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Before you try to diagnose a generator problem, check the engine to make sure that it
has been serviced and is operating correctly. Perform proper maintenance and tune-up
procedures before evaluating the generator.
Check the engine governor to ensure the
engine remains at a stable rpm when electrical
loads are applied. The generator engine's
governed rpm isn't as critical for power tools
and resistance loads, such as electric wire
heaters, as it is for machines tuned to 60 cycles
per second (cps) current. For example, if an
engine must run at 3,600 rpm, it must have a
60-cps current to time it. If the current is 61 cps,
the engine would run at 3,660 (61 cycles x 60
seconds) rpm.
Having a volt-ohm meter (VOM) that accurately measures alternating current is a
must when servicing generators.
The first step in generator troubleshooting is to conduct a
visual inspection before doing any electrical tests. Looking
the generator over carefully should expose any
environmental factors that might contribute to the problem.
As you remove the generator control box cover and begin
your inspection, look for the following:
1. Rusted or corroded connections. An oxidized connection will prevent the circuit
from being completed. This applies not only to the major cables externally, but
also to the electronic control devices internally.
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Multiquip Inc. ◦ GA Series Generators ◦ Manual No. GAGENSM
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