Lowrance hook 7

[Jmitch1102]

I recently purchased and installed a hook 7 on the transom of my aluminum deep V. The image seems to have a lot of noise on the screen but clears up a little if I’m move really slow < 1mph. I will try to upload a photo of the transducer mount. Any help would be appreciated. I posted in the freshwater fishing forum a while ago with no response. Thanks

 

[dingbat]

Transducer looks too close to the prop and too far below the bottom of the boat.

Is the bottom of the boat welded or riveted? Any

 

[Jmitch1102]

The bottom is riveted. If I remember correctly it is 1/4” below the bottom of the boat. I will get a better picture.

 

[Jmitch1102]

The kicker motor that’s right above it was not on the boat while I was testing the unit.

 

[roscoe]

Is the issue when using the main motor, the kicker, or both?

Definitely to close to both motors.
Move the duper to the port side.


Is this a side image unit? If so, you are gonna have to have a lot more clearance to get it to work at all.

 

[Jmitch1102]

It’s just down image. The problem is with the main motor. I just set the kicker on today to try it out on a limited hp lake. Now to top it off I noticed when I set the kicker on it pinched the transducer wire. It’s not cut through the jacket but was pinched in 3 spots. I originally did not mount it on the port side due to a swim ladder Being there. If I decide to leave the kicker on I guess I better move it over under the swim ladder.

 

[Jmitch1102]

How far from the prop should the trans be?

 

[dingbat]

How far from the prop should the trans be?

Ideally, the transducer should be mounted on the starboard side, at least 3” outside the diameter of the prop.

A rivited bottom creates a lot of turbulence as it passes thru the water. The rivits are going to make it hard to get a good reading at any speed. Lower is probably better in this case

 

[Jmitch1102]

Would moving it to the port side effect it greatly? I’m thinking about putting a kicker motor on the starboard side. I believe it is mounted 10” from the center of the prop right now.

 

[Jmitch1102]

How far from the prop should the trans be?

How far towards the port side should I mount it?

 

[wn6ngp]

which transducer is it that you bought/mounted? ?Are you able to change the frequency of the soundings? Perhaps a lower frequency setting would be less susceptible to the bubbles.

 

[Jmitch1102]

• 455/800 kHz DownScan Imaging, Med, High (CHIRP), 83kHz/200kHz.

I believe this is the trans that came with it.

 

[wn6ngp]

I'm shopping for one similar to this myself but I don't know the capabilities so bear with me....but.....can you change a setting so that it only sounds at 83khz, not the higher frequencies? I would think that the lower frequencies would be less sensitive to the bubbles caused by all those rivets. I have an old school LMS320 transom mount on my fiberglass CC mounted next to the tunnel hull and it works very well at all speeds. Occasionally, when I back up and create a lot of bubbles/foam in that area it loses its mind and can't give an accurate reading, but that seldom happens.

 

[dingbat]

can you change a setting so that it only sounds at 83khz, not the higher frequencies? I would think that the lower frequencies would be less sensitive to the bubbles caused by all those rivets.

The air in the turbulence is interfering with the transmission of the sound waves to and from the transducer.

Changing the frequency will have no effect on performance in this situation. The only solution is to remove/reduce the amount of air in the area of the transducer

 

[roscoe]

Move the transducer to port side, move it out 9-15 inches away from centerline, locate it between the external strakes on that Starcraft, mount at appropriate depth, may take trial and error to get it right. It should work fine.