Viper 173CC Owner's Manual page 12

OIL MAINTENANCE
After the first 10 hours, or after the first 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 overfill.
CHANGING OIL
Be sure the engine is not operating and is located on a level
surface before checking or refilling 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 fill 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 fill with
appropriate oil to the top of the marking on the dipstick.
SEE FIGURE 6.
4. Reinsert dipstick or oil fill cap and tighten.
AIR FILTER
Refer to maintenance schedule for suggestions on when to
service your air filter. Washing filter is not recommended.
When dirty, replace filter.
Removing/Installing Air Filter. SEE FIGURE 7.
1. Remove air cleaner cover.
2. Remove the air filter.
3. Replace with new air filter.
4. Replace air filter 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.
12 Get parts online at www.GetEarthquake.com or Call 800-345-6007 M-F 8-5 CST
CAUTION
NEVER RUN ENGINE WITHOUT AIR FILTER PROPERLY
INSTALLED. ADDED WEAR AND ENGINE FAILURE MAY
OCCUR IF AIR FILTER IS NOT INSTALLED ON ENGINE.
spark plug cap
upper level
lower level
air cleaner base
air filter element
Owner's Manual
173CC VIPER 4-CYCLE ENGINE
FIGURE 5
dipstick
oil fill area
FIGURE 6
air cleaner cover
FIGURE 7