Sorry if this is the wrong place for this, it is kind of an install question.
So I installed a 998 unit on my boat a few weeks back, and have been trying to get it all tweaked correctly. The install wasn't too terrible all things considered, but I am having trouble with one thing. (So if anybody ever has a question on installing one of these on a Glastron or bowrider type inboard/outboard just holler at me.)
My right side imaging is always darker than my left side imaging, by a significant amount. In order to get a good read on the right side, I have to turn sensitivity up and contrast down so much the left side is completely whited out. Below is an example - note the big ball of shad by crosshairs is directly under my boat. On the left side, it is all white (return) while on the right you can barely even see the baitfish ball. This is a flat bottom.
So here I went by this structure in both directions, you can see both times the right side signal is extremely low compared to left side.
This isn't even close to the worst it gets because this is a very hard bottom. On soft bottom the right side is black while the left is full white (I forgot to take a snapshot on a soft bottom). It makes it pretty much impossible to tune in and actually see fish.
On to pics of transom: first pics from the side.
This is on a Glastron I/O, so I had to get the transducer down below the bottom of the lower unit mount. It is somewhat close to the motor, I know, but there is clear line of site underneath the lower unit for the full 'ducer. More importantly, the port side image is the good image, it is the starboard image that sucks, and there is nothing else over there on that side to block/interfere with the signal.
Okay, so from the back. When I first had this problem I thought, hey, my 'ducer probably isn't level. If the right side of the ducer is pointed up, that could explain why that side signal is weaker. So every time I have been out, I have turned the ducer slightly clockwise to get the right side down. Below is how it is currently:
As you can see, the right side is actually down now past level. I took a level out on the water with me today: my swim platform is level on calm water with me on the starboard side like I am driving, and the bottom of my lower unit is level with my swim platform. So in the water, the bottom of my lower unit is level - the ducer is now over-rotated clockwise but the signal isn't any better.
As well, in some pretty big swells (boat listing at least 10-15 degrees to each side) the right signal is
never stronger than the left. I tried to get a pic of this, but had restored defaults and forgotten that it turns off taking images when you "Mark" your screen.
Anyone have any experience/ideas what could be the issue here? Sorry for the long post, just wanted to give as much info to anyone that might be able to help as possible.