OM Diagram... Sedan Bridge 420 2005.. some one know how to find this?

Sergio Bravo

New Member
Dec 12, 2009
4
Peru, South America
Boat Info
Sea Ray 240 Sedan Bridge 2005
Engines
Two cummins 6CTA 8.3 M
Hello everyone.
I´m looking for Diagrams of the OM of my SeanBridge 420 (year 2005).
some one knows how to obtain that? some one have one?

Regards,

Sergio
 
I´ve got there.. theres a lot information but theres no many information of the OM. I mean the Mercruiser components...
You know who can assist me in Mercury?
I´ve problem posted since one month.
Both engines don´t go more than 1500 RPM.. they are cummins 6CTA 8.3M, they are suposed to be al lesast 2600 rpm....
They run normaly at 2650 RPM, then I´ve mechanical problem in one engine, then solve it... and now they both don´t run again.
I think it´s an electronic "save mode" that is not in the ECM of the Engines it may be in the OM.

1 month with this problem, the Cummins rep in Peru don´t get the trouble... here are not many electronic technishans.

I´m getting crazy.

Sergio

sergio
 
I'm so glad my truck doesn't have nearly the amount of electronics that all the newer stuff does.:wow:

I'll offer some basic advice. Maybe it'll help, maybe it won't - as it's affecting both engine, I suspect maybe not.

Are you getting good air and fuel?

What's the condition of your fuel filter and air filter?

Do you know the condition of your fuel? Is it old? This would be the only thing that my "non-electronic brain" can think of that would affect both engines. :smt001

Just out of curiosity - is this "OM" some kind of main computer? And, are both engines being limited at exactly the same RPM?

On edit: Give it a little time and I'm sure some guys/gals that have more specific knowledge will respond.
 
Last edited:
Your engines are in the "limp home mode". For some reason, most likely a bad or intermittantly failing engine sensor (temp, oil pressure, crank position, etc.), the engine control module has registered the fault and is limiting your RPM's. The fix is usually to reset the engine computers then diagnose the faulty sensor. This takes a trained Cummins mechanic and access to the Cummins system via laptop.
 
On edit: Give it a little time and I'm sure some guys/gals that have more specific knowledge will respond.

And there you go! While I was typing my edit response, none-the-less! :grin:
 

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