2007 115hp 4stroke EFI fuel issues

[superdave670]

Engine starts real good, idles good, runs up to WOT no problem, but after about 45 seconds starts to loose rpms and then goes into limp mode. If you pump the primer bulb in the fuel line then it will run good again for about 45 or so seconds. Looked at another 115 Hp EFI and it does not have a primer bulb in the fuel line! Should this unit have a primer bulb??

 

[superdave670]

Sorry, forgot that it's a Mercury $stroke EFI !!

 

[schematic]

look for air leaks in the supply line, plugged primary filter or malfunctioning primary fuel pump

 

[schematic]

look for air leaks in the supply line, plugged primary filter or malfunctioning primary fuel pump
In my opinion, all engines should have a primer ball. Can get you home in the event of certain failures, and is a good indicator of fuel supply restrictions.....