Servicing The Spark Plug - Briggs & Stratton VANGUARD 25V000 Manual Del Operador

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Not necessary unless engine problems occur.
Carburetor and Engine Speed
Do not make adjustments to the carburetor or engine speed. The carburetor was
set at the factory to operate satisfactorily in most conditions. Do not change the
governor spring, linkages, or other parts to adjust the engine speed. If adjustments
are necessary, contact a Briggs & Stratton Authorized Service Dealer for servicing.
NOTICE
The equipment manufacturer specifies the maximum speed for the engine as installed
on the equipment. Do not exceed this speed. If you are not sure what the equipment
maximum speed is, or what the engine speed is set to from the factory, contact a Briggs
& Stratton Authorized Service Dealer for assistance. For safe and correct operation
of the equipment, the engine speed should only be adjusted by a qualified service
technician.

Servicing the Spark Plug

Check the spark plug gap (A, Figure 19) with a wire gauge (B). If necessary, set the
spark plug gap. Install and tighten the spark plug to the correct torque. For gap and
torque specifications, refer to the Specifications section.
NOTE: In some areas, it is mandatory by local law that you use a resistor spark plug
to decrease ignition signals. If a resistor spark plug was installed by the equipment
manufacturer, use the same type for replacement.
Servicing the Exhaust System
WARNING
During operation, the engine and muffler become hot. If you touch a hot engine,
thermal burns can occur.
Combustible materials, such as leaves, grass and brush, can catch fire.
• Before you touch the engine or muffler, stop the engine and wait two (2)
minutes. Make sure that the engine and muffler are safe to touch.
• Remove debris from the muffler and engine.
It is a violation of California Public Resource Code, Section 4442, to use or operate the
engine on any forest-covered, brush-covered, or grass-covered land unless the exhaust
system is equipped with a spark arrester, as defined in section 4442, maintained in
effective working order. Other states or federal jurisdictions may have similar laws;
reference Federal Regulation 36 CFR Part 261.52. Contact the original equipment
manufacturer, retailer, or dealer to obtain a spark arrester designed for the exhaust
system installed on this engine.
Remove debris from the muffler and cylinder area. Inspect the muffler for cracks,
corrosion, or other damage. Remove the deflector or the spark arrester, if equipped, and
inspect for damage or carbon blockage. If damage is found, install the replacement parts
before you operate the equipment.
WARNING
Replacement parts must be of the same design and installed in the same position as the
original parts. Other parts could result in damage or an injury.
Change Engine Oil
WARNING
Fuel and its vapors are flammable and explosive. Fire or explosion could result in
burns or death.
During operation, the engine and muffler become hot. If you touch a hot engine,
thermal burns can occur.
• If you drain the oil from the top oil fill tube, the fuel tank must be empty. If it is not
empty, fuel leakage can occur and cause a fire or an explosion.
• Before you touch the engine or muffler, stop the engine and wait two (2)
minutes. Make sure that the engine and muffler are safe to touch.
Used oil is a hazardous waste product and must be discarded of correctly. Do not
discard with household waste. Contact your local authorities, service center, or dealer
for safe disposal or recycling facilities.
™
For Just Check & Add
models, an oil change is not necessary. If an oil change is
necessary, refer to the procedure that follows.
Remove Oil
1. With engine off but warm, disconnect the spark plug wire(s) (D, Figure 20) and keep
it away from the spark plug(s) (E).
2. Remove the dipstick (A, Figure 21).
3. The engine has two oil drain plugs (H, F, Figure 22). Remove the oil drain plugs (H,
F). Drain the oil into an approved container.
4. After the oil has drained, install and tighten the oil drain plug (F, Figure 22).
Add Oil
• Make sure the engine is level.
• Clean the oil fill area of all debris.
• Refer to the Specifications section for oil capacity.
1. Remove the dipstick. See Remove Oil section. Remove oil from the dipstick with a
clean cloth
2. The engine has two oil fills (C, G, Figure 23). Slowly add oil into one the engine oil
fills (C, G). Do not add too much oil. Wait one minute and then check the oil level.
3. Install the dipstick.
4. Remove the dipstick and check the oil level. The correct oil level is at the top of the
full indicator on the dipstick. See Check the Oil Level section.
5. Install and tighten the dipstick again.
6. Connect the spark plug wire(s) to the spark plug(s). See Remove Oil section.
Servicing the Air Filter
WARNING
Fuel vapors are flammable and explosive. Fire or explosion could result in burns
or death.
• Do not start and operate the engine with the air cleaner assembly (if equipped)
or the air filter (if equipped) removed.
NOTICE
Do not use pressurized air or solvents to clean the filter. Pressurized air could result in
damage to the filter and solvents will dissolve the filter.
See the Maintenance Schedule for service requirements.
Different models will use a foam or a paper filter. Some models could also have an
optional pre-cleaner that can be washed and used again. Compare the illustrations in
this manual with the type installed on your engine and service as follows.
Paper Air Filter
1. Loosen the fastener(s) (C, Figure 24).
2. Remove the cover (A, Figure 24) and the filter (B).
3. To loosen debris, lightly tap the filter (B, Figure 24) on a hard surface. If the filter is
dirty, replace it with a new filter.
4. Install the filter (B, Figure 24).
5. Install the cover (A, Figure 24) with the fastener(s) (C). Make sure that the
fastener(s) is tight.
Paper Air Filter - Low Profile
1. Move the latch (A, Figure 25) to unlock the cover (C).
2. Push in the tabs (B, Figure 25) and remove the cover (C).
3. Remove the filter (D, Figure 25).
4. To loosen debris, lightly tap the filter (D, Figure 25) on a hard surface. If the filter is
dirty, replace it with a new filter.
5. Install the filter (D, Figure 25).
6. Install the cover (C, Figure 25). Move the latch (A) to the locked position.
NOTE: Check the fit of the foam seal (E, Figure 25). Make sure that the perimeter foam
seal is correctly seated in the channel (F).
Servicing the Fuel System
WARNING
Fuel and its vapors are flammable and explosive. Fire or explosion could result in
burns or death.
• Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition
sources.
• Frequently examine the fuel lines, fuel tank, fuel cap, and connections for cracks
or leaks. Replace damaged parts.
• Before you clean or replace the fuel filter, drain the fuel tank or close the fuel
shut-off valve.
• If fuel spills, wait until it dries before you start the engine.
• Replacement parts must be of the same design and installed in the same
position as the original parts. Other parts could result in damage or an injury.
Fuel Strainer, if installed
1. Remove the fuel cap (A, Figure 26).
2. Remove the fuel strainer (B, Figure 26).
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