
Rev. - 922124-01
2
GENERAL INFORMATION
The purpose of this manual is to assist you in installing, op-
erating and maintaining your GPI M-150S 12-volt DC pump,
with manual or automatic nozzle.
An automatic bypass valve prevents pressure build up
when the pump is on with the nozzle closed. To avoid
damage, do not run the pump more than 10 minutes with
the nozzle closed.
The duty cycle of this pump is 30 minutes ON and 30 minutes
OFF. Allow the pump to cool for 30 minutes.
This pump is designed for use only with gasoline (up to 15%
alcohol blends such as E15), diesel fuel (up to 20% biodiesel
blends such as B20) and kerosene. Do not use this pump
for dispensing any uids other than those for which it was
designed. To do so may damage pump components and will
void the warranty.
This pump is designed to operate on a typical DC automotive
electrical system. The pump is designed to operate with the
appropriate DC voltage at the motor leads and the ratings
are determined at this voltage. Performance may vary due
to length of power cord, battery condition or output from the
vehicle charging system that will affect system voltage.
Do not leave the system running without uids. “Dry running”
can damage the pump.
Do not pump the tank completely dry, as contaminants from
the bottom of the tank may enter the pump.
SAFETY INSTRUCTIONS
The following safety alert symbols are used in this
manual. Obey all safety messages that follow this
symbol to avoid possible injury or death.
DANGER
DANGER indicates a haz-
ardous situation which, if not
avoided, will result in serious
injury or death.
WARNING WARNING indicates a haz-
ardous situation which, if
not avoided, could result in
serious injury or death.
CAUTION CAUTION indicates a haz-
ardous situation which, if not
avoided, may result in minor
or moderate injury.
It is your responsibility to:
• know and follow applicable national, state, and local safe-
ty codes pertaining to installing and operating electrical
equipment for use with ammable liquids.
• know and follow all safety precautions when handling
petroleum fuels.
• ensure that all equipment operators have access to
adequate instructions concerning safe operating and
maintenance procedures.
Observe all safety precautions concerning safe handling of
petroleum fuels.
To ensure safe operation, all fuel transfer systems must be
properly grounded. Proper grounding means a continuous
metal-to-metal contact from one component to the next,
including tank, bung, pump, meter, lter, hose and nozzle.
Care should be taken to ensure proper grounding during initial
installation and after any service or repair procedures. For your
safety, please take a moment to review the warnings below.
To prevent physical injury, observe precautions against re or
explosion when dispensing fuel. Do not operate the system
in the presence of any source of ignition including running
or hot engines, lighted cigarettes, or gas or electric heaters.
Observe precautions against electrical shock when operating
the system. Serious or fatal shock can result from operating
electrical equipment in damp or wet locations.
Inspect external pump wiring regularly to make sure it is
correctly attached to the battery. To avoid electrical shock,
use extra care when connecting the pump to power.
Avoid prolonged skin contact with petroleum fuels. Use
protective goggles, gloves and aprons in case of splashing
or spills. Change saturated clothing and wash skin promptly
with soap and water.
Observe precautions against electrical shock when servicing
the pump. Always disconnect power before repairing or
servicing. Never apply electrical power to the system when
any of the coverplates are removed.
If using solvent to clean pump components or tank, observe
the solvent manufacturer’s recommendations for safe use
and disposal.
INSTALLATION
This pump is designed to self-prime with dry gears. Expect
suction lift as follows:
Manual Nozzle: 5.5 feet (1.7 m) with diesel
6.7 feet (2.1 m) with gasoline
Automatic Nozzle: 4.8 feet (1.5 m) with diesel
5.8 feet (1.8 m) with gasoline
If you require a greater initial prime height, coat the gears
with uid by removing the plug on the top of the pump and
pour a small quantity of motor oil into the gear cavity. Replace
the plug and try again. A foot valve with pressure relief may
be needed to maintain prime.
Make sure all threaded fuel connections are wrapped with
three to four turns of thread tape or a pipe thread sealant
approved for use with petroleum fuels.
Install Bung Adapter and Suction Pipe
• Tighten the bung adapter snugly into the fuel tank.
• Place the union ring gasket into the inlet tting on the
bottom of the pump.
• Thread the suction pipe into the inlet tting and tighten
until snug.