2012 Mercruiser 3.0 MPI Spark Plug Change

KPLATZ

Recruit
Joined
Oct 28, 2019
Messages
1
Hi,

Does anyone have any advice or a good diagram on what needs to be removed to change the spark plugs on a 2012 Mercruiser 3.0 MPI? I can see the first two plugs pretty easily, but the third and fourth ones are pretty hidden but a bunch of cables.

Any help would be appreciated.
Thanks
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
51,368
pull plug wire, lefty-loosy the old plugs out, righty tighty the new plugs in....re-install plug wires.
 

QBhoy

Fleet Admiral
Joined
Mar 10, 2016
Messages
8,348
Hi. This engine is quite possibly the easiest of them all to change out the plugs. Are you struggling to get yourself down to them maybe ? You should try a big v8 mpi in a 18ft boat !!
youll manage !
 
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