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TO CHARGE YOUR BATTERY:
Your battery has a wiring harness attached to it that has “piggyback” terminals on it, enabling you
to keep the power cord from the unit attached to the battery at all times, as well as having the
wiring harness with receptacle for your charger attached at all times. To charge, simply couple the
end of the charger with the end of the wiring harness. It is normal for a green light to appear on the
charger at this time if the charger is plugged into the battery only. It is also normal for the light on
the charger to be green if it is just plugged into the wall. When it is plugged into the wall and
battery, you will see a red LED light appear on the charger. If the light is red, the battery is being
charged. When your battery is fully charged, this red light should change to green. If it is time to
go fishing and the light has not turned green, go fish and try to allow a longer charging period next
time.
Batteries are an expendable item, and must be replaced periodically. The batteries that we use are
the “Sealed Lead Acid” variety, they are 12 volts, and range from 7 to 9 amps. The more amps the
battery has, the longer it will run on a full charge. Your MarCum can be powered off of any battery
that is 12 volts, even a large automotive or deep cycle battery.
If you are having difficulty with the charging process, please see the
Troubleshooting on our
website, www.marcumtech.com/support.
If you need to remove the battery, slide the power cord leads from the battery. Remove the strap
that is holding the battery in place and lift the battery out. To replace the battery, place a new
battery of similar specifications into the battery compartment and secure it with the Velcro strap
and re-connect the positive and negative terminals.
Ice System Set-Up
Your M3 comes virtually ready to fish. All you need to do is hook up the positive lead from the M3
power cord to the battery. Your M3 is delivered with a charged battery, so you can take it fishing
right away. Inside the M3 deluxe softcase is an electronics shuttle that has recessed compart-
ments for the battery and the single beam transducer. Take the transducer out of the recessed
holder and rotate the adjustable ice arm out from inside the shuttle. The adjustable ice arm allows
for maximum flexibility in positioning the M3 around the ice hole.
SETTING THE TRANSDUCER FOR ICE FISHING:
When used in conjunction with the retractable pivoting transducer arm and rubber stopper, the
M3’s transducer will automatically level itself in your ice hole. To begin operation, take the
transducer out of the recessed holder, and rotate the adjustable ice arm out from inside the shuttle.
Extend the transducer arm, (the cable should already be threaded through it with stopper in place)
and deploy the transducer into the water. We recommend setting your stopper to have the
transducer down the least amount possible. The MarCum M3 puts out enough power that in most
cases it is not necessary to have your transducer down more than a few inches below the water
line to get a good reading. When the ice thickness is over two feet, it may be necessary to have
your transducer set somewhat farther down. Remember--the less transducer cable you have out,
the easier it is to pull it out of the water when bringing in a fish, or to move to a new location. Under
no circumstances should you ever have the ducer below the ice—this can lead to the ducer
becoming damaged. It is also important that you keep the cable near the center of the ice hole. We
frequently hear from anglers who allowed their cable to freeze into the side of the ice hole. If this
should happen to you, make sure the unit is turned off before attempting to chisel it out. If you
accidentally cut the ducer cable, do not try to use that ducer again.
