GPP ELECTROFISHER
5
www.smith-root.com
CON-
established an excellent
worldwide service organization.
Engine service is probably
available from an authorized
engine dealer near you: check
your Yellow Pages.
ENGINE GOVERNOR:
The engine
must be run at 3600 rpm to
supply the power it was designed
to produce. The governor on
the engine holds the speed as
nearly constant as possible. The
governor is set at the proper
speed in the factory. Do not
adjust the governor without
proper tools.
VOLTAGE VARIATION
: All engines
slow down when a load is applied.
When the electrical load on the
generator is increased, the engine
speed drops. This results in a
lower voltage when the generator
is loaded to its full capacity than
when running unloaded.
FREQUENCY VARIATION:
The AC
frequency is around 60 cycles per
second. The inevitable variations
in engine speed produce slight
variations in the AC frequency.
This has no noticeable effect on
the operation of motors, lights
and most appliances. However,
clocks and other timing devices
will not keep perfect time when
used on generators.
MODIFICATIONS to the power
supply that are not Smith-Root
authorized may impair the
function and safety of the unit.
POWER SUPPLY
CONTROLS
GENERATOR:
Your GPP
is powered by a specially
manufactured gas-powered
generator. The generator is
wound so that the output
voltages are taken directly from
the generator, eliminating the
need for a transformer or voltage-
doubler. The generator has a self-
excited revolving field. This rotor
connects directly to the engine
crankshaft with a tapered fit. The
stationary Stator has a separate
excitation winding, and multiple
windings to supply AC power.
12 VAC:
terminals on the
generator provide up to 500
watts of 12 volt AC power on
each circuit. This will run 12 volt
lights, or with an external rectifier
will recharge batteries. The 5.0,
7.5 and 9.0 GPP have two output
circuits.
ENGINE:
This instruction book
covers mainly the electrofisher
and the generator, but not
the engine. Please read all
instructions in the engine
manufacturer’s manual. The
engine manufacturer has
4-pin Anode
& Control Plug
4-pin Cathode
& Control Plug
1.5 kVA
Control
4-pin female
Output power
2 pin female
Input power
3-pin female
Type VI-A
Control
Input power
Output power
Control
Input power
Output power
Cathode
Anode
7.5 GPP
Control
4-pin female
Output power
7 pin female
Input power
7 pin male
2.5 GPP and 5.0 GPP
Control
Input power
Output power
Cathode
Anode
110V
4-pin
9.0 GPP
VVP-15B
Input
AC
Output
& Control
DC
Output
& Control
4-pin Anode
& Control Plug
4-pin Cathode
& Control Plug
1.5 kVA
Control
4-pin female
Output power
2 pin female
Input power
3-pin female
Type VI-A
Control
Input power
Output power
Control
Input power
Output power
Cathode
Anode
7.5 GPP
Control
4-pin female
Output power
7 pin female
Input power
7 pin male
2.5 GPP and 5.0 GPP
Control
Input power
Output power
Cathode
Anode
110V
4-pin
9.0 GPP
VVP-15B
Input
AC
Output
& Control
DC
Output
& Control
Xw1”
Xh”
Xw2”
2.5 - 5.0 GPP
2.5 - 5.0 GPP
Sm. Boat Mod
Control
4-pin female
Output power
7 pin female
Input power
7 pin male
Relative positions of input, output, and
control plugs on (A) 2.5-5.0, (B) 7.5 and
(C) 9.0 GPPs
A
B
C
