fishfinder transducer issues

[youngy555]

the old lowrance x51 unreliable performance finally gave me the shits enough to go out a buy a new one (humminbird 141c) which i installed a few days ago. Got a chance to get out on the water and suss it out this morning and noticed when above 15-20knots the depths would vary quite a bit and irraticly (and before you say it, i know that the bottom where i was is flat), it also would vary 1-3m when drifting. Now, when i "carefully" removed the old one i didint take much notice to exactly how it was positioned, what sort of angle and position in relation to the bottom of the boat ( 4.6m quintrex escape), pamphlet is a bit vauge so thought someone might be able to help, the transducer is hanging roughly an inch below hull, pretty streamline, few photos cheers fellas,

[peterbo3]

Could be a little low. Suggest you come up 10mm & see how it goes.

[finga]

I'd have it so where I've drawn the line it would be level with the lowest part of the hull directly in front of the transducer

[youngy555]

thanks, i'll play around with the position tomo and hopefully it'll come in.