12
Owner’s Manual
173CC VIPER 4-CYCLE ENGINE
Get parts online at www.GetEarthquake.com or Call 800-345-6007 M-F 8-5 CST
OIL MAINTENANCE
After the rst 10 hours, or after the rst month of operating
a new Viper® Engine the oil should be replaced, and every 30
hours of operating time thereafter. The oil should be changed
every 10 hours if used under severe conditions, such as in
high temperatures or under heavy loads, otherwise changed
weekly. Check oil periodically; do not overll.
CHANGING OIL
Be sure the engine is not operating and is located on a level
surface before checking or relling oil. Engine should be warm
for easy removal of oil.
1. Detach spark plug wire and move away from spark plug. If
the engine uses a battery, disconnect at negative terminal.
SEE FIGURE 5.
2. Remove dipstick and carefully tip the engine toward the
dipstick side to empty oil from oil ll area. Empty oil into
a suitable oil container and dispose of oil properly. SEE
FIGURE 6.
3. Tip engine back onto a level surface and ll with
appropriate oil to the top of the marking on the dipstick.
SEE FIGURE 6.
4. Reinsert dipstick or oil ll cap and tighten.
AIR FILTER
Refer to maintenance schedule for suggestions on when to
service your air lter. Washing lter is not recommended.
When dirty, replace lter.
Removing/Installing Air Filter. SEE FIGURE 7.
1. Remove air cleaner cover.
2. Remove the air lter.
3. Replace with new air lter.
4. Replace air lter cover.
SPARK PLUG
The recommended spark plug is a DK7RTC. The spark plug is
located to the left of the valve cover. SEE FIGURE 5.
Checking And Changing Spark Plug
1. Check spark plug every 50 operating hours.
2. Disconnect the spark plug cap, and clean any debris from
around the spark plug area.
CAUTION
NEVER RUN ENGINE WITHOUT AIR FILTER PROPERLY
INSTALLED. ADDED WEAR AND ENGINE FAILURE MAY
OCCUR IF AIR FILTER IS NOT INSTALLED ON ENGINE.
FIGURE 5
spark plug cap
upper level
lower level
dipstick
oil ll area
FIGURE 6
air cleaner base
air lter element
air cleaner cover
FIGURE 7
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