DYNA SERIES
Page 6
60707-101
compression stroke occurs. This minimizes the drain on
the battery and improves the possibility of starting under
such adverse conditions. Always keep the battery charged,
but especially during cold weather operation.
1. Turn on the fuel supply.
2. Move the choke to the full "on" position. A warm engine
will require less choking than a cold engine.
3. Engage the engine start switch briefly to the START
position. The starter life is improved by using shorter
starting cycles with time to cool off between cranking
cycles. Do not operate the starter more than 15 seconds
during each minute. Repeat if necessary.
4. When the engine starts, open the choke gradually.
5. The engine should promptly come up to operating
speed.
CAUTION: EQUIPMENT DAMAGE
Never permit the choke to remain on after the engine has
run for a short time. It is not necessary to choke the engine
when it is warm. Avoid over-choking.
STARTING HINTS
1. Cold weather
a. Use the proper oil for the temperature
expected.
b. Use fresh winter grade fuel. Winter grade
gasoline is blended to improve starting. Do not
use summer gasoline.
c. A slightly richer fuel mixture will usually
improve cold starting.
2. Hot weather
a. Use the proper oil for the temperature
expected.
b. Use only summer blended gasoline. Using
gasoline left over from winter may cause the unit
to vapor lock.
c. DO NOT over-choke the unit.
STOPPING AND STORAGE
1. Depress the metal stop strip on top of the engine to
‘ground out’ the spark.
2. Before extended storage (over 30 days) certain
precautions must be taken to ensure the fuel doesn’t
deteriorate and clog the fuel system. Note: The use of a
fuel additive, such as STA-BIL, or an equivalent, will
minimize the formation of gum deposits during storage.
Such an additive may be added to gasoline in the engine’s
fuel tank or to gasoline in a storage container.
a. Remove the remaining fuel from the fuel tank.
b. Start the engine and allow it to run until all
the fuel in the carburetor and the fuel lines has
been used up and the engine stops.
c. While the engine is warm, drain the oil and
refill with fresh oil.
d. Remove the spark plug, pour approximately
1/2 ounce (15 cc) of engine oil into the cylinder
and crank slowly to distribute oil. Replace spark
plug.
e. Clean dirt and chaff from cylinder, cylinder
head fins, blower housing, rotating screen and
muffler areas.
BASIC OPERATION
f.
Store in a clean and dry area.
OPERATING SPEED
The engine-generator must be run at the correct speed in
order to produce the proper electrical voltage and
frequency.
CAUTION: EQUIPMENT DAMAGE
The output voltage should be checked to insure the
generator is working properly prior to connecting a load
to the generator. Failure to do so could result in damage
to equipment plugged into the unit and possible injury to
the individual.
All engines have a tendency to slow down when a load is
applied. When the electrical load is connected to the
generator,the engine is more heavily loaded, and as a
result the speed drops slightly. This slight decrease in
speed, together with the voltage drop within the generator
itself, results in a slightly lower voltage when the
generator is loaded to its full capacity than when running
no load. The slight variation in speed also affects the
frequency of the output current. This frequency variation
has no appreciable effect in the operation of motors,
lights and most appliances. However, electronic
equipment and clocks will be affected if correct RPM is
not maintained. See Load vs. Output chart.
Although individual units and models may vary slightly, the
normal voltage and frequency of the engine-generators
described in this book are approximately as follows,
under varying loads:
LOAD vs. OUTPUT
__________________________________________________________________________________________________________________
Generator
Frequency Generator voltage
Load
Speed
(Hz)
120V
Applied*
(RPM)
Recpt.
__________________________________________________________________________________________________________________
None
3750
62.5
129V
Half
3600
60.0
120V
Full
3540
59.0
115V
__________________________________________________________________________________________________________________
*Portion of plant’s rated output current.
The speed of the engine was carefully adjusted at the
factory so that the generator produces the proper voltage
and frequency. For normal usage, the speed setting
should not be changed. If the generator is being run
continuously on a very light load, it is often advisable to
lower the operating speed slightly. Whenever making
any speed adjustments check the unit with a voltmeter or
tachometer and be sure the speed is correct.
Lower voltage may damage both the generator and any
load connected to it. Running the engine at excessively
high speeds results in high voltage, which may
significantly shorten the life of appliances being used.
Output voltage should be checked periodically to ensure
continued proper operation of the generating plant and
appliances. If the generator is not equipped with a
voltmeter, it can be checked with a portable meter.
Frequency can be checked by using an electric clock with
a sweep second hand. Timed against a wrist watch or a
stop watch the clock should be correct /- 2
seconds per minute.
