help tachometer driving me crazy

wbf30934

Cadet
Joined
Jun 1, 2012
Messages
22
hey yall
I have a 90 hp evinrude and I cant seem to get the tachometer to work right

I have it wired

gray to send
purple to ignition
black to ground

and a purple to the light

there is another black wire that im not sure as to where it goes if you hook it to the ground it blows the fuse running into the solenoid

does the engine have to be running for the tach to read? and any ideas on the other black wire?

Its really driving me crazy im having an issue with a false over heating alarm so I getting the tach in place so I can see what the RPM's are when it goes off.

Please HELP!!!!!
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: help tachometer driving me crazy

Better check the black wire to make sure somebody hasn't spliced it into a hot wire some place.
 
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