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2.
Slowly add oil into one of the engine oil fills (E, F, Figure 5). Do not add too much
oil.
3.
Install the dipstick (A, B, C, Figure 4).
a.
Extended Dipstick, if installed (B, Figure 4): Make sure that the oil fill marks on
the dipstick (B) point to the top of the engine.
b.
Short Dipstick or Dipstick Fill Plug, if installed (C, Figure 4): Turn and tighten
the dipstick (C).
4.
Remove the dipstick (A, B, C, Figure 4) again.
5.
Check the oil level. Make sure that the correct oil level is at the top of the full
indicator (D, Figure 4).
6.
Install the dipstick again (A, B, C, Figure 4).
7.
Connect the spark plug wire (D, 10) to the spark plug (E). For engine models that
have a heat shield (Figure 11) connect the spark plug wire as follows:
a.
Install the connector (B, Figure 11).
b.
Lock the red tab (A, Figure 11).
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 servicing requirements.
Different models will use a foam or a paper filter. Some models could also have an
optional pre-cleaner that can be cleaned 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 14).
2.
Remove the cover (A, Figure 14) and the filter (B).
3.
To loosen debris, lightly tap the filter (B, Figure 14) on a hard surface. If the filter is
dirty, replace it with a new filter.
4.
Install the filter (B, Figure 14).
5.
Install the cover (A, Figure 14) with the fastener(s) (C). Make sure that the
fastener(s) is tight.
Paper Air Filter - Low Profile
1.
Move the latch (A, Figure 15) to unlock the cover (C).
2.
Push in the tabs (B, Figure 15) and remove the cover (C).
3.
Remove the filter (D, Figure 15).
4.
To loosen debris, lightly tap the filter (D, Figure 15) on a hard surface. If the filter is
dirty, replace it with a new filter.
5.
Install the filter (D, Figure 15).
6.
Install the cover (C, Figure 15). Move the latch (A) to the locked position.
NOTE: Check the fit of the foam seal (E, Figure 15). 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.
•
If fuel spills, wait until it dries before you start the engine.
Fuel Filter, if installed
1.
Before you replace the fuel filter (A, Figure 16), drain the fuel tank or close the fuel
shut-off valve. If the fuel tank is not drained, fuel leakage can occur and cause a fire
or explosion.
2.
Squeeze the tabs (B, Figure 16) on the clamps (C) with pliers. Move the clamps
away from the fuel filter (A).
8
3.
Twist and pull the fuel lines (D, Figure 16) off of the fuel filter.
4.
Examine the fuel lines (D, Figure 16) for cracks or leaks. If it is necessary, replace
the fuel lines.
5.
Replace the fuel filter (A, Figure 16).
6.
Attach the fuel lines (D, Figure 16) with clamps (C).
Fuel Strainer, if installed
1.
Remove the fuel cap (A, Figure 17).
2.
Remove the fuel strainer (B, Figure 17).
3.
If the fuel strainer is dirty, clean or replace it. If you replace the fuel strainer, make
sure to use an original equipment replacement fuel strainer.
Storage
Fuel System
Refer to Figure: 18.
WARNING
Fuel and its vapors are flammable and explosive. Fire or explosion could result in
burns or death.
Fuel Storage
•
Because pilot lights or other ignition sources can cause explosions, keep fuel or
equipment away from furnaces, stoves, water heaters or other appliances that
have pilot lights.
Keep the engine level at the correct operating position. Fill the fuel tank (A, Figure 18)
with fuel. For fuel expansion, do not fill above the fuel tank neck (B).
Fuel can become stale when kept in a storage container for more than 30 days.
An alcohol-free fuel stabilizer and ethanol treatment in the fuel storage container
is recommended. This keeps fuel fresh and decreases fuel-related problems or
contamination in the fuel system.
When you fill the container with fuel, add an alcohol-free fuel stabilizer to the specified
instructions. If gasoline in the engine has not been treated with a fuel stabilizer, it must
be drained into an approved container. Operate the engine until it is out of fuel.
Engine Oil
While the engine is still warm, change the engine oil. Refer to Change the Engine Oil
section.
Troubleshooting
Assistance
For assistance, contact your local dealer or go to BRIGGSandSTRATTON.COM or call
1-800-444-7774 (in USA).
Specifications and Service Parts
Model: 25E300
Displacement
Bore
Stroke
Oil Capacity
Spark Plug Gap
Spark Plug Torque
Speed Sensor Air Gap
Intake Valve Clearance
Exhaust Valve Clearance
Engine power will decrease 3.5% for each 1,000 feet (300 meters) above sea level and
1% for each 10 °F (5.6 °C) above 77 °F (25 °C). The engine will operate satisfactorily
at an angle up to 30°. Refer to the equipment Operator's Manual for safe allowable
operating limits on slopes.
Service Parts
Purchase Briggs & Stratton service parts at
shop.briggsandstratton.com/parts or find an Authorized Service
Dealer at BRIGGSandSTRATTON.COM. You will need your
identification number (model - type - trim). Refer to the Features and
Controls section to find your engine identification number.
24.898 ci (408 cc)
3.465 in (88 mm)
2.638 in (67 mm)
28-32 oz (,82 - ,95 L)
.030 in (,76 mm)
170 lb-in (19,2 Nm)
.010 - .015 in (,254 - ,381 mm)
.004 - .006 in (,10 - ,15 mm)
.006 - .008 in (,15 - ,20 mm)
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