Transducer Placement for HB997C SI

[Stickman]

Hello everyone. Been reading posts on this site for a while, just signed up and started posting. Just purchased a used 997c SI. The unit came with two SI transducers and a third 2d transducer. Putting unit on 17ft Xpress. Would like to hear suggestions on transducer placement. I don't think I will need both SI ducers, but yall tell me. In the following pictures, my motor is trimmed all the way down, so it seems there is plenty of room between boat and motor to get clear sight to both sides. Also, where on 2d ducer? The other SI ducer will either be back up or might look at putting up front, running second GPS and power cord so I can move unit to front.

Also, is the SI transducer suppose to be level with bottom of boat, slightly under, or above bottom line?

Appreciate any help. First SI unit and want to limit the new holes in boat!

[luvin.fishin]

Just look at some of these locations.


sideimaging : UnOfficial Humminbird Side Imaging Group

[Jethro]

Did you get an owner's manual with the unit? If not, you can download one from HB website. Manual discusses best placement of transducers, and has a mounting template for positioning on transom and deadrise.

[Fisherman_Wantabe]

Here's mine I have to trim up alittle but so far so good.

[Stickman]

Thanks for the info. I guess there isn't any reason to mount the second SI transducer on the back for my setup. How about the 2d transducer for high speed? Do most of you get bottom readings when running 35 to 40 with your SI transducers? My plan is to mount one SI transducer right beside existing transducer. That would leave plenty of room for the 2d transducer to the right and above the SI transducer so not to block the SI. Is that neccessary?

Also, any ideas on mounting second SI up front (TM mount or other) and moving the 997 from console to front while spider rigging. May require to much to constantly move backand forth. Thoughts from anyone welcome...

[Humminbird_Greg]

I would start by removing the existing transducer and mounting one of the HDSi transducers just to the right of that position. Hold off on the second HDSi transducer and the 2D transducer until you figure out if you really need them or not. If you need the 2D transducer for high speed readings than I would mount it on the opposite side of the motor in about the same location so as to lessen the amount of Si sonar that it blocks to that side.

[Big Ridge Brewer]

Stickman what did you end up doing here? I can't decide what route I should take regarding high speed readings. I have the depth finder here and boat halfway taken apart but am in wait mode on the ram mount.

My unit only came with the SI x-ducer. I can't decide if I should order another x-ducer for high speed running and mount the SI so it's out of the water when Im running or just go with it as my sole x-ducer on the back of the boat.

[wilbur]

Where fishermanwantabee has his should be fine for slow or high speed. You gotta be outside the step.

[Stickman]

Big Ridge Brewer, I probably went overboard, but I mounted both SI transducers up higher on the boat for protection. I had two and the splitter cable, so I used them. I then mounted a 2d transducer down lower for high speed running because the SI ducers are above the water by several inches. I had the stuff, so I went the route of overboard so I wouldn't have to redo anything. I will try to get pictures soon and post. Not sure the best way, but I have gotten a lot of good side and down images.

[keeferfish]

so what is high speed (mph) and can anything be used thru hull? doubt it! If anyone has pics on a fiberglass boat please post. Thanks