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Old 07-25-2013, 07:42 PM   #1 (permalink)
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Default Humminbird 898c hd si

I just bought a bird 898 thanks pro am! i am going to be mounting the ducer this weekend just wondering if anyone has any advice for the install height of the ducer? How deep? Where abouts on the transom middle left or right? Any advice appreciated. And yes I am putting one of those plastic transducer mounts on the back of the boat.
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Old 07-25-2013, 09:23 PM   #2 (permalink)
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Default Re: Humminbird 898c hd si

Check out the side imaging forums... Lots of install pictures to look at...

forums.sideimagingsoft.com/

I run mine slightly lower than advised just for better high speed readings in 2D... About 1/2" below the transom... Mine is on the right side (generally the side towards the rotation of prop Rh prop right side, LH prop Left side) approx. 18" from the lower unit... Having the board like you said your going to install allows you to tweak the location without adding lots of holes in the transom...
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Old 07-25-2013, 10:28 PM   #3 (permalink)
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Default Re: Humminbird 898c hd si

i just followed the instructions in the box when i mounted my 1198 and there was definitely some luck involved, but it worked like a charm and i nailed it first time. the mounting plate is great (i made one out an old cutting board lol). i think i am due for a re a just, but that is to be expected after a couple months and i only ever have an issue when turning sharp or stopping quickly and i think thats due to turbulence and its rare.
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Old 07-26-2013, 12:35 AM   #4 (permalink)
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Default Re: Humminbird 898c hd si

Does a mounting board help? Absolutely, unless you enjoy making holes in a perfectly good boat, and you will be moving it around a bit to find the sweet spot. Mounted my ducer 17" to the right of the engine for reduced prop turbulence, no lifting strakes and mounted it lower than they recommended, I do loose bottom at times but that's at WOT, on a new lake I'm never over 20 mph and has no problem holding bottom. Once you have your sweet spot put a few wraps of electrical tape around the ducer mount, it will prevent the rooster tail of water shooting up at cruise.
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Old 07-26-2013, 12:45 AM   #5 (permalink)
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Default Re: Humminbird 898c hd si

Quote:
Originally Posted by theKraken
i just followed the instructions in the box when i mounted my 1198 and there was definitely some luck involved, but it worked like a charm and i nailed it first time. the mounting plate is great (i made one out an old cutting board lol). i think i am due for a re a just, but that is to be expected after a couple months and i only ever have an issue when turning sharp or stopping quickly and i think thats due to turbulence and its rare.
Can you post a photo of your install? Kinda curious how you work a cutting board in there.
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Old 07-26-2013, 10:30 AM   #6 (permalink)
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Default Re: Humminbird 898c hd si

Can you post a photo of your install? Kinda curious how you work a cutting board in there. [/quote]


no videos, lol sorry

i totally forgot to pick up a mounting board and i am living out in pointe du bois right now and there was no way i was waiting to install my knew toy. i had an older cutting board so i just cut it in half and siliconed and screwed it together to get the thickness i needed and then mounted it. its working great so far
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Old 07-26-2013, 09:57 PM   #7 (permalink)
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Default Re: Humminbird 898c hd si

One thing I find very useful is to have a "card" or small flat ruler to extend beyond the hull to butt up against the front of the transducer. This will show you exactly where the water will contact the transducer. For a larger transducer like on the SI unit you have, you'll only want about 1/3 of the transducer to extend below the hull. The remaining 2/3 will be in-line and slightly above the hull. It may take some minor tweaking, but this is generally how I set it up... 80% of the time it's bang on the first time.
The other thing to do is to "slightly" angle the tail part of the transducer a couple degrees downward. This ensures the water is hitting the bottom of the transducer without any air pockets.
The biggest misconception is to set the transducer too low. Let the height of the rooster tail be an indication of the appropriate height of the transducer. If you're getting a high rooster tail, this is a clear indication the transducer is too low. A height at or just above the transom is acceptable... anything higher and the transducer is too low.
I've rigged boats with a single external SI transducer exceeding 50 mph and still getting a good high speed reading. Any time you run into a situation where you lose the signal or get intermittent performance, it's a rigging issue. In some cases you might lose the bottom reading (bottom projected on your screen history), but you should still have your depth number.
Another rigging option, more so for boats exceeding 50 mph is to go the route of incorporating a AS SIDB Y cable. This involves installing an XNT 9 20 T dual beam transducer and connecting it into the one end of the Y cable and connecting the SI transducer into the other end of the Y cable. Essentially the DB transducer is giving you your high speed dual beam reading... your SI transducer can effectively be mounted above the hull since you'd be using it for SI and DI while traveling at lower speeds where you'd be back in the hole and using the SI and DI elements. The DB transducer would be effective for high speed reading... basically both transducers would be interpreted simultaneously. When you lose the db signal in the SI transducer, the DB transducer picks it up.
This is also a common way to rig a glass boat where the dual beam transducer would be mounted in-hull.
Feel free to PM me if anyone has any questions about this type of rigging.
With a mounting board - which I always recommend, you may have to use shorter transducer mounting screws. ...Sounds like you got it all figured out. Now the next part is just to spend time learning your sonar... can't mess anything up. Worst comes to worst, you can always set it back to factory default. Enjoy!
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Old 07-26-2013, 11:14 PM   #8 (permalink)
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Default Re: Humminbird 898c hd si

Heres a few photos of the si transducer my old locator was Humminbird wide beam with the dual transducers and the bracket is the exact same as the one that came with the 898. It would be nice if it works would save me alot of trouble just hope the motor is not an issue








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Old 07-27-2013, 09:19 PM   #9 (permalink)
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Default Re: Humminbird 898c hd si

Looks OK... Keep an eye on the tail angle of the transducer though - it looks kinda low. As long as everything is working when you water test it, you're good to go.

Cheers, Darrin
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Old 07-27-2013, 09:38 PM   #10 (permalink)
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Default Re: Humminbird 898c hd si

Ya it kinda dips down cuz of the angle of the transom but in the instructions it shows that's proper cavitation like that so I'm hoping it works ill let yah know when I finish hooking it up
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