[stackarp]

Hi!
I had a 703 throttle box and the buzzer sounded "check everything" when I swtich the ignition.

I have change boat and had to mount a new throttle box model 704 then the buzzer doesn´t sound as it used to do.

I have also mounted a sort of adapter recommended from Yamaha supplier.

Any idea whats wrong

/Pelle

[High Compression]

What key switch did you use with the 704? The buzzer is part of the key switch assy.

HC

[rodbolt]

you may have other issues, on a singe engine application neither the 703 nor the 704 will sound a self test, if you hear the horn on a single engine application something is broke.