1984 yamaha 90 tach questions

levi_tsk

Ensign
Joined
Dec 26, 2010
Messages
907
ok so ive got a buddy that has this motor and despite going to MMI he cant figure out the wiring on the tach so firstly i need a wiring diagram

also the tach hes trying to hook up has the oil lights and wiring - i looked up the tach on boats dot net and that year model doesnt have these so im confused, can it be retro fitted?? and any help in this matter would be much apreciated

he "SAYS" it wont run right without the systems check (or whatever yamaha calls it) could this be true?

on the tach he has the lights come on but supposedly the needle doesnt work... i looked at it yesterday and the green and the black wire coming out of the control box werent hooked up to the tach at all... does this sound like the problem? the green plugs right in but the black has a male connector on both ends....

ive worked on all kinds of johnnyrudes and done some stuff on a M60B tohatsu but as of yet not familar wil the Yam's
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
9,128
Re: 1984 yamaha 90 tach questions

It would help if you posted the model #s of tach and motor

On Yamaha Green is tach signal, black is ground, and blue is light
 
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