How To Replace The Fuel Filter - Figure 7
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
Keep fuel away from sparks, open flames, pilot lights, heat, and other ignition
sources.
Check fuel lines, tank, cap, and fittings frequently for cracks or leaks.
Replace if necessary.
Before replacing the fuel filter, drain the fuel tank or close the fuel shut-off valve.
Replacement parts must be the same and installed in the same position as the
original parts.
If fuel spills, wait until it evaporates before starting engine.
1. Before replacing the fuel filter (A, Figure 7), if equipped, drain the fuel tank or close
the fuel shut-off valve. Otherwise, fuel can leak out and cause a fire or explosion.
2. Use pliers to squeeze tabs (B) on the clamps (C), then slide the clamps away from
the fuel filter. Twist and pull the fuel lines (D) off of the fuel filter.
3. Check the fuel lines for cracks or leaks. Replace if necessary.
4. Replace the fuel filter.
5. Secure the fuel lines with the clamps as shown.
How To Service The Air Filter - Figure 8
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
Never start or run 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 can
damage the filter and solvents will dissolve the filter.
1. Open the latches (A, Figure 8) and remove the cover (B).
2. Remove the air filter (C).
3. To loosen debris, gently tap the air filter on a hard surface. If the air filter is
excessively dirty, replace with a new air filter.
4. The cyclonic air filter system also has a safety filter (D, Figure 9) (if equipped). See
the Maintenance Chart for service requirements. To remove, carefully pull the safety
filter away from air cleaner body (E) and discard. Make sure that dirt or debris do not
enter the engine.
5. Install the new safety filter in the air cleaner body.
6. Install the air filter over the safety filter.
7. Install the cover and close the latches.
How To Clean The Air Cooling System - Figure 10
WARNING
Running engines produce heat. Engine parts, especially muffler,
become extremely hot.
Severe thermal burns can occur on contact.
Combustible debris, such as leaves, grass, brush, etc. can catch fire.
Allow muffler, engine cylinder and fins to cool before touching.
Remove accumulated debris from muffler area and cylinder area.
NOTICE: Do not use water to clean the engine. Water could contaminate the fuel
system. Use a brush or dry cloth to clean the engine.
This is an air cooled engine. Dirt or debris can restrict air flow and cause the engine to
overheat, resulting in poor performance and reduced engine life.
1. Use a brush or dry cloth to remove debris from the air intake area (A, Figure 10).
2. Keep linkage, springs and controls (B) clean.
3. Keep the area around and behind the muffler free of any combustible debris.
4. Make sure the oil cooler fins (C) are free of dirt and debris.
5. Loosen the fasteners (D) and remove the air intake grille (E, Figure 12). To access all
the fasteners, it may be necessary to remove fasteners (H) and air filter strap (J).
Pivot the air filter (K) to allow access to fastener.
6. Loosen the fasteners (F) and open the debris access panels (G). Remove any grass
and debris that has accumulated on the cylinders.
7. Close the debris access panels and secure with the fasteners.
8. Install air filter strap (J) and secure with fasteners (H).
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9. Install the air intake grille and secure with the fasteners.
After a period of time, debris can accumulate under the air intake grille and in the
cylinder cooling fins and cause the engine to overheat. This debris cannot be removed
without partial disassembly of the engine. Have a Briggs & Stratton Authorized Dealer
inspect and clean the air cooling system as recommended in the Maintenance Chart.
Storage
When Storing Fuel Or Equipment With Fuel In Tank
Fuel System
Fuel can become stale when stored over 30 days. Stale fuel causes acid and gum
deposits to form in the fuel system or on essential carburetor or fuel injection parts. To
keep fuel fresh, use Briggs & Stratton Advanced Formula Fuel Treatment &
Stabilizer, available wherever Briggs & Stratton genuine service parts are sold.
There is no need to drain gasoline from the engine if a fuel stabilizer is added according
to instructions. Run the engine for 2 minutes to circulate the stabilizer throughout the fuel
system before storage.
If gasoline in the engine has not been treated with a fuel stabilizer, it must be drained into
9
an approved container. Run the engine until it stops from lack of fuel. The use of a fuel
stabilizer in the storage container is recommended to maintain freshness.
Engine Oil
While the engine is still warm, change the engine oil. See the How To Change The Oil
section.
Troubleshooting
Need Assistance? Go to VanguardEngines.com or call 1-800-999-9333 (in USA).
Specifications
Engine Specifications
Model
Displacement
Bore
Stroke
Oil Capacity
Tune-up Specifications *
Model
Spark Plug Gap
Spark Plug Torque
12
Armature Air Gap -- Carburetor Models
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 15. Refer to the equipment operator's manual for safe allowable
operating limits on slopes.
Service Part
Air Filter, Cyclonic
Safety Filter, Cyclonic
Oil -- SAE 30
Oil Filter
Fuel Filter
Advanced Formula Fuel Treatment & Stabilizer
Resistor Spark Plug
Long Life Platinum Spark Plug
Spark Plug Wrench
Spark Tester
n We recommend that you see any Briggs & Stratton Authorized Dealer for all
maintenance and service of the engine and engine parts.
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
Store away from furnaces, stoves, water heaters or other appliances that have
pilot lights or other ignition sources because they can ignite fuel vapors.
Common Service Parts n
490000
49.42 ci (810 cc)
3.300 in (83.81 mm)
2.890 in (73.41 mm)
66 -- 68 oz (1.9 -- 2.0 L)
490000
0.030 in (0.76 mm)
180 lb-in (20 Nm)
0.008 - 0.012 in (0.20 - 0.30 mm)
0.004 - 0.006 in (0.10 - 0.15 mm)
0.004 - 0.006 in (0.10 - 0.15 mm)
Part Number
841497
821136
100028
492932
845125
100117, 100120
491055
5066
19374
19368
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