Originally Posted by lsearite
Got a 2002 Merc. Had same problem when first got it. Learned from friend to pull gas line off when close to docking
and let it run out of gas.....everytime. took care of it. Mine sat in open for 5 months, started on 2nd pull.
The new fuel injected motors are a little strange in how they work.
CG says no pressurized fuel lines in a boat, so therefore you can't do it like a car and just have a pump in the tank, On the Verado at least there is a tank on the back of the motor
with two fuel pumps in it and a float switch. Think of it like the tank on a toilet. One pump is the high pressure fuel injection pump, the other pump is a low pressure pump whose job is to keep the tank filled, the float switch activates this low pressure pump just like a bilge pump
, Ethanol eats up the float switch making it so the low pressure pump stays off, engine runs out of fuel.
Install a bulb in line (one is not installed with these high tech motors) and you can get home by pumping the tank full.
Then it gets even more interesting, the float is a ring on a stick so to speak that works I think by reed switches, anyway the float rides up and down on this stick and high RPM
sets up a vibration harmonic that shakes the stick so the float rides up on the stick cutting off the fuel pump, and the engine runs out of fuel, loses RPM
, harmonic changes and engine comes back to life.
The fix believe it or not was software
that changed pump timing somehow or another.
Things are getting complicated aren't they