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  Transom mount transducer location for Montauk

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Author Topic:   Transom mount transducer location for Montauk
boatdryver posted 05-17-2006 10:37 AM ET (US)   Profile for boatdryver   Send Email to boatdryver  
I'm about to decide where to drill the new wholes in the transom to mount a new transducer and the complex shape of the Montauk bottom and the location of the trailer bunks is causing me to ask for advice.

The instructions say to avoid strakes or anything that might create turbulence. It looks like all the good places are too close to the trailer bunks until I get too close to the keel for comfort in case of a grounding.

The old transducer was centered in line with the outer sponson (couldn't this cause turbulence like a strake?) and worked fine. The new Garmin 498 transducer is very similar in shape-pretty wide.

Can anyone help me decide whether to put it where the old one was or go down closer to the keep where the hull shape is more conventional?

thanks, JimL

ratherwhalering posted 05-17-2006 01:22 PM ET (US)     Profile for ratherwhalering  Send Email to ratherwhalering     
Jim, you should seriously consider mounting a 1/2-inch piece of starboard to your transom, then mounting the transducer to the starboard. If you ever change transducers, you simply re-drill the starboard, not the transom again.

If you already have non-compatible holes, the solution is easy. Remove the old transducer. Take some clear 3-inch Scotch tape and stick it to the hull, covering the old holes. Mark the old hole positions on the Scotch tape. Place the starboard in the desired position, and trace the edges of the starboard on the Scotch tape. Remove the scotch tape from the hull, and stick it to the starboard, alligning the traced edges. Drill the holes in the starboard where marked on the Scotch tape. Mount the Starboard to the transom, and the new transducer to the starboard.

Here is everything you will ever need to know about mounting SONAR transducers...

http://continuouswave.com/whaler/reference/sonarTransducer.html

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