another stupid transducer question/Wayne

[Bandone]

I bought a new helix 12 chirp mega SI gps……#410380-1.....transducer included is XM 9 20 MSI-T....My stupid question is which in hull for high speed readings can I use. Humminbird has made it pretty confusing the last few years , when I installed my 1197 there was 1 transom mount transducer and 1 shoot thru hull, even a stupid retired truck driver like me could figure it out, without having a electrical engineering degree. thank you

[Wayne P.]

The 9 and 20 are the common denominators for compatible transducers. 9 for connector type, and 20 for 20 degree spec coverage of 200 kHz.
XP is the shoot-thru model.

XP 9 20 is the shoot thru for both models you have.
But you have to change the Y cable since MEGA SI transducers have a DI piezo and the 1197 does not. 9 M SIDB Y

[Bandone]

thanks Wayne, that's sorta what I thought but wasn't sure, and I wanted to be clear. I'm replacing the 1197 with the new helix 12, its been a awesome unit its just time for a freshen up. thanks again

[Wayne P.]

You may want to change the shoot-thru to a newer one. They wear out over time and don't perform as well as new.
The Helix will be CHIRPing it also unless you turn CHIRP off.

[Bandone]

You may want to change the shoot-thru to a newer one. They wear out over time and don't perform as well as new.
The Helix will be CHIRPing it also unless you turn CHIRP off.

yep doing that right this very moment, thanks again