Manual

Service, Storage & Specifications
For service
See an Authorized Briggs & Stratton Service Dealer. Each
one carries a stock of Genuine Briggs & Stratton Parts and is
equipped with special service tools. Trained mechanics
assure expert repair service on all Briggs& Stratton engines.
Only dealers advertising as "Authorized Briggs & Stratton"
are required to meet Briggs & Stratton standards.
You may locate your nearest Authorized Briggs &
Stratton Service Dealer in the "Yellow Pages TM"
directory under "Engines, Gasoline" or "Gasoline
" Engines," or "Lawn Mowers" or similar category.
There are over 30,000 Authorized Service
Dealers worldwide available to serve you.
Note: Walking fingers logo and "Yellow Pages" are registered
trademarks in various judsdi_ons.
The illustrated shop manual shown here
includes "Theories of Operation,"
common specifications and detailed
information covering adjustment, tune-up
and repair of Briggs & Stratton single
cylinder, L-head, 4 cycle engines. It is
available from an Authorized Briggs &
Stratton Service Dealer or you can order
it from the factory. Write:
Briggs & Stratton Corporation
Attn: Service Division
P. O. Box 1144
Milwaukee, Wl 53201
Service
R=_,I.i.s___,,j_
Pad No. 270962
Storage instructions
Engines stored over 30 days need to be protected or drained
of fuel to prevent gum from forming in fuel system or on
essential carburetor parts.
1. For engine protection, we recommend use of
Briggs& Stratton Gasoline Additive, Part No.
5041, available from an Authorized Briggs &
Stratton Service Dealer. Mix Additive with
fuel in fuel tank or storage container. Run
engine for a short time to circulate Additive
through carburetor. Engine and fuel can be
P/N 5041 stored up to 24 months.
Your Service Dealer has single-use
pouches of Gasoline Additive available.
Note: If engine is operating on oxygenated or reformulated
gasoline (gasoline blended with an alcohol or an ether),
remove all fuel from tank and run engine until it stops from
lack of fuel. If engine is stored with gasoline in fuel tank, we
recommend the use of Gasoline additive, Part No. 5041.
2. While engine is still warm, drain oil from crankcase
(see page 6). Refill with fresh oil of recommended grade
(see chart page 3).
3. Remove spark plug and pour about 1 oz (30 ml) of engine
oil into cylinder. Replace spark plug and crank slowly to
distribute oil.
4. Clean dirt and chafffrom cylinder, cylinder head fins, blower
housing, rotating screen and muffler area (see page 7).
5. Store in a clean and dry area, but NOT near a stove,
furnace or water heater which uses a pilot light or any
device that can create a spark.
General information
This isa single cylinder, L-head, air-cooled engine.
On mobile equipment, this engine will operate satisfactorilyat
any angle at which operator and equipmentcan function safely.
Model Series 194700, 195700, 196700, 197700
Bore ................................. 3 in. (76.20 mm)
Stroke ........................... 2-3/4 in. (69.85 mm)
Displacement ................... 19.44 cu. in. (318.5 cc)
Torque (Max.) .................. 12.7 ft. Ibs. @ 2500 rpm
Model Series 28B700, 28D700, 28M700, 28R700, 28"1"700,
28V700, 283700, 284700, 286700, 288700, 289700
Bore ............................ 3-7/16 in. (87.31 mm)
Stroke .......................... 3-1/16 in. (77.78 mm)
Displacement ................... 28.42 cu. in. (465.7 cc)
Torque (Max.) .................. 22.9 ft. Ibs. @ 2700 rpm
Note: For practical operation, the horsepower loading should
not exceed 85% of rated horsepower. Engine power will
decrease 3-1/2% for each 1,000 feet (300 meters) above sea
level and 1% for each 10° F (5.6 ° C) above 77° F (25 ° C).
Tune-up specifications
Armature air gap is .010-.014 in. (.25-.36 mm)
Spark plug gap is .030 in. (.76 ram)
Valve clearance is:
Model Series 194700, 195700, 196700
intake*. ...................... 005-.007 in. (.13-. 18 mm)
Exhaust* ..................... 007-.009 in. (.18-.23 mm)
Model Series 28B700, 28D700, 28M700, 28R700, 28"1-700,
283700, 284700, 286700, 288700, 289700
Intake*. ...................... 005-.007 in. (. 13-. 18 mm)
Exhaust* . .................... 009-.011 in. (.23-.28 ram)
* with valve springs installed and piston 1/4 in. (6mm) past
top dead center.
In the USA and Canada, a 24 hour hot line,1-800-233-3723, has a menu of pre-recordedmessages offenngyou engine maintenance information.
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