Quote Originally Posted by Humminbird_Greg View Post
Cane Pole,
I’m guessing that the difference lies in the current draw of the Humminbird versus the Lowrance or Garmin units or possibly in the wiring of one versus the other. Ways to possibly fix this would be to run separate power wires from the battery to the Humminbird unit and/or wire the Humminbird to a different battery.


REDEYE50,
Is your 987 locking up when any other ‘event’ on your boat is taking place like; starting the main motor, keying the mic on a radio, the aerator kicks on, etc.?
Can you test your 987 on another boat that is running a 900 or 1100 series Humminbird unit (does not have to be an Si unit but any of the newer Si units will work for this test)?
My power/ground are home runs. Sure hate to add a battery. Costs money and I loose .2223 MPH off top end.