I'm running garmin's currently.  Have a 93 SV at console linked to a 73dv up front that I use only for mapping then I have a 73sv up front also. Love the units. Mapping and traditional sonar are great. The down imaging is horrible tho. I have my ducer mounted on my jack plate.  Even without engine running the down imaging is blurry and just not good. Is this just the nature of the beast with these units? I'm aware of the transducer woes and all that. Mine has the CV transducer. I dont use the down imaging much but this has me wondering. The 73 seems to be a little better but still not great. Any advice? I've played with the settings with no luck. I'm not that knowledgeable with these things. Any help would be greatly appreciated.  Thanks

I have the same unit. I use mine in a kayak though with a side mounted transducer. The DI is great for me. I can see individual strands of hydrilla coming off of the bottom and it shows branches in trees, besides fish etc. I'm thinking you might be getting some interference from other electrical or electronics on the boat. Is the side imaging lousy also? The only thought I can come up with is to try taking the transducer loose and maybe mount it on a 2x2 or something that you can stick down into the water and test it that way to see if it makes a difference. Good luck!

FM  

The side imaging is great.  Much cleaner and crisper. I'll play around with it some more and may try what you suggested.  I've had it for months and never really tried the down imaging.  Buddy was checking it out last time out and we noticed the down imaging wasnt great at all. Does yours have the CV or gt transducer?