Guardian Technologies 4390, 4456, 4389, 4760, 4759, 4758 manual General, Fuel Requirements

SECTION 1.3

PREPARATION BEFORE USE

PART 1

GENERAL INFORMATION

GENERAL ENGINE OIL RECOMMENDATIONS

The installer must ensure that the home standby generator has been properly installed. The system must be inspected carefully following installation. All applicable codes, standards and regulations pertaining to such installations must be strictly complied with. In addition, regulations established by the Occupational Safety and Health Administration (OSHA) must be complied with.

Prior to initial startup of the unit, the installer must ensure that the engine-generator has been properly prepared for use. This includes the following:

❏An adequate supply of the correct fuel must be available for generator operation.

❏The engine must be properly serviced with the recommended oil.

FUEL REQUIREMENTS

Generators with air-cooled engine have been factory tested and adjusted using natural gas as a fuel. If LP (propane) gas is to be used at the installation site, adjustment of the generator fuel regulator will be required for best performance. Refer to Test 63, "Check Fuel Regulator" on Page 4.4-16 for fuel regulator adjustment procedures.

❏When natural gas is used as a fuel, it should be rated at least 1000 BTU’s per cubic foot.

❏When LP (propane) gas is used as a fuel, it should be rated at 2520 BTU’s per cubic foot.

The primary recommended oil for units with air-cooled, single cylinder or V-Twin engines is synthetic oil. Synthetic oil provides easier starts in cold weather and maximum engine protection in hot weather. Use high quality detergent oil that meets or exceeds API (American Petroleum Institute) Service class SG, SH, or SJ requirements for gasoline engines. The following chart lists recommended viscosity ranges for the lowest anticipated ambient temperatures.

Engine crankcase oil capacities for the engines covered in this manual can be found in the specifications section at the beginning of the book.

LOWEST ANTICIPATED	AIR COOLED ENGINE
AMBIENT TEMPERATURE	RECOMMENDED OIL
Above 60 F. (16 C.)	Use SAE 30 oil
20 -59 F. (-7 to 15 C.)	Use SAE 10W-30 oil
Below 20 F. (-7 C.)	SAE 5W-20/5W-30 oil
For all seasons	Use SAE 5W-30
	Synthetic oil

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