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6 Vehicle or Boat Engine Starting
Assistance
Jump-Starting Direct to the Battery
xPower300 may be used to jump-start a 12-volt vehicle or small
boat engine using the Jump-Start Cable supplied. Jump-
starting causes very high current surges and possible
sparking. Unless care is taken, the possibility of battery
explosion exists. Read the safety warnings in the beginning of
this guide before proceeding, then follow these instructions
exactly.
1. Turn off the vehicle or boat ignition, and all accessories.
2. Engage the park or emergency brake and place the transmission
in park or neutral.
3. If jump-starting a boat engine, purge the engine compartment
and bilge of all fumes before jump-starting.
4. Lay xPower300 on its back on a flat stable surface near the
battery and clear of all moving parts of the engine.
5. Do not connect the Jump-Start Cable to xPower300 yet. Connect
its red positive (+) clamp to the positive (+) terminal of the
engine battery.
WARNING: Connecting to the negative terminal can lead to a
battery explosion later in this procedure. The batterys positive
terminal is identified as being larger in diameter than the negative
terminal. In most vehicles it has a red wire connected to it. Do
not proceed until you are sure you have connected to the positive
terminal.
6. Connect the black negative (-) clamp to the engine block, cylinder
head, or other stationary heavy metal part of the motor, as far
from the battery as possible. Do not attach the black negative
clamp to the battery terminal.
7. Making sure that the cables are clear of belts and fans, plug the
Jump-Start Cable into the High-Power DC Connector on the
lower left side of xPower300, and start the engine.
8. If the vehicle fails to crank, unplug the Jump-Start Cable from
xPower300, then disconnect the jumper cable clamps. Ensure
that the contact area is clean, then repeat steps 5 through 7.