replacing original thru hull transducer in 95 330 sundancer

[Pcew73]

hi guys I need to replace the depth finder and transducer in my 1995 sundancer 330. Im looking for ideas of what you replaced yours with. How big is the transducer I need and how long does the transducer wire need to be to go back to the helm? Thank you in advance.

 

[MikeBravo]

I am replacing my c80 on my 2007 320DA with a new axiom 9 and my transducer since it no longer is reliable. Here is the transducer my Raymarine tech is using. Raymarine (Airmar B117) - 600 Watt Bronze Sonar Transducer Through-Hull, 39' cable at $240.00.

 

[Ned T.]

I recently replaced my nearly dead depth sounder with a Garmin Striker 4. It's 100 bucks all day long. Replaced the factory plastic through hull sensor with a brass Airmar B60 that has built-in tilt, about 175.00 delivered if you shop around. You'll need an adapter pigtail for that sensor to work with the Garmin. Setup works like a champ, I never lose the bottom. For future upgrades I can retain the Airmar and use a different sounder.

 

[Pcew73]

Sweet thank you guys

 

[Randolph Beasley]

hi guys I need to replace the depth finder and transducer in my 1995 sundancer 330. Im looking for ideas of what you replaced yours with. How big is the transducer I need and how long does the transducer wire need to be to go back to the helm? Thank you in advance.

Where is the transducer -in the engine compartment? I just bought a 96 Sundancer 330 and need to replace mine with a big airmar thru-hull B175. i'm thinking I can enlarge the same hole as the stock transducer. Thoughts?

 

[Creekwood]

Where is the transducer -in the engine compartment? I just bought a 96 Sundancer 330 and need to replace mine with a big airmar thru-hull B175. i'm thinking I can enlarge the same hole as the stock transducer. Thoughts?

There may be more than one transducer. On my 330 there was a Tridata unit with depth and speed as well as a Lowrance 3500 depth only. Two separate transducers. They are easy to find. They are in the engine room bilge and have thick black wire going to them.

When I replaced the one for the Lowrance, I did it on land (necessary of course). I used a concrete drill bit (the same size as a hole saw pilot bit) to drill straight into the transducer and through the ceramic element that is inside. That gave me a good pilot hole for the large hole saw I used to drill the much larger hole for my new Raymarine B60 brass. The new hole was much larger so it took out the old transducer and drilled the new hole at the same time. Worked perfectly.

 

[Randolph Beasley]

Thanks for that info! Yes our model has two transducers as well. The one for speed, which does not work, and the one for depth. I'm not sure if there's an advantage of replacing one versus the other with the through hull transducer B175 to use with the new Raymarine chartplotter we purchased. it certainly looks like those locations will be where Raymarine and AirMarr would recommend they be installed.

 

[Randolph Beasley]

Ok- I marked the proposed location of the B175 thru-hull transducer with black tape (closest to the bow on the left) and the current transducer installed by Sea Ray in the engine compartment (closest to the stern, on the right) for reference. is my proposed location of a new thru-hull transducer too much in the center of the boat where cavitation may occur?

 

[Creekwood]

What you need to avoid is anything in front of the transducer. There are a few water pickups on the bottom to avoid.
This is from the 330 Supplemental manual that shows where sea ray put the transducers and where the pickups are. You can see that they liked K and L for the two pickups. Anything past the two engine pickups B and I will risk interference either from cavitation from the pickup or disturbed pulsing water flow. I circled in red where my new one is installed. Seems to work fine installed there.

 

[Randolph Beasley]

Thank you for sharing especially this diagram. A great visual. We are leaning toward either replacing the current transducer after we confirm measurements or installing new transducer forward of the engine bulkhead.

BUT I'm concerned that forward of the engine bulkhead where it is much more accessible in a compartment underneath the cabin on the port side would result in potential cavitation issues to interfere with the transducer.