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I spent hours looking for a MMDC controller with no luck. Decided to install analog gauges.

Looking for Sea Ray Part 1313816 or 1604198, same called a MMDC/Instrument Driver/ Interface QSM11 -ECM to helm gauges. Also labeled Medallion 7006-00000-01. Any 2002-2004 large Sea Ray that converted original helm gauges to Garmin/RayMarine may have this part on an engine bulkhead that was...

Looking for Sea Ray Part 1604198, same called a MMDC/Instrument Driver/ Interface QSM11 -ECM to helm gauges. Also labeled Medallion 7006-00000-01.

Looking for Sea Ray Part 1313816 or 1604198, same called a MMDC/Instrument Driver/ Interface QSM11 -ECM to helm gauges. Also labeled Medallion 7006-00000-01. Any 2002-2004 large Sea Ray that converted original helm gauges to Garmin/RayMarine may have this part on an engine bulkhead that was...

Thanks to all for the suggestions. I may not have mentioned that the 2003 48 SB I have has Digital Gauges via the Cummins ED-X made by SMX. Same has NEMA input from the Cummins ECM. All engine data is available but no "Fuel Gauge Info" is available, only total fuel used.The MMDC and gauges were...

The addition of sensors for analog gauges is a simple task. Oil goes to a "T" on the engine manual gauge. temp in one of several 3/8" or 1/2" bungs at the pump area. Tach goes to either the "W" or "R" terminal on the alternator. The Instrument Interface Module sold by SBMAR is not compatable...

Thanks to all for their endeavors to understand my problem and the easiest way to deal with it. I plan on going to analog helm gauges. The issues are where to put any sensors, as the advice TO NOT USE existing sensors is valid. The one yet to be solved is a temp sender. I see a 3/8NPT plug on...

Have a full set of 4 1/4" Gauges for sale. Same from a 2003 48 Sedan bridge. All worked OK until the MMDC quit. These have the 4 wire connector at the top and are unique to P & S Interest?

As I have explained before, the MMDC was developed by Borg Warner and later made by Medallion Instrumentation Systems They were used by Sea Ray from 2002 to ? to run the large 5" Helm gauges, 4 in 1 and the Tach. The black 6' X 6" box in the engine room gets NEMA from the engines ECM and other...

The three wire connection to the helm 4 in 1 and tach for P & S comes from the MMDC that is connected to the QSM11 ECM via NEMA and also the fuel senders.The three wires are Gnd/7VDC for power and the "CAN" data wire plus the light wire. All 4 gauges are unique to P & S, with the "CAN"...

Believe that the QSM11 engines in fact have sensors that show resistance to ground for Oil Pressure/Temperature.in addition to sensors that go to ground for fault purposes. Believe injector control is not based on Oil Pressure or Temperature. The engines talk to the MMDC via NEMA from their ECM...

Believe that the QSM11 engines in fact have sensors that show resistance to ground for Oil Pressure/Temperature.in addition to sensors that go to ground for fault purposes. Believe injector control is not based on Oil Pressure or Temperature. The engines talk to the MMDC via NEMA from their ECM...

Also likely a bad MMDC module, same not available, can switch to analog gauges but costly and a lot of work.

Likely a bad MMDC, part not availible, can switch to analog gauges, but a lot of work/money.

MMDC on a 2003 48 Sedan Bridge with Cummins QSM11 engines quit, - same not available. Would like to replace with analog gauges. MMDC input shows engine input as Red White twisted pair+ & - or NEMA, plus a white wire Tach?. Inputs for Ignition both switch and key are known along with fuel...

MMDC on a 2003 48 Sedan Bridge with Cummins QSM11 engines quit, - same not available. Would like to replace with analog gauges. MMDC input shows engine input as Red White twisted pair+ & - or NEMA, plus a white wire Tach?. Inputs for Ignition both switch and key are known along with fuel...

MMDC on a 2003 48 Sedan Bridge with Cummins QSM11 engines quit, - same not available. Would like to replace with analog gauges. MMDC input shows engine input as Red White twisted pair+ & - or NEMA, plus a white wire Tach?. Inputs for Ignition both switch and key are known along with fuel...

Recently bought a 48 Sedan bridge with 616 Cummings-2 1/2' shafts/ 28X32 props. Notice more shudder than previous boat, a 450 Dancer 420Cats-1 1/2" shafts and 22X23 props. This is only at a dead stop, does not appear when underway. Also the shudder is more pronounced in STBD/FWD and...

The gear engage shudder existed before and was the same after the yard work.

Recently bought a 48 Sedan bridge with 616 Cummings-2 1/2' shafts/ 28X32 props. Notice more shudder than previous boat, a 450 Dancer 420Cats-1 1/2" shafts and 22X23 props. This is only at a dead stop, does not appear when underway. Also the shudder is more pronounced in STBD/FWD and...