Yamaha 40cv 2 stroke 3 cyl 2006: rpm and alternator output frequency

[sandro]

Hi,
I need to calibrate a tachometer which has a potentiometer to adjust the rpm scale, so I thought to use a frequency meter connected in parallel to it...
but which is the correspondence between RPM and Hz?
Thanks a lot.

 

[Silvertip]

Re: Yamaha 40cv 2 stroke 3 cyl 2006: rpm and alternator output frequency

6Hz/Rev

 

[sandro]

Re: Yamaha 40cv 2 stroke 3 cyl 2006: rpm and alternator output frequency

Do you mean: 1 crankshaft revolution in 1 second = 60 rev in 1 minute = 60 RPM = (60x6) 360 Hz

so...
at minimum 700 RPM = 4200 Hz
2000 RPM = 12000 Hz
5500 RPM = 33000 Hz

???