1993 Canados with MAN d2842lze; cruising speed?

What s the rated RPM for these engines? Do they reach rated RPM at WOT?

I had egt and boost gauges put on my mans and am under egt is under 600 at a 2050-2100 rpm cruise. With everything clean max wot is 2400. But I have a concern that the location of my temp probe not in the right place to correctly measure egt. Would appreciate any comments on the location of my probes. Picture attached. Thank you.

I don’t have the electronic displays just VDO gauges. So don’t know the load.

Short answer is yes, 2000rpm is ok, in principle.
The instruments of your boat only allow you to check the cooling liquid temperature.
And what MAN operating manual says about it is "80-85°C, temporarily 90°C allowed".

Trouble is, engine cooling liquid doesn't tell you the full story, as others already mentioned.
But when MAN fitted those engines (which btw are rated for 1,100hp @ 2300rpm, to answer Pascal question), no pleasure boat was equipped with EGT probes - not to mention load, which can only be calculated theoretically, on mechanical engines.

Otoh, Canados fitted straight transom exhausts, whose backpressure is pretty low, so EGT shouldn't be a major concern, as long as the engines are not overheating (see previous MAN indication), and not overloaded (excessive weight, dirty hull and/or propellers).
But this can be easily checked by running her at WOT now and then, just to check that the engines temp still remain within the above temp limits and that both engines reach the rated max rpm of 2300, regardless of speed.

All that said, there's no reason to consider 20 kts @ 2000 rpm as THE cruising speed.
Your Canados is steadily on the plane already at 16 knots or so, therefore you might as well cruise well below 2000 rpm, when not in a hurry.
Besides, a good friend of mine with the same boat and engines nowadays cruises almost always at 10 knots or so, after retrofitting the boat with fin stabilizers.
An alternative worth considering, in a boat whose hull, even if designed for planing speed, is very stable and comfortable also when not on the plane.

Your location is correct, and is in fact the same where I am considering to retrofit EGT thermocouples on my engines.
The alternative would be to place them upstream of the turbos, but there's nowhere to fit them, on those engines.
And also the mandatory initial tests prescribed by MAN upon commissioning of new boats were done on post-turbo EGT, anywhow.

PS: my only suggestion would be to fit a probe on both cylinder banks of each engine, for the reasons discussed in another thread.

Apples and oranges.
As I'm sure you know, your hull is much more demanding in terms of engine load at any rpm, compared to a boat like a Canados.

If they turn 2300 rated rpm then 2000 is ok. That said I always like running around 1850/1900 on 2300 rated engines. Assuming the boat is fully on plane of course

It shouldn't, also because if you are talking of a check that you made recently, it can only get worse - possibly MUCH worse - when the sea water temperature will increase during the summer.
When is it the last time the heat exchangers were cleaned?
Regardless, it's probably time to open them, pull out the tube bundle and clean them thoroughly.
And while you are at that, check for potential corrosion on the shell seat where the large OR under the side cover goes.
That's critical, because that OR has a double function, sort of: avoid external leaks on one hand (which are easy to spot, if any), but also avoid internal leaks/exchanges between the raw and the cooling water (which are more critical).