r.p.m. gauge working?

[redrockerbassnutt]

i bought a new boat with a 90 4 stroke and when running wide open the tach. is buried past 7000.,(motor trimmed up or down).how accurate are the gauges?

[jmwldcat]

they mostly work well but i had this problem also and when i took it back they found a wire crossed in the wiring harness. they fixed it and it worked fine...hope this helps..joe