bassackwards91 Posted July 25, 2016 Posted July 25, 2016 I recently bought a Humminbird 999 HD SI unit and i made a mount for my transducer to mount to my jack plate. I am having trouble getting the side imaging and the down imaging clear. I have attached a few pictures of the setup and i know it is kind of hard to see cause it is dark but what are yalls thoughts... I have not been having any look with any of my units besides my 858 with the ducer mounted to the trolling motor. I have had all sorts of trouble with my depth not auto adjusting, not getting a proper depth reading and so on....I have went through the settings and changed all kinds of stuff hoping to figure it out and i started getting the right depth reading but it still wont auto adjust on SI nor DI...I had the same problem with my 898 which is now mounted on the bow... Do yall think the transducer is maybe mounted to close to the transom and the extended pods are obstructing the sound waves? Quote
Super User flyfisher Posted July 25, 2016 Super User Posted July 25, 2016 i am sure others will chime in but isn't the transducer supposed to be mounted perpendicular to the stern? Maybe it is and i can't tell by the pictures. Quote
bassackwards91 Posted July 25, 2016 Author Posted July 25, 2016 2 minutes ago, flyfisher said: i am sure others will chime in but isn't the transducer supposed to be mounted perpendicular to the stern? Maybe it is and i can't tell by the pictures. It is perpendicular to the stern, it is running front to back directly under my jack plate Quote
Super User Wayne P. Posted July 25, 2016 Super User Posted July 25, 2016 For the sharpest images the face of the transducer should be parallel with the bottom of the body of water so the SI pulses are vertical. Most boats set bow up when at rest or at idle speed when scanning. That means the transducer as attached to the transom should be higher at the temp sensor end than the front of the transducer when the hull is level on the trailer. Additionally since you have it attached to the jackplate, if you do not have a holeshot plate or some cover on the bottom of the jackplate, the unit will record sonar echoes from the inside of the opposite side the transducer is mounted and have a series of lines on the right side of the SI view and at the top of the DI view. IF you would have purchased the Transducer Shield and Saver L bracket that is designed to attach to the side of the jackplate, the transducer would be positioned at the proper attitude. It looks like you copied that L bracket and installed it backwards. The angle goes against the transom. Additionally you should be using a shoot-thru XP 9 20 transducer in the bilge for 2D sonar and both transducers connected to the display with the AS SIDB Y cable. That is the proper installation for that hull. Having depth reading issues is typically due to cross-talk between units operating on the same frequency. Try turning the unit off that you are now viewing or at least turn Sonar Off. Quote
bassackwards91 Posted July 25, 2016 Author Posted July 25, 2016 3 minutes ago, Wayne P. said: Additionally since you have it attached to the jackplate, if you do not have a holeshot plate or some cover on the bottom of the jackplate, the unit will record sonar echoes from the inside of the opposite side the transducer is mounted and have a series of lines on the right side of the SI view and at the top of the DI view. So would i be better off mounting it to the transom with the factory transom mount, and if so what is the best areas to place it? Quote
Super User Wayne P. Posted July 25, 2016 Super User Posted July 25, 2016 Most with that have jackplates, do what you did, but do it correctly. I'll send you a PM with some reference info. Quote
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