leadcore troller

Lowrance was absolutely no help . Back home i troll leadcore in the local reserviors, so no motors it's row power only, so the upgraded electronic units are no help, the fish n temp or fish hawks spool type are the units that work best in this situation.

My unit is a bit more older, it was made in the 70's you need 2 glasses of water one hot and one with ice and theres 3 adjustable pots in the unit to calibrate it.

Hopefully someone here can help, Lowrance could'nt help me. I have a Lowrance Fish n Temp, about 30 yrs old, this unit needs to be calibrated but can't find the manual, does anyone have the booklet that tells you the proceedure for calibrating the unit.