Logo

1987 225 johnson tach jumps around at idle

gradywhiteman

Contributing Member
installed a new tach about a week ago and finally got it running today. i noticed the tach would jump at idle and then became steady at higher rpm's. anyone have an idea as to why?
 
How much does it jump? Is the new tach set right? My cheap tach will jump 100-150 rpm at an idle just because the way the pulses work.
 
Last edited:
Back
Top