Installing a Tach on 50hp 3cyl

[reelhappy]

Hello Everyone,
I want to install a tach on my 2001 50hp 3cyl 2 stroke merc and when looking up tachs they refer to the number of poles instead of cyl's. Can someone tell me how many pole tach I need and what exactly this means. I also assume I need to buy the harness that plugs into my controls which currently it has nothing in it. Thanks

 

[Barnacle_Bill]

Re: Installing a Tach on 50hp 3cyl

You have 12 poles and 6 pulses. Most tachs for that motor would be set to 6P.

 

[achris]

Re: Installing a Tach on 50hp 3cyl

Usually there are 4 positions on the back of the tacho. 4cyl, 6cyl, 8cyl and 12P. Set yours to 12P.

Chris........

 

[Don S]

Re: Installing a Tach on 50hp 3cyl

The setting number (For Merc tachs) is the number of POSITIVE poles on the stator.

 

[reelhappy]

Re: Installing a Tach on 50hp 3cyl

Thanks and you are correct my manual is on the way.

 

[hkeiner]

Re: Installing a Tach on 50hp 3cyl

The below links to Teleflex website may help you too. The information provided would apply regardless of the brand tachometer you actually use.


http://ww2.tflx.com/obtachtrad.html

http://ww2.tflx.com/tech.html

 

[edjunior]

Re: Installing a Tach on 50hp 3cyl

Yup, 6P. I just recently installed one on my 75hp. Works great.