2005 350 mag (5.7) smartcraft faults Water pressure + fuel level sender

[achris]

Nope. One is low pressure the other higher.

 

[alldodge]

I'm finding that 8M6000626 is NLA and 8M6000623 is used on most all the new motors and are water pressure, the T11 is oil pressure

Maybe Fun Times can and some clarity

 

[Fun Times]

Found an old post that has some good detailed info regarding the two sensors in question...The posts are towards the end of page 2 then 3...., https://forums.iboats.com/forum/engi...ressure-sensor

Below are just some quick reminders of the info inside the topic above for those of us that may recall some of it plus I'm going to put these into the Merc stickies to help keep better track of all this.
https://www.ebay.com/itm/OE-8M600062...M8AAOSwO9RbAle P

8M6000626 looks to be made by Air Handler...8M6000626 Air Handler Pressure Sensor For Mercury Marine Quicksilver Genuine

https://www.ebay.com/itm/Mercury-Mar...ue&rt=nc&_trks

The 8M6000623/881879010 Water Pressure Steering Cooler Sensor is used on many Mercury Marine and Mercruiser engine models. MotoTron also used this sensor across many customer applications. This sensor is a 0-50 PSI, with a burst proof pressure rating of 100 PSI and a rated burst pressure of 325 PSI. Vout = 0.08 (PSI in Absolute) + 0.5. This sensor supersedes 881879-3. Sensor 881879-10 will also work as a replacement to 8M6000623.
These sensors are very robust. I have seen on applications where these sensors are mounted on closed cooling heat exchanger on Mercruiser engines where excessive static charge built up on the tank due to the flow of water and routing of spark plug wires, energy would dissipate through sensor and cause the sensor to fail. Make sure your heat exchanger is grounded!...http://vi.vipr.ebaydesc.com/ws/eBayI...1&secureDesc=0

The 881879T11 Oil Pressure (0 - 100) sensor is used on many Mercury Marine and Mercruiser engine models. MotoTron also used this sensor across many customer applications. This sensor is a -4.7-100 PSI, with a burst proof pressure rating of 150 PSI and a rated burst pressure of 500 PSI. Vout = 0.04 (PSI in Absolute) - 0.088. I added the pin out of this sensor in pictures area so that you can diagnose your sensor prior to replacing it.
http://vi.vipr.ebaydesc.com/ws/eBayI...1&secureDesc=0
https://www.ebay.com/itm/Mercury-Ma...vip=true&rt=nc&_trksid=p2047675.m43663.l10137

https://www.neweagle.net/support/wik...-and-Acutators

 

[spunkyman]

Thx Fun Times !! Great detailed explanation !! When selling the oil sensor, 881879T11 or 8M6000626, most sellers call them a water pressure sensor. This clarification will tell me that regardless of the sellers discription, it is indeed for oil, in this application.

 

[alldodge]

I think you or I missed something

881879T11 is the oil pressure sensor

8M6000626 is a water pressure sensor which is NLA from Merc and replaced by 8M6000623

 

[Fun Times]

8M6000626 looks to be made by Air Handler... Air Handler Pressure Sensor For Mercury Marine Quicksilver Genuine

Correcting myself here as saying the sensor Made By Air Handler isn't right... Old (NLA) # 8M6000626 sensor is/was also Used In the Air Handler Assembly of certain types of outboard model engines. The better improved number that seems to do more is 881879T11. https://www.perfprotech.com/sensor-pressure-881879t11/product/196154

With that mentioned plus your quote below of sensor # 881879T11 description of Oil and Water; 'I'd go out on a limb to say that if you bought (2) 881879T11 sensors for both water and oil it ought to work on your engine model for both sides due to the fact this sensor in question can be found in many areas depending on where one would look for it's uses.

While Mercruiser standard factory doesn't directly say under your engine model/year, etc., that sensor 881879T11 can be used on the water side; 'Like yours is, this same sensor number can be found mounted on the water side of an engine Oil Cooler too which is used on and by Mercury Racing engines / their division which they are known to due some things just slightly different but works just the same as OEM....< Please bear in mind that this is only a guess on my part. Your mileage may vary because this ain't "by the book" .

