20
500Wi OM
5. MAINTENANCE
The purpose of the maintenance and adjustment schedule is to keep the generator in the best possible operating
condition.
Inspect or service as scheduled in the table below.
There are no special operating instructions for the break in period for the engine, but the oil should be changed
between the first 4 to 6 hours of operation to remove any manufacturing debris or contamination.
Shut off the engine before performing any maintenance. If the engine must be run, make
sure the area is well ventilated. The exhaust contains poisonous carbon monoxide gas.
Use genuine POWERHOUSE® parts or their equivalent. The use of replacement parts
which are not of equivalent quality may damage the generator.
When repairing or replacing components of the emission control system, only use parts
known to comply with EPA standards.
5.1 Emission control system
Emission source
Exhaust gas contains carbon monoxide, nitrogen oxides (NO
X
), and hydrocarbons. It is very important to control
the emissions of NO
X
and hydrocarbons as they are a major contributor to air pollution. Carbon monoxide is a
poisonous gas. The emission of fuel vapors is a source of pollution as well. The POWERHOUSE® generator
engine utilizes a precise air-fuel ratio and emission control system to reduce the emissions of carbon monoxide,
NO
X
, hydrocarbons, and evaporative fuel emissions.
Regulation
Your engine has been designed to meet current Environmental Protection Agency (EPA) and the California Air
Resources Board (CARB) clean air standards. The regulations dictate that the manufacturer provides operation
and maintenance standards regarding the emission control system. Tune up specifications are provided in the
Specifications section and a description of the emission control system may be found in the appendix to this
manual. Adherence to the following instructions will ensure your engine meets the emission control standards.
Modification
Modification of the emission control system may lead to increased emissions. Modification is defined as the
following:
Disassembling or modifying the function or parts of the intake, fuel, or exhaust system.
Modifying or destroying the speed governing function of the generator.
Engine faults that may affect emission
Any of the following faults must be repaired immediately. Consult with your authorized POWERHOUSE® service
center for diagnosis and repair:
Hard starting or shut down after starting.
Unstable idle speed.
Shut down or backfire after applying an electrical load.
Backfire.
Black smoke and/or excessive fuel consumption.
Replacement parts and accessories
The parts making up the emission control system supplied with the POWERHOUSE® engine have been
specifically approved and certified by the regulatory agencies. You can trust that replacement parts supplied by
POWERHOUSE® have been manufactured to the same production standard as the original parts. The use of
replacement parts or accessories which are not designed by POWERHOUSE® may affect the engine emission
performance. The manufacturers of replacement parts and accessories have the responsibility to guarantee that
their replacement products will not adversely affect emission performance.
