Engine Air Cooling System; Check Valve Clearance - Briggs & Stratton 30235 Operator's Manual

WARNING
Running engines produce heat.
Temperature of muffler and nearby areas
can reach or exceed 150°F (65°C).
Severe burns can occur on contact.
Exhaust heat/gases can ignite combustibles,
structures or damage fuel tank causing a fire.
• DO NOT touch hot surfaces and avoid hot exhaust gases.
• Allow equipment to cool before touching.
• Keep at least 5 ft. (152 cm) clearance on all sides of
generator including overhead.
• Code of Federal Regulation (CFR) Title 36 Parks, Forests,
and Public Property require equipment powered by an
internal combustion engine to have a spark arrester,
maintained in effective working order, complying to USDA
Forest service standard 5100-1C or later revision. In the
State of California a spark arrester is required under section
4442 of the California Public resources code. Other states
may have similar laws.
Clean and inspect the spark arrester as follows:
1. To remove muffler heat shield (A) from
muffler (B), remove four screws that connect
guard to muffler bracket (Figure 14).
B
Figure 14 — Service Spark Arrester
A - Heatshield
B - Muffler
C - Spark Arrester Screen
2. Remove four screws that attach spark arrester
screen (C).
3. Inspect screen and obtain a replacement if torn,
perforated or otherwise damaged. DO NOT use a
defective screen. If screen is not damaged, clean
it with commercial solvent.
4. Reattach screen and muffler guard.
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C
A

Engine Air 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 an authorized Briggs & Stratton service dealer
clean the cooling system (Figure 15) per
recommended intervals (see Maintenance Schedule
in the Maintenance section). Equally important is to
keep top of engine free from debris. Also see
Cleaning.
Figure 15 — Air Cooling System
A - Clean These Areas

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 (see Maintenance Schedule
in the Maintenance section).
Carburetor Adjustment
The carburetor on this engine is low emission. It is
equipped with a non-adjustable idle mixture valve.
Top speed has been set at the factory. If adjustment
is required, see an authorized service dealer.
CAUTION
Excessively high operating speeds increase risk of
injury and damage to generator.
Excessively low speeds impose a heavy load.
• 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.
A