Briggs & Stratton 287700 Series Operator Owner's Manual page 9

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.
When you purchase equipment powered by a
Briggs & Stratton engine, you are assured of
highly skilled, reliable service at more than
30,000 Authorized Service Dealers worldwide,
including more than 2,700 Master Service
Technicians. Look for these signs wherever
Briggs & Stratton service is offered.
You may locate your nearest Authorized Briggs &
Stratton Service Dealer in the "Yellow Pages "
directory under "Engines, Gasoline" or "Gasoline
Engines," or "Lawn Mowers" or similar category.
Or log on to our dealer locator map on our web site
www.briggsandstratton.com
Note: Walking fingers logo and "Yellow Pages" are registered
trademarks in various jurisdictions.
The illustrated shop manual shown here
includes "Theories of Operation," com-
mon specifications and detailed informa-
tion covering adjustment, tune-up and
repair of Briggs & Stratton single cylinder,
overhead valve, 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, WI 53201
General information
This is a single cylinder, over-head valve (OHV), air-cooled
engine.
On mobile equipment, this engine will operate satisfactorily at
any angle at which operator and equipment can function safely.
Model Series 28E700, 28N700, 287700, 28P700, 28Q700,
28S700, 28U700
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . . . . .
Torque (Max.) . . . . . . . . . . . . . . . . . .
Model Series 310700, 311700, 312700, 313700
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . . . . .
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).
In the USA and Canada, a 24 hour hot line, 1-800-233-3723, has a menu of pre-recorded messages offering you engine maintenance information.
Part No. 272147
3-7/16 in. (87.31 mm)
3-1/16 in. (77.78 mm)
28.42cu. in. (465.7 cc)
22.9 ft. lbs. @ 2700 rpm
3-9/16 in. (90.60 mm)
3-1/16 in. (77.78 mm)
30.59 cu. in. (501.2 cc)
9
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 chaff from 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.
Tune-up specifications
Armature air gap is .010-.014 in. (.25-.36 mm)
Spark plug gap is .030 in. (.76 mm)
Valve clearance is:
Intake* . . . . . . . . . . . . . . . . . . . . . .
Exhaust* . . . . . . . . . . . . . . . . . . . .
* with valve springs installed and piston 1/4 in. (6mm) past
top dead center.
.003-.005 in. (.08-.13 mm)
.005-.007 in. (.13-.18 mm)