Originally Posted by manyboats
Since your information in your avitar space is quite skimpy I don't know what kind of boat you have so 2000rpm and 7 knots is a hard pice of information put to use.
Camano Troll. It's either 28' or 31' depending on if you're renting a slip or bragging. 10.5' beam, supposedly "semi planning". It will go 13 knots at WOT if I remove all the stuff my wife has added over the years.
Actually, the owner's manual suggests establishing an initial WOT speed and then seeing if that speed can be reached from time to time as a test of the bottom, running gear and engine.
As for the OP's low speed, engine problems can have an effect on speed as well as the running gear and bottom condition. Simple things like restricted air or fuel flow as well as more complicated issues.