2009 DF90A with 2-4 error Not starting

[GGS972]

Hi,

I'm new in suzuki boat engine.
i have a boat with 2009 DF90A since july.
It works well still october.
I found it partially submerged in October.
It was trimmed and get water up to fuse box approximatly.
We put water out, secured it, change bad fuses, change internal and engine harnesses including fusebox, fuses, relays and capacitor.
But we still have a 2-4 error and engine cranking but not starting.
No current on spark plugs and only two injectors acting (Number 1 and 3)
I swapped injectors. All four are good.
When acting injectors from a computer, all four are working.
I test my CMP and ignition coils on another DF90A. Working good.
Testing another CKP and another ECM on my boat, same result.

Any idea ?
Thanks a lot

[Murray]

Maybe some water has gotten into one or some of the connections and started to corrode inside the plug/plugs? Check every electrical connection, you might have had a electrical connection that was starting to deteriorate and the submerging was “the straw that broke the camel’s back”