2005 merc 60hp 2 stroke tach installation?

Zach98

Recruit
Joined
Aug 17, 2017
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Hey guys im trying to install a tach on my motor and im not sure which wires go where,
There is a blue with white stripe, red solid, green with white stripe, and brown.
The tach only needs 3 wires it looks like, ground, ignition, and sending.
Also how many poles does the alternator have? Thanks in advance
 
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