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Mercruiser 43L MPI does not start

bostonstingray

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"Mercruiser 4.3 L MPI 2003

"Mercruiser 4.3 L MPI 2003

After filling up the gas tank and returning to the dock (a 10 minute trip) the engine started to sputter and stalled out. It would not start up again. I switched out the fuel filter, (filling the new one with gas prior to putting it back on) and it still will not start. It appears that there is spark on the plugs but it seems the engine is not getting fuel. Any ideas? I did replace the fuel pump relay 3 weeks ago and it seemed to be functioning properly since, (you can hear the fuel pump when the boat is first turned on)."
 
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