oreo11zeus

Looking for the part number for the vacum/map sensor on top of the plenum - its visable from up top = Would apreciate it if someone could look before I start mapping it out with Tyler Crocket - I want to make sure the right one is one the motor -

Hot Duck

Try the Mercury parts area on the Bam Marine web site. They have some nice exploded diagrams to work from to be sure you have the correct part numbers. I have used it and have ordered parts from them several times with great success.

http://www.mercruiserparts.com/mercruiser_parts.asp

Hot Duck

Here is a more specific link for the 525EFI.

http://www.mercruiserparts.com/selec...oc_nbr=525+EFI

oreo11zeus

Thanks Bro but its must be an earlier SENSOR, MAP, Manifold Absolute Pressure - maybe a 500 = MEFI II

trayster

Hey dudes, newbie here to the sight. Already benefiting from it.
I've got a tach issue on one of my 525 efi's where it went dead from getting waked at the back which is pretty low already, I've read that the MAP can mis read if gotten wet.
I'm going to check that out, but are there any other deals back of the motors that can take down a tach, I've check the tach it's good.
Thanks very much. The last go fast I had had 500 carb motors so like everything else the new world is plug and play.