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Marcruiser 5.0 MPI acts like starving for fuel

Jmcwhorter611

New member
Hello,
My boat just started acting like it is starving for fuel. I runs great for 3 to 5 minutes then starts acting like it can't get fuel. The engine doesn't die but the RPMs go up and down. I pull the engine back to idle at about 750 to 1000RPM and it idles fine. I wait 3 to 5 minutes run it up 3000RPM then the engine runs great for 3 to 5 minutes then repeats. I changed the $60 fuel filter in the fuel module and that didn't help. I have fresh fuel in the boat. What are your thoughts?
 
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