tach question

Lodgepole

Petty Officer 1st Class
Joined
Aug 24, 2003
Messages
272
I have a 78 Evinrude 70 hp 3 cyl and am trying to fit with a tach. I am told it has a 12 pole alternator. Can anyone tell me how many pulses / revolution on the gray tach wire.
 

gyoung

Seaman Apprentice
Joined
Mar 27, 2005
Messages
38
Re: tach question

A 12-pole stator will produce 6 pulses per revolution. If you are installing a new tach the instructions will tell you how to set the dial on the back. For example the Faria tach I have has to be set on position 5 for a 6-pulse system. Confusing!

Good luck.
 
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