need help with tach 50 honda

[honda00762]

installed new honda 50 on boat with new controler and wiring
and bought a new honda tach, installed it engine runs great
but tach is not reading right sometimes at idle 2000 and when at full speed
is barried.
i hooked the grey wire to the grey and the black to the black the black with yellow strip to black with yellow strip
i checked the with a vote meeter black and black with yellow and have 12 volts,

i went back to the dealer and they gave me a new tach same thing

how does the tach know if it a 3,or four cly there are no setting on the back?
any help would be great

 

[JUSTINTIME]

Re: need help with tach 50 honda

u should have settings in the back

 

[old-gubbins]

Re: need help with tach 50 honda

I have just done the same with a BF45. I bought a tach (second hand) off a Honda dealer, and asked about pole settings. He said all Hondas use the same pole settings, so the tach is not adjustable. Mine was previously on a 90hp.

I cannot help really, as mine seems to work ok (only run in a tank so far), idle at 900-1000. Wiring as you stated, grey/grey, black/black, and black-yellow/black-yellow. I made a mistake, tach b-y to control harness yellow-blue
, but corrected it before running!

Welcome aboard! I reckon you must be my side of the pond? grey/gray!

Hope this is of some help,

o-g