2004 40HP EFI Idle Speed To Fast

bbrnhart

Cadet
Joined
Sep 9, 2006
Messages
28
I have a 2004 Mercury 40ELPTEFI motor that idles at about 1200 to 1500 in the water. How do I adjust it down? I think it is supposed to ba at about 750.
 

Urbina

Seaman Apprentice
Joined
May 10, 2012
Messages
47
Re: 2004 40HP EFI Idle Speed To Fast

there is a idle screw that controls all the carbs if more than one.
start the engine and start moving it after its warm little at a time.
also keep a eye on your RPM and stop when your in range.
 

bbrnhart

Cadet
Joined
Sep 9, 2006
Messages
28
Re: 2004 40HP EFI Idle Speed To Fast

This is a fuel injected motor not carburated
 

Timestep

Petty Officer 1st Class
Joined
Jul 17, 2002
Messages
204
Re: 2004 40HP EFI Idle Speed To Fast

I had this on a 30efi. I had to get the Mercury guy to plug in his computer, then change a part.

Dave
 
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