Sensor # 881879T11 is also used as an water Pitot Sensor Kit, 881879A22 (Boat Speed) which is why you see it claimed as a water psi sensor and it is also used as an Fuel Rail Pressure Sensor.

Senders And Sensors,https://www.perfprotech.com/sensor-pressure-881879t11/product/196154
Senders And Sensors

The reason Mercruiser suggests using 8M6000623 for water and 881879T11 for oil would be as mentioned above regarding different psi values for better accuracy as the water pressure may max out around 30ish psi while oil gets closer to 80ish psi at times.

Merc also has sensor # 8M6000628 rated for 30 psi. Item number 50, https://www.mercruiserparts.com/bam/...1375/14332/170

When selling the oil sensor, 881879T11 or 8M6000626, most sellers call them a water pressure sensor. This clarification will tell me that regardless of the sellers description, it is indeed for oil, in this application.

 

[spunkyman]

Thanks again FT for the clarification !
I ordered one of each 881879T11 (8M6000626) for oil AND 8M600623 for water. I also have a pitot error on my Smartcraft Tach ... i was going to ignore, but if you know where the sensor is... that would help !

 

[Fun Times]

What boat model do you have?

Could we see an overall view of the backside of both your old and new gauges along with an overall view of the front side of both too?.... Mainly need to see the wiring harnesses / connectors coming in from the engine to the helm for all of them to try and figure out what you're working with.

How sure are you had and now have a complete smart craft system?

Some of the newer analog gauges are now coming with weather pack type connectors that could resemble a smart craft connection so I just want to be sure you're heading in the right direction is all. Have a link or part number to the gauge/s you bought?

To connect a smart craft you'd have to have say either a CAN data wiring harness from the engine to helm gauge and/or possibly mercruisers junction boxs at the helm to help connect additional smartcraft gauges.

An example of a type of wiring harness you may be looking for in your boat,
https://www.ebay.com/sch/i.html?_fr...cat=0&LH_TitleDesc=0&_odkw=mercruiser+harness


I just reread your questions and if all turns out connected correctly then you ought to be able to turn off the faults you're seeing as long as they are not actually connected which most of the time most of the ones you're showing weren't connected to a high number of boat models but that doesn't mean yours wasn't connected from new.... The only way to really know is to have a look at the three sensors themselves.
- Trim position sensor
- Pitot sensor
- Fuel level sensor

The water pressure sensor should be mounted to the oil cooler at the back as mentioned earlier and would need to be addressed as long as you truly have a correctly connected smart craft gauge system......< If not you'd need a marine scan tool to help with this and all others giving you a hard time to know for sure.

Depending on gauges you have; 'Below would be an example of how to turn off the 3 sensors in question.

Setting the External Sensors The external sensors menu turns a number of sensors off or on. These include sea temperature, trim, GPS, speed, steering, and tabs. The external sensors menu also can change how the speed is recognized; pitot, paddle wheel, GPS, and at what speed the transition to a different sensor occurs. The type of pitot sensor can be changed from 689 kPa (100 psi) for most vessel applications, to a high‑speed 1379 kPa (200 psi) sensor. A high‑speed sensor must be installed for an accurate speed to be displayed when the 1379 kPa (200 psi) is selected. 1. While in the "Main Menu," press the "–" or "+" button to highlight the "Settings" menu. 2. Press the "MODE" button to enter the "Settings" menu. 3. Press the "–" button to highlight the "Ext. Sensors" menu. 4. Press the "MODE" button to edit the "Ext. Sensors" menu. 5. Press the "MODE" button to turn the "Depth/Seatemp" option on ("Yes") or off ("No"). 10.Press the "MODE" button to turn the "Use Paddle" option on ("Yes") or off ("No").

^^^The list of things to do goes on and on...Hopefully you received an operational manual with your gauges??

