Graph won't show depth on plane

I know I've seen this discussed somewhere, but I can't find it with a search. Sorry for dredging it up again. Just put a new graph on my boat - Garmin Echo 200. For the money, I'm quite happy with it so far. But, once I get over about 15mph I lose tracking. I know you are supposed to be able to adjust something, but I couldn't figure it out on the unit, and now looking through the manual I'm still lost. Help?

I adjusted the angle of the transducer one click forward and solved the problem. Reads bottom just fine at 40mph. Thanks to all who offered suggestions.

I would adjust your transducer. Play with location, angle, distance below the hull. I did this and can read the bottom at 35mph. good luck

Thanks for the idea Keeper, but I just installed it last week and am pretty sure that the cable isn't pinched. I'll try adjusting the transducer angle slightly forward and see if that makes any difference. Slipery - I'm betting that you have two locators that are operating on close/similar frequencies - same thing happens when ice fishing, you get several people using a Vexilar in proximity, you get interference between locators - that's why the Vexilars come loaded with the Interference Rejection button, to slightly change frequency until the interference goes away. Not sure what you can do about your situation. You should verify what frequencies they operate on first. I have no idea what is too close - call customer support for one of them and ask.

slipery asks "could the tranducers be to close to each other ?" I would think no, but would suggest that the frequency are the same or too close. Some units today you can change the frequency and if you can change one or the other, it might cure what you have.

I turned the other unit off and then it worked fine . could the tranducers be to close to each other ? Crow

Pimply - Another thought I just had - perhaps you have a bad transducer cable. My first unit was exhibiting symptoms similar to what you described, turned out I had a pinched transducer cable.

Slipery - How close are your units mounted on the boat? Also, see if you can figure out what frequency they both operate on. If the frequencies are too close they will interfere with each other.

Good Morning I am having a problem using 2 locators at once . When both units are on 1 unit bottom depth will wack out , The depth will go to 1000 s of feet ! unite is humming bird / the other goofy one is a lorance . now I just use that one for the gps . Any Ideas .

Okay, if its doesn't have any obstructions to create turbulence and its deep enough, then we have to look at the angle its pointing. The transducer should be pointed either straight down or better yet, just a little bit forward (towards the front of the boat). If its angled too far back the bounce of the signal off the bottom would miss the transducer on the echo as the boat would move too far forward and technically drive too far ahead of the return signal to get a reading. If its not that, I ain't sure what it could be.

good advice here there's a number of videos that help give you tips and visual http://www.youtube.com/watch?v=hYpgvN9NLcI http://www.youtube.com/watch?v=2AZi5dsiSRs

Checked out the underside of the boat - no structures on the bottom in line with the transducer, and the transducer is about an inch below the level of the boat. Sure appreciate the collective problem-solving.

When you are tweaking, make sure when you look at eye level with the bottom of the boat that you don"t see any ribs or other curves in line with the transducer. Also lay a straight edge off the bottom of the boat and your transduer face should be a bit lower than that plane.

I checked over the manual and this is what I found: "The included dual-beam transom mount transducer operates at 200khz/77khz and reads depth and temperature" No mention of "high speed" or low speed. You get what you pay for, I guess. I can try tweaking the mounting height.

First thing to check is if you have a high speed transducer. If you do, like others said, it may be mounted incorrectly. It has to be shooting through clean water, small fraction of an inch can have a huge effect.

I agree with Keeper "I'd suggest your transducer may be mounted incorrectly" I knew a guy that had his ducer so high it would not read when on plane. I asked him why isn't it deeper, he says that it wouldn get hit if its deeper. Of course he couldn't see anything coming to hit his lower unit either - duh. Like was said its either too shallow or installed behind a rib or some other thing on the boat that causes turbulence.