Tachometer for Force85

"To advance my hunt for the co

"To advance my hunt for the correct propeller i think i need to get a tachometer and see what my current prop does as far as speed and RPM go.

So my question is this,

are all marine tachometers the same?
if not, what am i looking for in a tachometer to make sure it will give a proper reading with the force-85.

i believe my force is the 1987-1989 model from what i can tell from looking at wiring diagrams in the book, which is strange because the boat is an 83. I can't find a 1983 85hp diagram. The 1984-1986 wiring diagram looks nothing like mine, it doesn't have a neutral switch, choke solenoid, or temp sensor but i guess i could be wrong - the diagram may just be incomplete.

anyway,
Thanks
-Mark"

"Not all the same, force needs

"Not all the same, force needs a 20 pole tach, you can also get a "tiny tach" http://www.tinytach.com/tinytach/index.php

they work by wrapping a sensor wire around your #1 spark plug wire. Sometimes eratic, but they work. Otherwise here is a good place for a regular one that will work for you.


https://www.shop.sporqster.com/displayProductDocument.hg?productId=607"