Honda 90 tachometer setup

[firstlight]

I'm questioning my tack readings...4400 at full throttle. Before changing props (or tack, as the previous owner recommended), I'd like to make sure my tack is set up correctly. On other posts I've read about rectifier pulses and the selector switch on the back of the tack. Can anyone tell me what the correct pulse setting for my '97 Honda 90 would be??