Transducer options on DSM300 changed

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum naz14,

Airmar, Inc. produces several versions of the B744V and the associated speed/temp insert based upon:
- whether the transducer will be interfaced to an instrument or
- whether the transducer will be interfaced to the fishfinder ... in the case of fishfinders, the B744V's design will also vary based upon the make/model of fishfinder

Please note that it appears that you purchased the incorrect speed temp insert for your B744V. Unlike the instrument version of the B744V, the correct replacement speed temp inserts for B744V fishfinder transducers feature a Y-Cable permitting the plug of the B744V's cable to be unplugged from the sounder module and then be connected to the corresponding leg of the aforementioned Y-Cable. The remaining leg of the Y-Cable would then be plugged into the sounder module's Transducer socket.

Raymarine does not support splicing of fishfinder transducers, as fishfinding performance is often adversely affected and incorrect splicing may result in damage to the sounder module. Please click here to view a FAQ addressing this subject. It is recommended that Airmar be contacted to verify the splicing performed and if necessary make any corrections. If after doing so, the problem persists, then a DSM Reset should be commanded. Should the problem persist there after, then it would be recommended that the sounder module either be tested with another compatible transducer or be sent to Raymarine’s Product Repair Center to be bench checked / serviced.