Hello to all .I'm installing an xi5 with sonar and gps on my boat ,does anyone know if the hummingbird helix 7 can work with the transducer that's already installed on the xi5 ? thanks

There are six Helix 7 models.

The Helix 7 Sonar or Helix 7 Sonar GPS will work with the built-in transducer. Just need the Humminbird 7 pin adapter cable.

Thanks Wayne, What transducer would I need for the  7 si/gps unit ?

The transducer that comes with a Side Imaging model is a transom Side Imaging transducer. Compact SI ---- XNT 9 SI 180 T.

You can get sharper images with the Helix 5, 7, and 9 Side Imaging models. I would suggest you exchange the one that comes with the unit for the XHS 9 HDSI 180 T. That transducer is 2" longer, has longer SI crystals which produce thinner SI pulses and sharper images. It can also be used on a trolling motor since it has extra internal shielding that the Compact SI transom transducer does not have. The exchange price is about $85 which includes shipping. Additionally add the shipping cost of the one being sent back to Humminbird.

Humminbird Customer Service handles the transducer exchange program. Do not open the transducer mount package.