J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Modern transducer that fits old Data Marine transducer tubes?

Dan - it's worth it to take the time to change out the tubes. The new xducer setup should have come with a check-valve tube for the paddle wheel so it makes it easier to pull and clean.

Best method to drill out the old tube is to force a wood dowel in the old tube so you can use a circular hole saw with a pilot bit to center it, drilling from the outside. As long as the boat is on the hard, this is an easy afternoon project. You'll be happy that you took the time to install the new xdcrs.