Generally speaking if your boat model did use the steering angle sensor, Pitot, Fuel level, trim sensor then you should find something mounted at the rear inner transom plate bolts close to the steering arm actuator that resembles the images of parts in the following link. Even the smart craft fuel tank sensor would connect to what is called an transom wiring harness also mentioned in the link, https://www.mercruiserparts.com/bam/subassembly/31818/11746/295

Again you have both sensor designs mounted to your MPI engine because the ECM needs to see/read a digital signal sensor while most boats back then still used analog signal type gauges that needed analog sensors....That mentioned the smart craft gauges uses/reads the digital signal sensor that the ECM reads.... Both design sensors uses different types of wiring connections.
Digital signal uses a different wire plug connector vs the analog wiring plug connector....< That is unless you have an Mercruiser analog to digital interface box connected up someplace such as any of these,? https://www.ebay.com/sch/sis.html?_nkw=MERCURY+SMARTCRAFT+ANALOG+GAUGE+INTERFACE

 

[spunkyman]

I have a 2005 Sea Ray Sundeck 240. The original engine was a 5.0L Mercruiser and I replaced it with a 350 MAG long block. I also replaced the gauges with the EXACT gauges it came with. It's always had 3 Smartcraft gauges, (Tach, 4in1, and speedo) I've replaced the wiring to the exact part no. including the blue cable (Ouciksilver 84-879982 A30) that goes from TACH to main wiring harness to the ECM. It has a SmartCraft SC1000 TACH, an SC100 4 in 1 AND the speedo wasn't changed.

I found the oil pressure and water pressure sensor locations and have both parts enroute to me. Should be here tomorrow.
I definitely have the transom harness 84-865677T01. I see there's nothing plugged into some of those connectors. I will double check on the A/D converter box.... but I believe I always had smart craft/ ECM. I was the one who changed them.

When I replace the water pressure and oil sensors, and a few other things, I'll report back and I'll provide some pictures.
Many thx !!

 

[spunkyman]

OK.. some clarification. I unplugged my oil sensor and it went down to around 50 PSI on the meter with nothing plugged in AND now have an oil fault on ECM which is good... means wiring is working because it is now disconnected. I'm pretty sure it's the actual oil sensor and that comes in today ...hopefully it regulates to normal after installing NEW.
I've taken pics of the rear port side of engine with a box located there that reads 599 4F15 (google gives me nothing!).

I do have my SC1000 manual and will tackle that with the existing errors (Fuel level sensor, trim position and Pitot)
I still have my old gauges and I believe them to be compatible.... I will post pics.

I also may have been wrong on the transom harness.... it's called a MULTI ENGINE POWER DISCONNECT and has some loose wires with nothing plugged in (i know i could not need them) just looking for clarification.

 

[alldodge]

Orange/White = digital trim
Orange/Blue = analog trim
Blue/Brown = over temp or lube bottle (not really able to tell what the color is)
Black = ground

 

[spunkyman]

On another note, Do you know what the difference between ECM0713 350 MAG software of 8M2003678 and 8M2003680. Are they compatible with each other. if they are, this could save me $1600 !!!

 

[alldodge]

Sure don't but maybe Fun Times does

 

[Fun Times]

Okay thanks for the details regarding your boat and gauges, etc.. Somehow I had a feeling you had a SeaRay just going by some of the things you were mentioning... Around that timeframe sea ray was trying to advance their technology a bit quicker vs some of the other similar type boat models like four winns, chaparral, etc. by changing up the wiring harness connections like you're seeing...Sea Ray did a bunch.


