Owner`s manual

Owner’s Manual 25
Voltmaster Engine-Driven Generators
3.2.5 First-time use
Break-in period
Controlled break-in helps to ensure satisfactory service from the
generator.
D-Series diesel models
During the first 5 to 10 hours of operation, operate the generator
with electrical loads from 25 to 50 percent of the generator’s rated
capacity (indicated on the generator serial number tag). This will
ensure the valves are properly seated. After the first 10 hours of
operation, change the oil and oil filter.
Operating the diesel generator with insufficient load, referred to as
“wet stacking,” will damage the engine and void the warranty (see
“D-Series diesel models” on page 23).
All other models
During the first 2 to 3 hours of operation, do not apply heavy
electrical loads to the generator.
Change the oil after the first 3 hours of operation.
Fuel mixture for LN-Series
Before using the LN-Series (liquid-propane- or natural-gas-fueled)
generator for the first time, adjust the fuel mixture for proper
engine performance. Refer to Figure 3-2 and follow these steps:
1. Start the engine.
2. Set a multimeter to measure hertz (Hz) and insert its probes into
one of the generator’s 120VAC receptacles.
3. Loosen the fuel mixture nut.
4. Rotate the fuel mixture adjustment screw:
■ Counterclockwise for richer mixture (lower altitudes)
■ Clockwise for leaner mixture (higher altitudes)
5. Adjust the fuel mixture screw until the multimeter reads 60 Hz,
which ensures optimal generator performance at full speed and
maximum load.
6. After adjusting the fuel mixture, tighten the fuel mixture nut to lock
the adjustment screw in place.