fish finder ,transducer ?????

[dakotarmx]

okay bought pirahna max 20 fish finder hooked it up and mounted the transducer in the spot were the old one was .today was out on the water .and when i get up to speed plane .i look back and theres a abnormal rooster tail shooting out from the transducer ????what .what did i do wrong ,,any opinions

 

[rickdb1boat]

Re: fish finder ,transducer ?????

The transducer bottom surface should not mounted much below the bottom of the hull. Just slightly, would be best. This is probably the cause of the rooster tail effect...<br /><br />

 

[TheChad]

Re: fish finder ,transducer ?????

Not to steal this thread away, but I have a question that kind of goes with this....<br /><br />Are transducers suppose to work at high speeds? like 30+ MPH?<br /><br />When My motor was mounted 1 hole lower it would work at 40MPH, but when I moved my motor up one hole, after about 25MPH it doesn't work, the fish finder just shows jumbles and werd stuff like 2000 Ft debth..<br /><br />Thanks,<br /><br />-TheChad

 

[jtexas]

Re: fish finder ,transducer ?????

chad, with your new setup, your transducer is now running in turbulence - assuming it's the right height as shown in rick's pic, it's probably too close to the motor.

 

[dakotarmx]

Re: fish finder ,transducer ?????

thanks for the input rick

 

[Boatist]

Re: fish finder ,transducer ?????

I think even rick is a little high. I put a stright edge on the hull on the deep side and try to get the top of the rule to be right in the center of the transducer. In ricks great picture the little notch I would line up with the bottom of the hull on the right side. <br /><br />Yes it may have a roster tail. Yes a little stick or debree may hit it and kick it up but it will work at high speed. Make sure not too close to the chims. 12 to 18 inches from the motor is about right.<br /><br />Like ricks mount it where the transducer can be adjusted up as down, then go test it. If it works at speed as ricks is mounted great. If not lower it some and try again.

 

[dakotarmx]

Re: fish finder ,transducer ?????

thanks for the tips boatist .i did lower mine down a smige kinda aimed the tail down a bit .the orignal unit was a monster big its got three wholes in a triangle shape .im trying to keep from putting any new holes in my boat so i used two of the old holes and pluged one ..hope i got it sqaured away .