting a tool to the fuel rail
Schrader valve fitting to quickly purge the system into an approved container, or by cranking the engine.
PRIMING THE FSM WITH A PURGE TOOL
The use of a purge tool for priming the FSM is the preferred method, but is not always practical. The objective
is to purge the air entrained in the fuel system through a purge tool connected to the fuel rail Schrader valve
test port. During the key "ON," opening the dump valve will allow the air to be purged from the FSM and fuel
rail. This method should be used on vessels where the fuel inlet system to the outboard is restrictive; anti-
siphon valve or holds a relatively large volume of fuel because of a long fuel supply line or water separating
fuel filter. If a primer bulb is installed, it can be used during the priming event to shorten the amount of time
required to start the engine.
1.
Verify the engine is in a level vertical position.
2.
Verify the vessel fuel supply line is connected to the outboard fuel system inlet fitting.
3.
Connect a fuel pressure gauge to the fuel rail Schrader valve.
4.
Secure the fuel pressure gauge purge hose into an appropriate fuel container to collect excess fuel.
5.
Open the fuel pressure gauge purge valve and turn the ignition key "ON." The fuel pumps will run for
approximately five seconds.
6.
Turn the ignition key "OFF" and then back "ON." The fuel pumps will run for approximately five
seconds. Continue this ignition key cycle until the purged fuel is relatively clear of air bubbles.
NOTA: If the outboard fuel system does not prime within 15 key "ON" events, check for leaks in the fuel
supply line to the outboard. Repair as needed. If no leak is found, the fuel supply system to the outboard
may be too restrictive. Correct the condition and try again.
7.
Remove the fuel pressure gauge.
8.
Turn the ignition key "ON." When the fuel pumps stop running, start the engine. The engine may not
start on the first attempt. The engine will run rough at idle for up to two minutes while the residual air is
purged from the fuel system.
PRIMING THE FSM (RAN OUT OF FUEL CONDITION)
The use of a purge tool for priming the FSM is the preferred method, but is not always practical. When the
vessel fuel system is void of fuel volume, it can be primed without the use of a purge tool. The objective is to
purge the air entrained in the fuel system through the fuel injectors during engine cranking to allow fuel to
enter the fuel module. This method can be used on vessels where the fuel inlet system to the outboard is less
restrictive and holds a relatively small volume of fuel; a short fuel supply line, no water separating fuel filter, or
water separating fuel filter is already primed. If a primer bulb is installed, it can be used during the priming
event to shorten the amount of time required to start the engine.
1.
Verify the engine is in a level vertical position.
2.
Verify the vessel fuel supply line is connected to the outboard fuel system inlet fitting.
3.
Turn the ignition key "ON." The fuel pumps will run for approximately five seconds.
4.
Turn the ignition key to the "START" position and release the key. The ECM controls the activation of
the starter. The starter may continue cranking for up to eight seconds.
NOTA: When priming a drained fuel system, residual fuel may cause the engine to flare and stall which
shortens the engine cranking event.
5.
Continue with the ignition key "ON" and "START" sequence until the engine continues to run.
IMPORTANTE: Allow the starter motor to cool for 20 to 30 seconds between full eight second crank events.
Limit the number of events to a maximum of 10 full eight second cranking events.
6.
Once the engine starts, it may run rough at idle for up to two minutes while the residual air is purged
from the fuel system.
FUNCIONAMIENTO
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