Replacing The Spark Plug; Spark Arrestor; Service Air Filter; Valve Clearance - Generac Power Systems GP 3250 Owner's Manual

Figure 12 - Oil Drain, Check & Fill

3.3.6 REPLACING THE SPARK PLUG

Use spark plug F6TC, NGK BP6IS or Champioin RN11YC. Replace
the plug once each year. This will help the engine start easier and
run better.
1. Stop the engine and pull the spark plug wire off of the spark
plug.
2. Clean the area around the spark plug and remove it from the
cylinder head.
3. Set the spark plug's gap to 0.76 mm (0.030 in.). Install the
correctly gapped spark plug into the cylinder head and torque
to 15 ft/lbs. (Figure 13).
Figure 13 - Spark Plug Gap

3.3.7 SPARK ARRESTOR

The engine exhaust muffler has a spark arrestor screen. Inspect
and clean the screen at least once each year (Figure 14). If unit is
used regularly, inspect and clean more often.
If using the generator on any forest-covered, brush-covered
or grass-covered unimproved land, it must equipped with a
spark arrestor. The spark arrestor must be maintained in good
condition by the owner/operator.
Clean and inspect the spark arrestor as follows:
1. Remove clamp and spark arrestor from muffler.
2. 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.
NOTICE:
3. Replace the spark arrestor and clamp.
Figure 14 - Spark Arrestor
Muffler

3.4 SERVICE AIR FILTER

The engine will not run properly and may be damaged if using a
dirty air filter. Clean the air filter every 25 hours (Figure 15). Clean
or replace more often if operating under dusty conditions.
1. Remove air filter cover.
2. Wash in soapy water. Squeeze filter dry in clean cloth (DO
NOT TWIST).
3. Clean air filter cover before re-installing it.
Figure 15 - Air Filter
UNLOCK MOVE TO
COVER THE RIGHT

3.5 VALVE CLEARANCE

• Intake — 0.10 ± 0.02mm (cold), (0.004" ± 0.0008" inches)
• Exhaust — 0.15 ± 0.02mm (cold) (0.006" ± 0.0008" inches)
After the first 50 hours of operation, check the valve clearance
in the engine and adjust if necessary.
Important: If feeling uncomfortable about doing this procedure or
the proper tools are not available, please take the generator to the
nearest service center to have the valve clearance adjusted. This is
a very important step to ensure longest life for the engine.
Maintenance
Clamp
Screen
AIR
FILTER
AIR FILTER
COVER
11