good evening fellas,<br />i picked up a boat with no electronics,but the transducer is mounted on the back.<br />i plugged in my buddy's lowrance x51 it it worked fine.<br />my question is.....how do i find out what fish finder i need???<br />there is some great deals on e-bay units w/no <br />transducer or power cables.<br />is there a way to narrow down my search as the boat itself has just about broke me!!!<br />thanks<br />j.w