Briggs & Stratton Engine 277102 Operators Manual

11
Oil
Check oil level before starting the engine.
Keep oil level at FULL. Do not overfill.
Check level daily, or after every eight (8) hours.
Capacity
Engine oil capacity is 2/3 qt. (22 oz.; 0.65 liter). NOTE: Often residual oil remains in engine. Fill to FULL line on
dipstick.
Oil Recommendation
Use a high quality detergent oil classified “For Service SF, SG, SH, SJ” or higher.
Do not use special additives.
SAE 30 40F and higher (5C and higher)
is good for all purpose use above 40°F,  u s e  b e l o...

12
Changing Oil
Change oil after first 5 to 8 hours of use, then every 50
hours. Change oil every 25 hours when operating the
engine under heavy load or in high temperatures.
1. Run engine until it runs out of fuel. Otherwise,
fuel can leak out, creating a fire/explosion hazard,
when you tip engine in Step 4.
2. Disconnect spark plug wire and keep it away from
spark plug.
3. With engine OFF but still warm remove dipstick.
4. Drain oil into appropriate receptacle. 
Top oil drain: Keep air cleaner above...

13
Fuel
Type of gasoline to use
This engine is certified to operate on gasoline. The
emission control system for this engine is EM (Engine
Modifications).
Always use gasoline that meets these requirements:
•Clean, fresh unleaded gasoline.
•A minimum of 87 octane/87 AKI (91 RON). If
operating at high altitude, see below.
•Gasoline with up to 10% ethanol (gasohol) or up to
15% MTBE (methyl tertiary butyl ether), is
acceptable.
•Use of any gasoline other than those approved
above will void the engine...

14
Fresh Start Continuous Fuel Preserver - Fuel Cap
Your engine may be equipped with
a Fresh Start™ fuel cap.
Cartridge is shown with tab
partially removed.
Fresh Start fuel cap is designed to
hold a cartridge which contains fuel stabilizer.
1. Place silver foil seal end of cartridge into fuel cap.
2. Press to “snap” cartridge into place.
3. Remove the white tab to expose membrane.
4. Reinstall fuel cap on engine fuel tank.
5. Check periodically − if empty, remove and
replace.
DANGER
•IF SWALLOWED, call...

15
Maintenance
Regular maintenance will improve the performance and
extend the life of the engine. See any Authorized Briggs
& Stratton Dealer for service. Use only genuine
Briggs & Stratton parts. Other parts may notperform as well, may damage the engine, and mayresult in injury. In addition, use of other parts may void
your warranty.
Emission Control
Maintenance, replacement or repair of the emission
control devices and systems may be performed by
any nonroad engine repair establishment or
individual....

16
Air Cleaner
All engines have an air cleaner cartridge. The cartridge
is either flat or oval. In addition, some engines have a
pre-cleaner.
Do not use pressurized air or solvents to clean
cartridge. Pressurized air can damage cartridge;
solvents will dissolve cartridge.
CAUTION
Removing and Installing Flat Air Cleaner
Flat Air Cleaner
SCREWCOV-
ERBAS
E
CARTRIDGECARTRIDGE LIP
ASSEMBLE SO CARTRIDGE LIP TOUCHES
BASE IN DIRECTION SHOWN
PRE-CLEANER LIP
TABS AND SLOTS
PRE-CLEANER
P/N 493537
1. Loosen screw,...

17
Cleaning Debris
Daily or before every use, clean accumulated debris
from engine. Keep linkage, spring and controls clean.
Keep area behind muffler free of any combustible
debris.
On string trimmer applications, clean accumulated
debris at each refueling, sooner if needed.
Do not use water to clean engine parts. Water could
contaminate fuel system. Use a brush or dry cloth.
CAUTION
CLEANCLEAN
Finger Guard
CLEAN
CLEAN
Linkage, Springs,
Controls
CLEAN
Muffler
Fuel System
Replacing In-line Fuel Filter (if...

18
Storage
Equipment stored with fuel can become stale when
stored over 30 days. Stale fuel causes acid and gum
deposits to form in fuel system or on essential
carburetor parts. Mix fuel stabilizer with fuel in tank or
storage container. Run engine for a short time to
circulate stabilizer through carburetor and engine.
Engine and fuel can be stored up to 24 months.
If fuel stabilizer is not used, you need to drain
gasoline from equipment prior to storage.
If the FRESH START™ continuous fuel preserver...

19
Specifications
All the components used to build this engine
assembly must remain in place for the proper
operation of this engine.
CAUTION
We recommend that you use an authorized Briggs &
Stratton Service Dealer for all maintenance and service
of the engine and engine parts. Use only genuine
Briggs & Stratton parts.
General Information
This is a single cylinder, overhead valve (OHV),
air-cooled engine. It is a low emissions engine.
In the state of California, OHV Model 120000 engines
are certified by...

20
Emission Information
Engines that are certified to meet the California Air
Resources Board (CARB) Tier 2 Emission Standards
must display information regarding the Emissions
Durability Period and the Air Index. Briggs & Stratton
makes this information available to the consumer on
our emission labels. The engine emission label will
indicate certification information.
The Emissions Durability Period describes the
number of hours of actual running time for which the
engine is certified to be emissions...