I'm needing a little advice. My new transducers for my Raymarine tridata use a 2" hole and mount flush against the exterior of the hull. The originals are 1 5/8 and sit in a countersunk recessed hole so they sit even with the hull. If I put a 2" hole in the center the flanged hole the new unit would catch the edge of the recessed part. Ok now you're lost an have no idea what I'm talking about, but it would just catch the edge leaving a big void behind it. Anybody ever deal with this and what would you do? Is it thinkable to sand off 1/4" of the edge of the transducer so it would go into the recessed hole?
Transducer mounting
- Thread starter Trucker Doug
- Start date
- Status
????
Well if I understand you the flange section of the old 1 5/8" hole is bigger than 2" and you want to sand off the transducer head so it will fit in the existing hole.
I'd drill the 2" and then epoxy around it so that there is no void. Alternately, you could build a "foil shaped" 1/4" fairing to cover the part of the transducer that sticks out. This is how most non-flush units handle making the water flow smoothly around the transducer.
I would not sand off parts of the transducer as there may be some harmonic with that size transducer that the sound waves need.
Well if I understand you the flange section of the old 1 5/8" hole is bigger than 2" and you want to sand off the transducer head so it will fit in the existing hole.
I'd drill the 2" and then epoxy around it so that there is no void. Alternately, you could build a "foil shaped" 1/4" fairing to cover the part of the transducer that sticks out. This is how most non-flush units handle making the water flow smoothly around the transducer.
I would not sand off parts of the transducer as there may be some harmonic with that size transducer that the sound waves need.
Why not use a forstner bit to make the recess the diameter of the new transducer. 
If you're going to plug the hole temporarily, so you can drill the larger diameter hole for the new transducer, use the plug to create the new, larger recess before drilling the new transducer hole.
BTW, if the hull is cored, make sure you pot the hole properly.
If you're going to plug the hole temporarily, so you can drill the larger diameter hole for the new transducer, use the plug to create the new, larger recess before drilling the new transducer hole.
BTW, if the hull is cored, make sure you pot the hole properly.
Here is a practical solution. You can even do this yourself. There is no need to ream out the old hole or to glass it and redrill.
http://marketplace.diynetwork.com/Product.aspx?Lid=3001-711119&From=iFP
http://marketplace.diynetwork.com/Product.aspx?Lid=3001-711119&From=iFP
- Status