Transducer causing cavitation? No kidding???

[DuPont Spinner]

I read a previous post where the transducer was causing cavitation when turning. If you were to look at the back of my boat, the transducer is mounted on the left. When I make a right turn the motor cavitates. When turning to the left, all is well. The transducer is for a Garmin 160. Can that little itty-bitty thing really cause so much trouble? I have a 13ft. boat similar to a Livingston. It's called a Sportcat and I have a 9.9hp Suzuki with the cavitation plate mounted even with the bottom of the hull. Like I stated before, cavitation only happens when turning right. Any comments will be most welcome. DuPont

 

[DJ]

Re: Transducer causing cavitation? No kidding???

DS,<br /><br />You must have that transducer set pretty deep for it to throw that much H20.<br /><br />Move it up a bit

 

[DuPont Spinner]

Re: Transducer causing cavitation? No kidding???

DJ19: The transducer is mounted so that the bottom of it is about 1 inch below the hull. If I remember correctly, this is the proper depth so air bubbles don't cause interference. DuPont

 

[walleyehed]

Re: Transducer causing cavitation? No kidding???

The transducer shoul be NO CLOSER than 4" from the imaginary cirle ,or diameter of the prop in relation to fwd movement and yes, that little thing will cause Ventalation.......

 

[roscoe]

Re: Transducer causing cavitation? No kidding???

You might want to remount the transducer, farther away from the engine. Or move it to the right side of the boat.<br /><br />Also, 9.9hp- tiller?, take into account that you may be making tighter right hand turns than left handers, because of the tiller, and you are sitting on the right side, which may cause the boat to roll over a bit more.

 

[walleyehed]

Re: Transducer causing cavitation? No kidding???

By the way, I have a Garmin 240, and it recomends 1/4" below for fibreglass, and 3/8"-1/2" for aluminum hulls........

 

[DuPont Spinner]

Re: Transducer causing cavitation? No kidding???

Gentlemen: Thanks for the responses. More will be welcome. I think I'll raise the transducer a bit. My big butt is on the right side of the boat so that may some of the cause as well. Keep the responses coming. The more I visit this site the more I learn. DuPont

 

[Dhadley]

Re: Transducer causing cavitation? No kidding???

Since you are going to remount it anyway, take the boat for a quick trial when you remove it but before you remount it. Theres your baseline.<br /><br />Ah, another reason to go boating today!

 

[Jack Shellac]

Re: Transducer causing cavitation? No kidding???

Dhadley always has good ideas. Get your baseline first. What may be happening is that the transducer starts ventilating the prop first. The air bubbles join with the exhaust and it starts cavitating. Props are strange creatures. If it can happen, it will. To make it worse, you can't see it happen, because it's underwater {hopefully, anyway}.

 

[Dhadley]

Re: Transducer causing cavitation? No kidding???

Uh, oh yeah - the baseline is a good idea too. I was thinking the good idea was another excuse to go boating. Lol!<br /><br />Thanks Jack!!