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Recreational Vehicle Generator
FUEL REQUIREMENTS
The “NP” series generator is equipped with a liquefied petro-
leum (LP) gas fuel system. LP gas is usually supplied as a
liquid in pressure tanks.
“NP” series generators require a “vapor withdrawal” type fuel
system. This type of gaseous fuel system uses the vapors
forming above the liquid fuel in the storage tank. Air temper-
ature around the storage tank must be high enough to sustain
adequate fuel vaporization. In colder climates, you may need
to use an independent heat source to be sure the fuel suffi-
ciently vaporizes in the storage tank.
LP gas may consist of propane, butane or a mixture of two
gases. Using fresh HD-5 LP is recommended. Fuel should
not contain more than 2.5% butane. Propane vaporizes at tem-
peratures as low as -20°F (-29°C), but butane returns to its
liquid state when the temperature drops below about 32°F
(0°C). For that reason, a higher ratio of propane is desired in
the gas mixture when temperatures drop below freezing.
FUEL CONSUMPTION
(CUBIC FEET PER HOUR)
The following lists the approximate amount of fuel the unit con-
sumes at 100% rated load. Actual fuel consumption may
vary depending on BTU content of fuel, applied load, ambi-
ent conditions, engine condition, etc.
Propane ..............................................47 cubic ft. per hour
ENGINE OIL REQUIREMENTS
Use a high quality detergent oil classified “For Service SF” and
with an oil viscosity rating of SAE 10W-30 oil. Do not pour in
any additives to the recommended oil. Engine crankcase
capacity is 1.5 U.S. quarts (1.4 liters). See MAINTENANCE
section for oil level check and filling procedures.
SPECIFICATIONS
ENGINE
Type of Engine ....................................................GN-410, single-cylinder
Cooling Method ........................................................................Air-cooled
Rated Horsepower..........................................................15 at 4200 RPM
Displacement ..................................................................................407cc
Cylinder Block ........................................Aluminum with cast iron sleeve
Type of Governor ................................................Mechanical, fixed speed
Air Cleaner ....................................Paper element with foam pre-cleaner
Starter..........................................................................12 volt DC electric
Ignition System........................................................................Solid State
Recommended Spark Plugs
Champion................................................................................RC12YC
AC ................................................................................................R45S
Autolite ..............................................................................................65
Spark Plug Gap........................................................0.030 inch (0.76mm)
GENERATOR
Rotor RPM ........................................................................................3600
Rotor Poles..............................................................................................2
Engine RPM......................................................................................2571
Rated Maximum Continuous
AC Output ................................................................4500 watts (4.5 kW)
Voltage ......................................................................................120 volts*
Rated Maximum Continuous AC Current............................37.5 amperes
Phase ..............................................................................................single
Frequency....................................................................................60 Hertz
Weight ...................................................................... 197 pounds (93 kg)
Length ...................................................................... 25 inches (635mm)
Width...................................................................... 18.5 inches (470mm)
Height ....................................................................15.75 inches(400mm)
* The unit is reconnectable to 120 and/or 240 volts, dual voltage output.
Rated maximum continuous current at 240 volts is 18.8 amps.
Generac NP-50LPG Recreational Vehicle Generator
GENERAC
®
CORPORATION