transducer problems

[darynxbcoupe]

Hi all,

I have a Simrad nss9 with a HDI 50-200 transducer, I cant seem to get it set correct as it has too much interference and only works properly at around 3 knots. Will it work better if I put it as far away from motor possible?? I have about 100mm I could move it on the plate.

Cheers Daryn

[Marlin01]

A picture would be invaluable here. Just checking the basics, not aligned with a strake, transducer is below the bottom of the boat, how far is the tranny from the motor leg and prop?

[darynxbcoupe]

will get picture tomorrow, what is the strake??

[NaClH2OK9]

A strake is a longitudinal ridge on the hull.

[darynxbcoupe]

thanks for that, it isn't behind a strake, here is a couple photos

Any suggestions?

[NaClH2OK9]

The photo angles aren't great but I'd say drop it an inch and try again. That made a huge difference to mine.

Have a look over the transom whilst driving) or someone else driving) do you have clear water around the transducer? Try and change the angle by just a degree or so.

[darynxbcoupe]

So should it be totally under the hull then?

[NaClH2OK9]

I'm only an amateur so many will give better advice.

All the pics In the manual showed me to have it half way.

And I like you lost signal at very low speed. I dropped mine so the top was level with the bottom of the hull and it made a massive difference.

I don't have as big a deadrise as yours but when I looked over the transom there was white water around it even at low speed.

I also found heel down by just a degree helped me. Run a straight line the length of the hull to the transducer. Start level then adjust.

A little adjustment can make a big difference

[darynxbcoupe]

Thanks for your advise I will lower it and test after work this week, much appreciated.