Sonar interference 1871f and tm185m

[omer48]

hello, I have been trying to solve this problem for 1 month. I think the problem is related to the vibration of the engine. can you give me an idea? engine turbulence ? engine vibration ? this is what happens after passing the 5 km speed

 

[gtstang462002]

I can’t fully tell from the picture of the stern, but it looks like the transducer is not sitting low enough in the water and would be creating cavitation once underway.

 

[omer48]

I can’t fully tell from the picture of the stern, but it looks like the transducer is not sitting low enough in the water and would be creating cavitation once underway.

thanks for your answer. I took some more photos. what do you think I should do ?

 

[gtstang462002]

I am sure that @Deep Blue can better answer this, but to me it l would think that the transducer needs to drop down more to get into clean water while moving. I am far from an expert when it comes to transom mounted transducers.

 

[Deep Blue]

This is the typical guideline that I like to use when installing any transom transducer.

- Deep Blue