This problem raised its ugly head this past weekend - the buzzer on the key switch would not shut off and the tach would not work or would stick at some rpm. I could silence the buzzer by turning the key switch off. No issues with the engine running (gravity feed) and restart was fine so I assume lift pump running OK. After I finished sailing for the weekend and found my wiring diagram (at home - stupid) and it looks like either the 10 amp circuit breaker at the cockpit engine panel or the 20 amp CB on the engine are in the circuit for the key switch. I did not reset either one at the time. Previously when the 20 amp CB was not working (need to replace) the engine would not reset. Do you sparkies think it is a simple reset or is there something else to check out.