Tach Question 1978 35hp Jonny

riverjet502

Petty Officer 2nd Class
Joined
Dec 28, 2006
Messages
116
I would like to wire a tach onto my 1978 35hp Jonny. It has electric start but doesn't have charging capability. Is it possible to adapt a tach onto this or is my only option a mini tach with a wire wrapped around the number one plug wire? Thanks..
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: Tach Question 1978 35hp Jonny

Something is wrong here. A 1978 should have battery charging. Are you sure it is a 1978? Or, did somebody add a starter to a rope start motor? Whatever, if no charging alternator, your option is an inductive (plug wire) tach.
 

riverjet502

Petty Officer 2nd Class
Joined
Dec 28, 2006
Messages
116
Re: Tach Question 1978 35hp Jonny

Yes it is a 1978 model. I did add electric start as this was a factory rope start when new hence no charging capability. How tuff would it be to add the alternator? Is a mini tach my only option at this point? If so which model am I needing to get? How accurate are they? Thanks
 
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