Topic: Left Side Scan Issue...

[joe20toon]

I just got the Helix 7 and the left side does not show up as well as the right.
I have a 20 foot pontoon boat. Would the left pontoon cause decreased sensitivity?
The engine is not blocking the transducer and I wouldn't think the left pontoon would interfere with it.
The transducer is level. The transducer is on the right pontoon. There's a water pump for the livewells on the
left pontoon. The transducer is lower than the water pump pick up housing.

[born 2 fish]

It looks to be turbulent water air bubbles coming from a pontoon or something on the back of the boat if you look at your pics the last one looks good you were @ 3 mph when you took that pic.when your going faster bubbles are blocking the si sonar pulse on the left side. Try to keep your boat speed @3 mph as well as your chart speed.see if that helps

[mako9man2]

Speed is the issue for me.  At 5mph I get a poor SideImage.  At 3.8mph it is perfect.  I know its turbulence from my hull.  My transducer is positioned in the optimal location for my boat.  The only other solution would be to mount the big transducer on a pole and lower it below the level of the hull but I'd forget to raise it and probably drag it off.

[rnvinc]

Because of the beam form shape of the SI pulse ...the left pontoon is most likely blocking some of the pulse ...


Pontoons benefit from a dual SI xducer setup with the AS SILR Y cable ...

http://www.humminbird.com/Products/AS-SILR-Y/

Rickie

[born 2 fish]

You can always put a si transducer on the left pontoon and the right pontoon using a AS-SILR-Y cable than you will not have a problem. This is what I did and it works great.

[joe20toon]

Thanks all for the help. I slowed down to 3mph and it looks good.