I see you do have the smart craft gauges which looks to include the speedometer too as I located your "Boat" parts catalog online and page 23 shows your gauges.
Below are 2 that you may want to keep on file....The first link is the boat parts.
http://rnr-marine.com/images/Sea-Ray_240-Sundeck_2005_Parts-Manual.PDF
Sea Ray Boats 240 Sundeck Owner's Manual Supplement

240 SUNDECK 2005
INSTRUMENT PANEL
1775599 1PANEL, BLANK:240/270SD-05 INST METCHRY (HULL#3004->UP) 1689917 2GAUGE, LINK SPEED 3" S-CRFT 0-70MPH (HULL#3004->UP) 1690381 NUT, LOCK 85MM SPIN LOCK VDO (HULL#3004->UP) 1727800 PITOT, S-CRFT SPEEDO KIT SML BLOCK (HULL#3004->UP) 1768244 3GAUGE, 5" 4-IN-1 FUEL/OIL/TMP/TRIM S-CRFT (HULL#3004->UP) 1777617 4GAUGE, SYS TACH 3" S-CRFT 0-7000RPM RV2 (HULL#3004->UP) 1752433 5PANEL, BLANK:225WE/240SD/270SD-04 INST STD (HULL#3001->3003) 1689853 6GAUGE, FUEL LEVEL S-CRFT 2" (HULL#3001->3003) 1690380 NUT, LOCK 52MM SPIN LOCK VDO (HULL#3001->3003) 1690031 7GAUGE, ENG TRIM S-CRFT 2" (HULL#3001->3003) 1690380 NUT, LOCK 52MM SPIN LOCK VDO (HULL#3001->3003) 1754755 8GAUGE, SYS TACH 3" S-CRFT 0-7000RPM RV1 (HULL#3001->3003) 1690381 NUT, LOCK 85MM SPIN LOCK VDO (HULL#3001->3003) 1689852 9GAUGE, OIL PRESS 100 PSI S-CRFT 2" (HULL#3001->3003) 1690380 NUT, LOCK 52MM SPIN LOCK VDO (HULL#3001->3003) 1689851 10GAUGE, TEMP 250F S-CRFT 2" (HULL#3001->3003) 1690380 NUT, LOCK 52MM SPIN LOCK VDO (HULL#3001->3003)
NOT SHOWN
1507243 HARNESS, MERC DATA S-CRFT 1000-2RSL-20' 1777915 HARNESS, 240SD-05 WIRE W/S-CRFT W/CONN (HULL#3003->3718)

I think you may want to explore having your 5.0 ECM reflashed to the new 350 MAG MPI as it should cost you less $,,,,https://obd2allinone.com/mercecms.asp

Also knowing you really have the smart craft system now I don't believe you should have to be using the wires in your hand as you should have a wiring connection that runs to your engine and plugs into one of the other connectors located on the engine usually around the rear of the engine block.

The one photo you show with the heat sink and black plug connector into a module should be for your ignition coil system such as these for example, https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=8M0054588&_sacat=0

 

[Fun Times]

? Does your steering wheel have the SMARTCRAFT TOGGLE & FUNCTION SWITCH mounted to the wheel?
See around pages 39 in the parts book and read parts not shown too.

 

[spunkyman]

will check the steering wheel tomorrow... I should clarify my ECM issue.. I have the correct ECM for the 350 MAG - I bought it new. BUT.. I also have a used one I bought that is off by 2 numbers on the software.... just wondering if the difference matters, or if BOTH might work, cause I can return the NEW one and use the USED one that was a lot cheaper ! Just want to know if they would both work (which I believe they will) but what is the actual difference between the two.
(I have 8M2003680 which is what Merc says is the proper for my engine, but also have 8M2003678 which is a used one I have. The only difference is the last 2 numbers) Any idea what the difference is? I can't seem to find anything out there ! Neither of these are from the 5L. It's long gone ! These are both for the 350 MAG

 

[Fun Times]

Sorry but I can't tell what 8M2003680 and 8M2003678 would fit exactly as there isn't a description but I do see they are both No Longer Available...https://www.mercruiserparts.com/8m2003680-ecm ... https://www.mercruiserparts.com/8m2003678-ecm

Maybe muc Could try running the 2 numbers to see if there was a past engine model description somewhere along the line ?.
Another option to try would be emailing Merc with the 2 numbers to see if they have their list handy that these may fit, https://www.mercurymarine.com/en/ca/...mer-assistance

I just read your ECM problem ! Swap 2004 Mercruiser 5.0L to a 2014 5.7L block. (2005 Sea Ray Sundeck 240) and 2005 ECM for 5.0L to 5.7 350 MAG upgrade. Topics.

