Garmin has a splash guard...stainless steel and bolts between the ducer & the bracket. Comes with longer screws. I think it was around 20 bucks. My boss ordered one and didn't use it. Yay me! Works great.

Mine was splashing right on the motor. I was able to treak it a little and raised it up. It still has a bit of rooster tail,but it doesn't reach the motor now.

Ducer splashguard
 

Thx boo and Ron
This site is terrific. Asked a question and within 24 hours learned about a transducer splashguard and had it on order.

I have a thru-hull on the SeaCraft but I made this for the Whaler. Aluminum/composite/aluminum 3/16" thick. It knocks down about 95% of the spray.

Thanks guys
 

I have been remiss in thanking Boo, DonV and perhaps others for solutions to my Garmin transducer rooster tail. Took the easy route and ordered the sheet metal splashguard that resides between the ducer and bracket- it solved the problem. At this point the Garmin is like having an HP calculator being used for only four math functions. But even the wife likes it and tries to seek out shallower areas to anchor. Also helped get us back to the ramp after getting into a portion of the lake with too many islands that looked alike. Thanks again guys!