Say no to drilling holes in your boat, http://www.transducershieldandsaver.com/ plus if you need to raise or lower the transducer to get better reading you can block the L bracket, mine set 1/8" below the step and works great. If your not going with a saver be sure to mount it to a transducer mounting plate http://www.cabelas.com/product/Cabel...g&gclsrc=aw.ds