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MAINTENANCE
17
Clean and inspect the spark arrester as follows:
• Remove spark arrester screen for cleaning and inspection
(Figure 13).
• Inspect screen and replace if torn, perforated or
otherwise damaged. DO NOT use a defective screen. If
screen is not damaged, clean it with commercial solvent.
• Reattach spark arrester screen to muffler.
Servicing Spark Plug
Change the spark plug every 100 hours of operation or
once each year, whichever comes first.This will help your
engine to start easier and run better.
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. Check electrode gap with wire feeler gauge and set
spark plug gap to 0.030 inch (0.76mm) if necessary
(Figure 14).
4. Replace spark plug if electrodes are pitted, burned or
porcelain is cracked. Use a recommended replacement
plug.
5. Install spark plug and tighten firmly.
Clean Cooling System
Over time debris may accumulate in cylinder cooling fins
and cannot be observed without partial engine disassembly.
For this reason, we recommend you have a authorized
service dealer clean the cooling system (Figure 15) per
recommended intervals (see “Maintenance Schedule” on
page 14). Equally important is to keep top of engine free
from debris. See “Generator Cleaning”.
Check Valve Clearance
Regular valve clearance check and adjustment will improve
performance and extend engine life.This procedure cannot
be done without partial engine disassembly and the use of
special tools. For this reason we recommend that you have
an authorized service dealer check and adjust valve
clearance at recommended intervals.
Carburetor Adjustment
The carburetor on this engine is low emission. It is
equipped with a non-adjustable idle mixture valve and
governed idle, if equipped. Governed idle and top speed
have been set at the factory. If adjustment is required, see a
authorized service dealer.
• DO NOT tamper with governed speed. Generator supplies
correct rated frequency and voltage when running at governed
speed.
• DO NOT modify generator in any way.
Excessively high operating speeds increase risk of injury
and damage to generator.
Excessively low speeds impose a heavy load.
CAUTION
Figure 15 — Air Cooling System
Clean
Figure 13 - Spark Arrester
Typical Spark
Arrester Shown
Figure 14 — Service Spark Plug