The sensor differences between most of these ECM's you're buying is important and the last member farmit in one of those topics put it well...Being yours is an 05 year model, I'm pretty sure yours doesn't utilize the CAM sensor sticking out of the distributor housing as that started in 06 I believe it was. Also I'm thinking you have the 10 pin wiring harness cannon plug and not the 14 pin plug which has a difference in all this for working or not...Plus a few other differences should be at play too.

The CAM sensor differences between ECM's is probably the main reason here that you can only keep the engine running for 5 seconds.

Out of each side shown in the following link, What design wire harness plug does your boat use ?, http://www.michiganmotorz.com/mercru...lug-p-311.html

To bad you sold your original ECM as this shouldn't be this difficult as long as everything else was connected up correctly and truly known to be running properly.

You mention Merc said one of the ECM part numbers above will work...Was that from the factory support, dealer or online? Is there a date on either one of them ECM's as I don't think I saw you mention that yet ?

Is there any way to possible track down the engine serial number the used ECM came off of say by the seller?

The proper ECM part number really ought to be 865840T02, https://www.perfprotech.com/mercury-...0?umodel=23627
ECM, Engine Control Module (#865840T02)
Comment: (350 MAG MPI Bravo)(Standard Cooling)
Supersedes: 865840T01

My guess for 8M2003678 and 8M2003680 would be one's for closed cooling vs standard or one's for stern drive and the other for Inboard (MIE)...Also 8M******* sort of suggests it's possibly a newer/later dated ECM vs the 2004/5ish you're in need of.

What area do you live in?

 

[spunkyman]

Sorry but I can't tell what 8M2003680 and 8M2003678 would fit exactly as there isn't a description but I do see they are both No Longer Available...https://www.mercruiserparts.com/8m2003680-ecm ... https://www.mercruiserparts.com/8m2003678-ecm

Maybe muc Could try running the 2 numbers to see if there was a past engine model description somewhere along the line ?.
Another option to try would be emailing Merc with the 2 numbers to see if they have their list handy that these may fit, https://www.mercurymarine.com/en/ca/...mer-assistance

I was told straight from MERC support through a dealer, confirmed that the proper ECM is indeed part no. 865840T02 which I bought brand new and it has the 8M2003680 software number stamped on it. My "other" used ECM for 350 MAG I bought on a whim before I knew what I actually needed, just happens to be identical, EXCEPT for the last 2 numbers, which are "78" (as in 8M2003678). So, Im wondering if I can use the 78 rather than the 80, as I can return the 80 ! If not, Then I will keep the new one (80)

I just read your ECM problem ! Swap 2004 Mercruiser 5.0L to a 2014 5.7L block. (2005 Sea Ray Sundeck 240) and 2005 ECM for 5.0L to 5.7 350 MAG upgrade. Topics.

The sensor differences between most of these ECM's you're buying is important and the last member farmit in one of those topics put it well...Being yours is an 05 year model, I'm pretty sure yours doesn't utilize the CAM sensor sticking out of the distributor housing as that started in 06 I believe it was. Also I'm thinking you have the 10 pin wiring harness cannon plug and not the 14 pin plug which has a difference in all this for working or not...Plus a few other differences should be at play too.

The CAM sensor differences between ECM's is probably the main reason here that you can only keep the engine running for 5 seconds.

I don't have this .... the reason my engine didn't run was NOT ECM related as much as it was the MAP sensor !! My engine now runs in neutral, on the hose at 500-600 RPM without any issues (either than my oil pressure staying at 80PSI regardless of what I do - but my new sensor is in and I will change that out when the rain stops !)

Out of each side shown in the following link, What design wire harness plug does your boat use ?, http://www.michiganmotorz.com/mercru...lug-p-311.html

To bad you sold your original ECM as this shouldn't be this difficult as long as everything else was connected up correctly and truly known to be running properly.

