sorry.<br />Difference between aluminum 13 x 19 that came on motor new and the ballistic.<br /><br />the tach stopped zeroing, now when motor is shut off the needle is below the zero.The needle still move but the rpm is off .guess its time for a new one.<br /><br />who is BRP ?Originally posted by Dhadley:<br /> Can't tell much difference between the Ballistic and what? Let me know if you ever need another one. <br /><br />Use a good quality tach made for what you got. Trying to "make do" can lead you down the wrong path when setting up your rig. And with todays fuel that could get expensive. Get one from OMC or BRP, you'll not regret it.