erratic tach 110 omc

[Johnson110]

I have this tach that works sometimes and cuts out, i have checked the battery and have over 13 volts, the volt meter on the dash reads over 12 volts, the battery is charging and is a " good battery, it is 3yrs old but still starts the motor, could this be a bad ground somewhere, i have cleaned and checked all connections, i dod not know bad tach, the tach came with boat it is a tempo brand, as are all the other gages are tempo too, the motor is rebulit 3 yrs ago with a new voltage regulator in it, 1986 110 evinrude and it runs very good, anybody know what is up with this! thanks for any replys

 

[REELSPORT]

Re: erratic tach 110 omc

check with your local dealer and see if he has a loaner tach to check yours with

 

[phatmanmike]

Re: erratic tach 110 omc

sometimes it helps if you place a 1/2 watt, 2k ohm resistor between the ground and + terminals of the tach

 

[Johnson110]

Re: erratic tach 110 omc

why would the tech all of a sudden start acting up? is it safe to use it till i can get another one, like i said the battery seems to be charging checked it with a volt meter, thanks again for replys!

 

[R.Johnson]

Re: erratic tach 110 omc

Hook a volt meter to the Tach leads. That would be the gray lead, and black ground. The meter should show 9 + volts, and hold steady.