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Trying to figure this out. Like title says. After 10 MPH its jumps from 1.6 to 44ft to 150 ish ft and so on back and forth. Its on a 17.5 ft flat bottom aluminium big john boat . Heard air bubbles may be getting under ducer. Whats the best fix.
Newell
IS the tranducer on the transon or inside the hull had same problem on my skeeter when it was on transon move to inside the hull work great now had it to about 56mph and signal was never lost water depth stay right there.
At the rear on the bottom passenger side if hooked up to a truck. Its the bigger hd transducer.
Newell
Aluminum hulls are notorious for creating air bubbles (especially riveted boats)...
Inside the hull with the HDSI xducer on an aluminum boat is not an option...I have heard of no one successfully getting SI readings thru an aluminum hull...
Try tilting the back of the xducer down 2-3 degrees...
If that doesnt work.. Try lowering the xducer to get it more into "clean" water...( realize lowering the xducer makes it more succeptable to being hit by underwater objects)
Rickie
I have the same problem,only mine quits at 18mph. the only way to fix it is mount below the bottom of the boat. I was on the BBC site and they have the problem too. The bass guys have been running another 2D transducer with a switch for running on plane.
It's all about transducer placement. I can record 2D, SI, and DI data from the HDSI transducer on my Ranger 1860 up to the mid 40s. I mount mine a touch lower than the traditional placement, and as mentioned above, tilt the back end of the transducer down a notch or two for optimum results.
same thing here.mounted on triton.i also reach speeds in the 40sQuote:
Originally Posted by Jason Halfen #511
Thanks for the help. I will lower it.
Newell
got any pictures of the lower transducer placement? trying to see how much lower. I currently have mine running through a splitter with a 2d shoot-thru for on-plane speeds.
Heres some picts.
Newell
You may have great difficulty getting "clean water" from the bubbles created on a riveted boat....
Rickie
I don't really expect to be scanning anything above 10mph. I just expect a depth reading so that was why I went with dual transducers. I think there is a shoot-thru for aluminum boats out there somewhere (not by humminbird) that you can use if you want 2d/depth above 10mph
If you find one let me know. I know Vexlair makes a alumaducer but i think its just for their flashers
http://vexilar.com/pages/accessories/accy_transducers_au.php
plenty of options. it includes humminbirds also.
So I would have to go in my 998 and switch transducers everytime I want to get on plane?
I had a Lowrance eliete 5 just 2d and it read depth fine all the way to to top speed at 30 mph.
Newell
on which way to move this one. I lose it at 18mph.
http://i871.photobucket.com/albums/a...6/100_1250.jpg
http://i871.photobucket.com/albums/a...6/100_1251.jpg
nope, you can use the transducer splitter cable. It will always get the 2d from the shoot-thru and SI/DI will still come from the other HDSI transducer. I get readings to 30mph(my topspeed) on 2d.
Quote:
Originally Posted by newly
You will have to move the ducer down a little as the back end of boat rides higher in/on water the faster you goQuote:
Originally Posted by wilbur
Thanks Jaxsprat How far do you think 1/2in. 1in. 11/2? From that pic I moved it to the right 3in. It helped a little not much
Wilbur.. Are you able to let someone else run the boat while you peek over the transom to see how the HDSI xducer is running in the water...??Quote:
Originally Posted by wilbur
Maybe visual evidence can help make some determination...
BE CAREFUL.... DON'T FALL OUT OF THE BOAT!!!
Rickie
pretty much of a good guess, see if u can eyeball what 1/2 or 3/4 inch would do by looking at it, if that would put it below bottom. On my riveted tin boat I had to get just over a 1/2" below to get reading to 32/34 (top speed) but of course this puts ducer at risk of hitting stump as u are now below boat bottom. Other choices get splitter cable &HB hi speed 2d ducer for hi speed use its about 1/2 price of Si ducer & keep expensive SI ducer high & protected. Or for about $39.00 u can do what I did--bought one of these Transducer Brackets for Outboard Motors | Bass Pro Shops Yes it let me move ducer all around without putting one screw hole in boat thought it was great but in the end it told me what I did not want to know --had to go below bottom of tin boat but yes I still use this bracket because it enabled me to be able to mount ducer that 3/4" lower.Quote:
Originally Posted by wilbur
I got another question. On the other side of the boat exactly in the same spot is the stock 2D transducer that came on boat to run a cheepie graph. It is even a little higher and it works. Why does a 2d work and not the SI transducer?