Depth Finder/FF - Hull or Transom Mount?

[Smellycat]

My bass boat came with a simple depth finder built into the dash.  The transducer was hull mounted.   Almost immediately I began to experience loss of signal (LOS) at some point after getting my boat on plain.  Sometimes the signal would come back and other times the signal wouldn't return until the boat was again back in the hole.  The dealer sent me a new transducer which I chose this time to mount on the transom because I was afraid of running into the same problem again.

Well, here we are a couple of years down the road and I've been experiencing the same problems all along and just living with it.  When I lowered the transducer as far as my current mounting will allow I have noticed the frequency of LOS has decreased but I am still experiencing it to often.  

The transducer is mounted to the starboard side on the lowest or deepest point of the tramsom.  However, when the boat moves this entire area is in mild turbulent water or severely turbulent water.  My flasher is mounted on the port side along the same plain.  

1) What might have been wrong with the original hulled mounted transducer and could it have been fixed?

2) I am thinking of repalcing this dash mounted  depth finder with a digital depth finder and replacing my bow mounted flasher with an easier to read LPG unit.  Where should I mount the transducers for these units and how?

Looking forward to your feedback    :-/  

[cedar1]

Qoute

1) What might have been wrong with the original hulled mounted transducer and could it have been fixed?

2) I am thinking of repalcing this dash mounted depth finder with a digital depth finder and replacing my bow mounted flasher with an easier to read LPG unit. Where should I mount the transducers for these units and how?

Smellycat, I dont know much but here goes. Mounted in the hull it was either coming out of the woter on plane or there was cavitation under the hull. Try a different location in the hull. Same with the transom mount. It is seeing cavitation. Up or down may not do anything because it may be mounted where there is a chine or a step in the hull directly in front of it, I had this problem and moving it away from a step in the hull cured it.

[minnesota_bass]

you may be too close to the motor that will really screw it up the directions on a new depth finder will tell you how far away you have to be

[Bass_junky]

Sounds like you are picking up cavitation.  See if the transducer is mounted directly in front of a rib on the bottom of the boat.  If you have mounted the transducer per instructions check the following.

Adjust the angle of the transducer to fine tune it.  Every transducer has a specific angle for specific boat model, which will perform best.