Is this normal on a triple engine boat?

[fishman 77]

New to running a triple engine boat. I have been having what I thought was a throttle issue since the boat was new. But now I am being told it’s normal. The boat has 300 HP Verados and is a 2011. The explanation is how the engines work in shadow drive. A description of the issue is below.
The throttles behave fine when the sync button is enabled. The problem is when the synch button is not engaged. With the throttle heads equally pushed down throughout the entire RPM range the center and port engine are constantly about 150 - 200 RPM's higher. If I move the stbd throttle head further forward the engine catches up but the throttle heads are not aligned. When in synch, or single lever mode the throttles perform fine and all engines synch, the engines also idle at the same RPM.
Does everyone else boat do this? I am told that the port follows the center engine, they call it shaddow drive and it has something to do with the center engine being deeper in the water. I would think this slows the two down, not speed them up. Anyway the explination does not make sense to me.
Is this true?

[Jimmypop]

Scott,

Give me a call when you have a free minute...800.544.8909 (daytime).

Thanks,

James

[TwentyFourSeven]

The rpm's on the center motor will be higher if you trim it up the same as the outside two engines. I run my center engine at 1.8 and the outside engines at 2.8

[fishman 77]

Actually turns out I had a bad throttle. One of the pots had slipped. Got to the point where the stbd engine would not even shift. Anyway replaced and it runs great now.

Also got a quick driving leason from Wylie this summer that helped a bunch. I now do the same thing you said above.