Engine Parts; Tune.u P Spec Ifi Cati Ons - Briggs & Stratton 28N700 Operating And Maintenance Instruction Manual

ENGINE PARTS
O i l d r a i n
Oil fill/Dipstick
Rotating screen
Blower housing
1 .
2 .
3 .
4 .
5 .
6 .
Muffler/(Muffler
guard, if equipped)/
(Spark arrester, if equipped)
12 V electric starter
L
9 .
1 0 .
1 1 .
12.
Air cleaner
In-line fuel filter (if equipped)
Carburetor
Oil filter (if equipped)
Spark plug wire
Engine
Model
XXXXX
Type
XXXX XX
Code
X X X X X X X X
G E N E R A L I N F O R M A T I O N
E N G I N E M O D E L
This is a single cylinder, overhead valve (OHV), air-cooled
engine. lt is a low emissions engine.
In the state of California, OHV Model Series 280000 and
310000 engines are certified by the California Air Re-
sources Board to meet emissions standards for 250 hours.
Such certification does.not grant the purchaser, owner or
operator of this engine any additional warranties with
respect to the perlormance or operational life of this engine.
This engine is warranted solely according to the product
and emissions warranties stated elsewhere in this manual.
MODEL SERIES 28OOOO
B o r e .
. 3 - 7 / 1 6 i n . ( 8 7 . 3 1 m m )
Stroke
3-1/16 in. (77 .78 mm)
Disolacement . . . .
28.42 cu. in. (465.7 cc)
M O D E L S E R I E S 3 1 O O O O
Bore .
. 3-9/16 in. (90.60 mm)
Stroke
3-1116 in. (77 .78 mm)
D i s o l a c e m e n t . . . .
3 0 . 5 9 c u . i n . ( 5 0 1 . 2 c c )
Note: For practical operation, the horsepower loading should
not exceed 85% of rated horsepower. Engine power will de-
crease 3-1/2"/" for each 1,000 feet (300 meters) above sea
level and 1"ktor each 10'F (5.6'C) above 77" F (25" C).
Engine will operate satisfactorily at an angle up to 15'.
TUNE.U P SPEC IFI CATI ONS
A r m a t u r e a i r g a p . . . 0 . 0 1 0 - 0 . 0 1 4 i n . ( 0 . 2 5 - 0 . 3 6 m m )
S p a r k p l u g g a p
0 . 0 3 0 i n . ( 0 . 7 6 m m )
Valve clearance with valve springs installed and piston 1/4 in.
(6 mm) past top dead center (check when engine is cold).
See Repair Manual PlN272147 or 274008.
lntake
0.003 - 0.005 in. (0.08 - 0.'13 mm)
E x h a u s t
. . . . . 0 . 0 0 5 - 0 . 0 0 7 i n . ( 0 . 1 3 - 0 . 1 8 m m )
THE INTERNATIONAL
SYMBOLS USED
ON THE ENG INE O R
IN THIS MANUAL INCLUDE:
A
Safety Alert
[g
On Off
N]
Fuel Shutoff
Read Owner's
Manual
@
Stop
T
Fuel
v,
oil
lrl
Choke