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Connecting Cummins/merc to Garmin

Old 03-31-2015, 02:45 PM
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Default Connecting Cummins/merc to Garmin

Wanting to connect the smart craft Vessel view on the QSC 8.3 Cummins to a Garmin 4212,

Which bus and what is involved?
I remember reading about issues with diesels and a tach signal,

Tired of tilting head right to see engine data on display at lower left!
Due to polarization of shades.

Last edited by Capt Odyssea; 03-31-2015 at 03:53 PM.
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Old 03-31-2015, 05:13 PM
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Here's some information off BOE's website.

http://www.boemarine.com/boe-marine-...r-your-engine/
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Old 03-31-2015, 05:41 PM
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Too funny they were my next call!

So, I need a Mercury/Cummins p/n 8M0065207, Mercury Gateway.

No I don't, part discontinued, replaced with84-8M0065208.
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Old 03-31-2015, 07:42 PM
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searching around it seems I need what is called a Gateway,
which connects and converts the Cummins comms. protocol to NMEA2000 for the Garmin unit to display engine data.

anyone here familiar or sell said device?

Seems to be some voodoo involved.......plus how do I get a garmin backbone plug included?
At the Cummins smartcraft Vessel view end there seems to be a Tee needed.
Power for the converter apparently comes from the NMEA2000 side.
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Old 04-01-2015, 05:59 AM
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Mercury NMEA Gateway



NMEA 2000 backbone wiring diagram (replace MercMonitor with NMEA Gateway)

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Old 04-01-2015, 03:16 PM
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So does my single Cummins 8.3 600hp have a merc monitor?
I have the SmartCraft Vessel View display unit, which also displays the Onan Cummins 9Kw genset.
if not, how does the Gateway connect to the Cummins side? I want to keep the Vessel view also.
Can you supply what is needed or recommend someone who can?
In all the reading I'v done there is no definitive expertise authority evident.
Thanks for the help!
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Old 04-02-2015, 12:30 AM
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Originally Posted by Capt Odyssea View Post
So does my single Cummins 8.3 600hp have a merc monitor?
I have the SmartCraft Vessel View display unit, which also displays the Onan Cummins 9Kw genset.
if not, how does the Gateway connect to the Cummins side? I want to keep the Vessel view also.
Can you supply what is needed or recommend someone who can?
In all the reading I'v done there is no definitive expertise authority evident.
Thanks for the help!
This is one of those questions on which it is really hard to get good information. Mercury and Cummins got a "divorce" a couple of years ago.

I spent a lot of time trying to figure this out to get the engine information onto the NMEA2000 network on my boat with Cummins QSBs. You have found the solution, which is to use the Mercury Gateway. There are both single and multiple engine versions so be sure you are getting the right one. It plugs straight into the engine harness and converts the J1939 data to NMEA2000. Then you will need to run a drop cable from your NMEA2000 backbone to the gateway. I am assuming your Garmin plotter is already connected to a NMEA2000 network. If it is not, you will have to create a simple one.

You could do the same thing with a MercMonitor, which is a standalone gauge sort of like the VesselView. It has a NMEA2000 port. But that is more expensive and not necessary to get the engine data onto the network.

Mine works fine and all the engine information such as temperature, oil, pressure, fuel rate, and so on can be displayed on my plotter screens.
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Old 04-02-2015, 05:25 AM
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Originally Posted by Capt Odyssea View Post
So does my single Cummins 8.3 600hp have a merc monitor?
I have the SmartCraft Vessel View display unit, which also displays the Onan Cummins 9Kw genset.
if not, how does the Gateway connect to the Cummins side? I want to keep the Vessel view also.
Can you supply what is needed or recommend someone who can?
In all the reading I'v done there is no definitive expertise authority evident.
Thanks for the help!
Your engine doesn't have a MercMonitor, it will support one if it is plugged in. A MercMonitor or NMEA Gateway (my choice) will plug into the same Junction Box as your Vessel View. Either will then be plugged into your NMEA 2000 backbone. You will keep your Vessel View. We can sell you the part. PM me your email address and phone number and I will have our secretary contact you about payment and shipping. It will take a little longer now because Mercury no longer drop ships parts.
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Old 04-02-2015, 07:59 AM
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PM Sent, Thank you Sir!
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