Operator’s Manual
Viper® 340cc 4-Cycle Engine
13
Check for parts online at
www.ardisam.com
or call 800-345-6007 M-F 8-5
AIR
CLEANER
BASE
AIR
FILTER
ELEMENT
PRE-FILTER
AIR
CLEANER
COVER
!
Air Filter
Refer to maintenance schedule for suggestions on when to
service your air filter.
Washing filter is not recommended.
When dirty, replace filter (Viper P/N 10905).
Removing/Installing Air Filter
SEE FIGURE 6
1. Remove air cleaner cover.
2. Remove the pre-filter and air filter element.
3. Replace with new air filters.
4. Replace air filter cover.
Spark Plug
The recommended spark plug is a Torch DK7RTC (NGK
DCPR7E). 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.
3. Remove spark plug and replace if any of the following
occur; pitted electrodes, burned electrodes, cracked
porcelain, or deposits around electrodes.
4. After analysis, seat spark plug and tighten with spark plug
wrench to compress the sealing washer.
•
Reinstall original spark plug, tighten additional 1/2
turn.
•
Installing new spark plug, adjust spark plug gap to
0.032” (0.8 mm) and tighten additional 1/8 – 1/4 turn.
NOTE: Loose spark plug may overheat and damage
engine. Over tightened spark plug may damage
threads in the cylinder head.
Spark Plug Maintenance
Spark plug should be removed, cleaned and gap adjusted after
approximately fifty hours of operating time.
NOTE: A sand blaster should not be used to clean spark
plugs. Microscopic particles remaining in the plug
may score the engine cylinder during operation.
Use solvent and a wire brush to clean the plug and
compressed air to blow it out thoroughly.
Carburetor
•
Never tamper with factory setting of the carburetor.
•
Contact your service provider or Viper® if adjustment is
needed.
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 6.
Air Cleaner Assembly