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Inspect Muffler And Spark Arrester - Figure
8
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.
• It is a violation of California Public Resource Code, Section 4442, to use or
operate the engine onany 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. Contact the original equipment
manufacturer, retailer, or dealer to obtain a spark arrester designed for the
exhaust system installed on this engine.
Inspect the muffler (A, Figure 8) for cracks, corrosion, or other damage. Remove the
muffler deflector (B), if equipped, and inspect for damage or carbon blockage. If
replacement parts are required, make sure to use only original equipment replacement
parts.
WARNING: Replacement parts must be the same and installed in the
same position as the original parts or fire could result.
Air Filter
This engine is not equipped with an air filter. DO NOT use this engine for anything
other than snow removal.
How To Change The Oil - Figure
2 3 9
Used oil is a hazardous waste product and must be disposed of properly. Do not discard
with household waste. Check with your local authorities, service center, or dealer for safe
disposal/ recycling facilities.
Remove Oil
1. With engine off but still warm, disconnect the spark plug wire (A, Figure 9) and keep
it away from the spark plug.
2. Remove the oil drain plug (E, Figure 2). Drain the oil into an approved receptacle.
Note: Any of the oil drain plugs (F) shown may be installed in the engine.
3. After the oil has drained, install and tighten the oil drain plug.
Add oil
• Place engine level.
• Clean the oil fill area of any debris.
• See the Specifications section for oil capacity.
Models with oil fill cap
1. Remove the oil fill cap (A, Figure 2).
2. Pour the oil slowly into the engine oil fill (B). Fill to point of overflowing.
3. Replace and tighten the oil fill cap.
Models with extended dipstick
1. Remove the dipstick (C, Figure 3) and wipe with a clean cloth.
2. Pour the oil slowly into the engine oil fill (B). Do not overfill. After adding oil, wait
one minute and then recheck the oil level.
3. Install and tighten the dipstick.
4. Remove the dipstick andcheck the oil level. It should be at the top of the full indicator
(D) on the dipstick.
5. Install and tighten the dipstick.
Storage
WARNING
Gasoline and its vapors are extremely flammable and explosive.
Fire or explosion can cause severe burns or death.
When Storing Gasoline Or Equipment With Fuel In Tank
• Store away f rom furnaces, stoves, water heaters or other appliances that have
pilot lights or other ignition sources because they can ignite gasoline 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 FRESH START
®
fuel stabilizer, available as a liquid additive or 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 for2 minutes to circulate the stabilizer throughout the fuel
system. The engine and fuel can then be stored up to 24 months.
If gasoline in the engine has notbeen 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 BRI GGSandSTRATTON.COM or call 1-800-233-3723.
Specifications
Engine Specifications
Model 90000
Displacement 9.02 ci (148 cc)
Bore 2.562 in (65.08 mm)
Stroke 1.750 in (44.45 mm)
Oil Capacity 18 -- 20 oz (0.54 -- 0.59 L)
Tune-up Specifications *
Model 90000
Spark Plug Gap 0.030 in (0.76 mm)
Spark Plug Torque 180 lb-in (20 Nm)
Armature Air Gap 0.006 - 0.010 in (0.15 - 0.25 mm)
Intake Valve Clearance 0.005 - 0.007 in (0.13 - 0.18 mm)
Exhaust Valve Clearance 0.007 - 0.009 in (0.18 - 0.23 mm)
* Engine power will decrease 3.5% for each 1,000 feet (300 meters) above sea leveland
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
Fuel Additive 5041, 5058
Resistor Spark Plug 802592
Long Life Platinum Spark Plug 5062
Spark Plug Wrench 89838, 5023
Spark Tester 19368
n We recommend that you see any Briggs & Stratton Authorized Dealer for all
maintenance and service of the engine and engine parts. Use only genuine Briggs &
Stratton parts.
Not for Reproduction