You mention Merc said one of the ECM part numbers above will work...Was that from the factory support, dealer or online? Is there a date on either one of them ECM's as I don't think I saw you mention that yet ?

Is there any way to possible track down the engine serial number the used ECM came off of say by the seller?

Unfortunately, NOT ....i bought it last summer on eBay.

The proper ECM part number really ought to be 865840T02, https://www.perfprotech.com/mercury-...0?umodel=23627
ECM, Engine Control Module (#865840T02)
Comment: (350 MAG MPI Bravo)(Standard Cooling)
Supersedes: 865840T01

My guess for 8M2003678 and 8M2003680 would be one's for closed cooling vs standard or one's for stern drive and the other for Inboard (MIE)...Also 8M******* sort of suggests it's possibly a newer/later dated ECM vs the 2004/5ish you're in need of.

What area do you live in?

I live in Ottawa, CANADA !! But I was in Louisville, KY last weekend for the Bourbon and Beyond festival !

To summarize... guy at Merc in WI told me that I have the correct ECM. My boat is running now, quite nicely after replacing 7 sensors, but if i could use the other used ECM, that would save me a lot of $$$ - if 78 works the same as 80, that would be fantastic.

I will check several things tomorrow and check back with pics !! But I believe that I will be good to go once I change out the oil pressure sensor and a few little things you've mentioned.... I will also plug in the "other" ECM and see if it runs !

Thx again so much for all the guidance !!

 

[muc]

Sorry but I can't tell what 8M2003680 and 8M2003678 would fit exactly as there isn't a description but I do see they are both No Longer Available...https://www.mercruiserparts.com/8m2003680-ecm ... https://www.mercruiserparts.com/8m2003678-ecm

Maybe muc Could try running the 2 numbers to see if there was a past engine model description somewhere along the line ?.

Those part numbers are not available to USA dealers. Maybe a Canadian dealer could run them through the EPC and tell you what applications they are for.

Both part numbers are still active.

 

[spunkyman]

Here's where we are at ...

OIL PRESSURE - with changed gauge and oil pressure sensor now reads mostly 100 PSI while running and simply with key turned on. Goes to zero with the key off, but when I rev the engine up to 1500 RPM, it goes down to about 50 PSI depending on how much I increase the RPM. Back to neutral and it's back up to 100 PSI (my other gauge read it as 80 PSI) Both ways, it's too high ! But engine runs really nicely..... could this be that one of the leads on the wiring isn't making contact or is it more something with having the old analog sensor on and the digital one with a T... should I remove analog and T and just screw the digital one (8M6000626) directly to the block? I know that something is working, because when I unplugged the sensor, I got a SmartCraft Fault on my TAC - OIL SENSOR NOT WORKING - so i plugged back in and that went away, but still reading crazy high pressure. BOTH gauges show good temperature and fuel level shows a little gas (which is accurate) Is the analog blue wire having any play in this?

TRIM POSITION SENSOR - found that the wires from sensor at outdrive through transom, were not plugged in and a previous picture I posted with wiring in my hand for trim was the correct home for these wires !! Good new is the gauge responded, bad news is it went directly to UP and then DOWN but no in-between !!! UGH.... I then changed gauges and it only stays in the UP position while being trimmed down.... ??? geez... can't catch a break !.

ECM SOFTWARE - I've posted pictures of my 2 ECM's . The colourful (we spell it like that in Canada!) one is the correct 865840T02 that came straight from MERC Fond du lac, and the other one dated 2013 is the one I got off eBay that is only 2 numbers off software if anyone can further my search... however, if it isn't compatible, I'll just move on. The main point is to get on the water with this boat !!!

At this point, my main concern is the OIL pressure and after that, I would feel confident enough to get her out for a test drive... thx to all who have chimed in at this point... I've learned so much and have felt that I (with your help) can school some of the Merc guys in this town. They aren't nearly HALF as smart as you FunTimes , AllDodge and MUC ...