Is it possible to get separate temp readings from each head? I know smartcraft averages them but I would like to know separate readings to more closely monitor the T-stats.
Is it possible to get separate temp readings from each head? I know smartcraft averages them but I would like to know separate readings to more closely monitor the T-stats.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bloodman »</TD></TR><TR><TD CLASS="quote">Is it possible to get separate temp readings from each head? I know smartcraft averages them but I would like to know separate readings to more closely monitor the T-stats.</TD></TR></TABLE>
This "can" be done with a DDT, or the Computer Diagnostic System.
Outside of that, an "average" temp is what you've got available.
One thing to note: The "average" setup works quite well with Smartcraft. On 3 liter models.... if a thermostat is sticking "open".... you will NOT reach 120 degrees at idle (many times, you're lucky to reach even 105 degrees).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
I have a boat with a 2.5xs on it. The water temp gauge was never hooked up. I bought a Merc System Monitor gauge to give me lots of info. The problem was I still had a water temp gauge in the dash that didn't work. I built a bracket, so the temp sending unit would screw in and butt up tight up against the head. It worked great, I now have water temp with the Smartcraft gauge and the head temp with the other gauge. You could add one to each head if you wanted to.
Its interesting to see the water temp come up and the head temp lag behind. Same thing happens when you take off, the water temp comes down, but it takes a little while for the head temp to drop.
Mercury 200hp V6 DTS #2B590854
Thats kinda what I'm looking for. I am wondering if there are any other locations in the block where this could be mounted say to monitor inner block temps or something.. Would you have a photo of your unit?
Sorry I don't have a photo, next time I go to the lake I'll take a photo of it if you want.
Mercury 200hp V6 DTS #2B590854
Ya, that would be great. Nice idea too.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Baja 252 »</TD></TR><TR><TD CLASS="quote">I have a boat with a 2.5xs on it. The water temp gauge was never hooked up. I bought a Merc System Monitor gauge to give me lots of info. The problem was I still had a water temp gauge in the dash that didn't work. I built a bracket, so the temp sending unit would screw in and butt up tight up against the head. It worked great, I now have water temp with the Smartcraft gauge and the head temp with the other gauge. You could add one to each head if you wanted to.
Its interesting to see the water temp come up and the head temp lag behind. Same thing happens when you take off, the water temp comes down, but it takes a little while for the head temp to drop.</TD></TR></TABLE>
The "lag" you see is because the sending units are mounted EXTERNALLY. The "water temp" sending units are mounted INSIDE the cylinder head, and are acutally reading water temp in the cylinder head. Hence, they reflect temperature variances more rapidly.
Not knocking your idea.... it's been done for many years (although the accuracy of this type of sender setup is always questionable).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EuropeanAM »</TD></TR><TR><TD CLASS="quote">
The "lag" you see is because the sending units are mounted EXTERNALLY. The "water temp" sending units are mounted INSIDE the cylinder head, and are acutally reading water temp in the cylinder head. Hence, they reflect temperature variances more rapidly.
Not knocking your idea.... it's been done for many years (although the accuracy of this type of sender setup is always questionable).
</TD></TR></TABLE>
No problem Don, I know your right. I had a extra hole in the dash, so I put the water temp gauge in. I didn't want the gauge to read nothing, so I hooked the sender up externally. When I want accurate info I look at my system moniter.
Mercury 200hp V6 DTS #2B590854
Is it possible to use the current temp probes to split the readings??????
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bloodman »</TD></TR><TR><TD CLASS="quote">Is it possible to use the current temp probes to split the readings??????</TD></TR></TABLE>
That's going to depend on WHICH ENGINE you have.
However.... with ANY of the Optimax models (and most of the later EFI models), this is NOT a possibility. Anything tied into the sensors will alter the resistance value (and the resulting voltage the PCM "sees", which will result in inappropriate fuel delivery).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Gotcha. Thanks again Don.
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