9
en
8. Install air filter cover and secure with fasteners.
How To Replace The Fuel Filter - Figure
12
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 c racks 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 12), 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 with an original equipment replacement filter.
5. Secure the fuel lines with the clamps as shown.
How To Clean The Air Cooling System - Figure
13
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.
WARNING
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.
Use a brush or dry cloth to remove debris from the finger guard/rotating screen (A).
Keep linkage, springs and controls (B) clean. Keep the area around and behind the
muffler (C) free of any combustible debris (Figure 13).
Storage
WARNING
Fuel and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Storing Fuel Or Equipment With Fuel In Tank
Store away from furnaces, stoves, water heaters or other appliances that have
pilot lights or other ignition sources because they can ignite fuel vapors.
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 parts. To keep fuel fresh,
use Briggs & Stratton Advanced Formula Fuel Treatment & Stabilizer, available
wherever Briggs & Stratton genuine service parts are sold.
For engines equipped with a FRESH START
®
fuel cap, use Briggs & Stratton FRESH
START
®
available in a drip concentrate cartridge.
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
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.
Troubleshooting
Need Assistance? Go to BRIGGSandSTRATTON.COM or call 1-800-233-3723 in USA.
Specifications
Engine Specifications
Model 310000
Displacement 30.52 ci (500 cc)
Bore 3.563 in (90.49 mm)
Stroke 3.062 in (77.77 mm)
Oil Capacity 46 -- 48 oz (1.36 -- 1.40 L)
Engine Specifications
Model 330000
Displacement 32.93 ci (540 cc)
Bore 3.701 in (93.99 mm)
Stroke 3.062 in (77.77 mm)
Oil Capacity 46 -- 48 oz (1.36 -- 1.40 L)
Tune-up Specifications *
Model 310000
Spark Plug Gap 0.030 in (0.76 mm)
Spark Plug Torque 180 lb-in (20 Nm)
Armature Air Gap 0.010 - 0.014 in (0.25 - 0.36 mm)
Intake Valve Clearance 0.003 - 0.005 in (0.08 - 0.13 mm)
Exhaust Valve Clearance 0.005 - 0.007 in (0.13 - 0.18 mm)
Tune-up Specifications *
Model 330000
Spark Plug Gap 0.030 in (0.76 mm)
Spark Plug Torque 180 lb-in (20 Nm)
Armature Air Gap 0.010 - 0.014 in (0.25 - 0.36 mm)
Intake Valve Clearance 0.003 - 0.005 in (0.08 - 0.13 mm)
Exhaust Valve Clearance 0.005 - 0.007 in (0.13 - 0.18 mm)
* 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.
Common Service Parts n
Service Part Part Number
Air Filter, Oval 793569
Air Filter Pre-cleaner, Oval 793685
Oil -- SAE 30 100028
Oil Filter, Standard -- Black 492932
Oil Filter, High Efficiency -- Yellow 795890
Oil Filter, High Efficiency -- Orange 798576
Fuel Filter 394358S
Service Part Part Number
Fuel Additive 5041, 5058
Resistor Spark Plug 491055
Long Life Platinum Spark Plug 5066
Spark Plug Wrench 89838, 5023
Spark Tester 19368
n We recommend that you see any Briggs & Stratton Authorized Deal er for all maintenance and service of the engine and engine parts.
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