Thanks, well my RPM/temp/oil gauges don't work
the speedometer and fuel are the only ones that work
so there's another issue I need to work on, getting my gauges to work
. It is equipped with MSD ignition, and Wilkes told me my alternator belt is too big therefore will slip at high RPM which does not create enough current that the MSD requires, so that was one of the "minor fixes" (right size alternator belt, secure battery better than it is, check distributor cap for corrosion). As far as the pump he said my wear ring may be worn out so since that would be replaced that I should just do a rebuild(quoted at roughly$750-$1000 parts and labor).
The two gauges you really do not need work that bites. You really need the Tach/temp/and oil pressue to work. They are your motor's life line. I would fix them asap and then take it for a spin and see what the motor is doing.
Since the tach is not working what does the motor sound like at 25/30?? lots of rpm or not so much? The pump is an issue possibilty (most likely) it is a jet boat and often over looked by alot of people. Remember the power is in the pump