6 Generac®Power Systems, Inc.
Section 1 – General Information
PRIMEPACT 55G and 55LP Recreational Vehicle Generators
1.6 SPECIFICATIONS

1.6.1 FUEL R EQUIREMENTS

This generator is equipped with a gasoline fuel system
as standard equipment. Specific installations may pro-
vide either a separate fuel tank for the generator, or the
generator may “share” the vehicle engine’s fuel tank.
NOTE
Some installations using a “shared” fuel tank may
have a generator fuel pickup tube that is shorter
than the vehicle engine’s pickup tube. Such an
arrangement causes the generator engine to “run
out of gas” while adequate fuel for the vehicle
remains in the tank.
To reduce lead and carbon deposits use high quality
UNLEADED gasoline with the generator. Leaded
REGULAR grade gasoline is an acceptable substitute.
NOTE:
Using unleaded gasoline contributes to longer engine
valve life by reducing lead and carbon deposits.
Generac does not recommend using any
gasoline containing alcohol (such as “gasohol”).
If you use any gasoline containing alcohol, it
must not contain more than 10 percent ethanol,
and it must be removed from the generator
during storage. Do NOT use any gasoline
containing methanol. If you use gasoline with
alcohol, inspect more frequently for fuel leaks
and other abnormalities.

1.6.2 ENGINE OI L REQUIREMENTS

Use only 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 rec-
ommended oil. Engine crankcase capacity is 1.4
liters. See Section 3.2 on page 11 for oil level check
and filing procedures.

1.6.3 ENGINE SP ECIFICATIONS

Type of Engine
PRIMEPACT 55G/55LP..............................................GN-480
Cooling Method ........................................................Air-cooled
Rated Horsepower
PRIMEPACT 55G/55LP ........................................15 at 3600
Displacement
PRIMEPACT 55G/55LP..................................................480cc
Compression Ratio........................................................8.6 to 1
Cylinder Block ..........................Aluminum w/Cast Iron Sleeve
Type of Governor ..............................Mechanical, Fixed Speed
Engine Governor Speed............................................2500 rpm
Air Cleaner ........................Paper Element w/Foam Precleaner
Starter ........................................................12-volt DC Electric
Ignition System ......................Solid- state w/Flywheel Magneto
Recommended Spark Plug
Champion ..................................................................RC12YC
AC....................................................................................R45S
Fram Autolite ......................................................................65
Spark Plug Gap........................................0.030 inch (0.8 mm)
Recommended Min. Battery............400 Cold Cranking Amps

1.6.4 EMISSIONS COMPLIANCE PER IOD

For nonhandled engines the Emissions Compliance
Period referred to on the Emissions Compliance
Label indicates the number of operating hours for
which the engine has been shown to meet Federal
emission requirements.
• For engines less than 225 cc displacement,
Category C=125 hours, B=250 hours, and A=500
hours.

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1.6.5 GENERATOR SPECIFICATIONS
SERIES PRIMEPACT 55G PRIMEPACT 55LP
Rotor RPM 3600 3600
Rotor Poles 2 2
Engine RPM 2500 2500
Rated Max.Continuous AC Output* 5500 watts (5.5 kW) 5200 watts (5.2 kW)
Voltage* 120 120
Rated Max.Continuous Current* 45.8 AC amps‡ 43.3 AC amps Ñ
Phase 1 1
Frequency 60 Hertz 60 Hertz
Battery Charging Current (Max.) 2 amps (trickle charge) 2 amps (trickle charge)
Weight 211 pounds 214 pounds
Length 25 inches 25.75 inches
Width 18.5 inches 18.5 inches
Height 16.13 inches 16.13 inches
* All units are reconnectable to 120 and/or 240 volts, dual voltage output.Units are not listed per RVIA/ANSI when reconnected for dual voltage output
‡ Rated maximum continuous current at 240 volts is 22.9 amps.
Ñ Rated maximum continuous current at 240 volts is 21.6 amps.
Model No Load 1/2 Load Full Load
PrimePact 55G 0.29 0.54 0.96
PrimePact 55LP 0.47/2.01 0.85/3.62 1.66/7.05