Briggs & Stratton 280000 Operating & Maintenance Instructions page 6

ENGINE INFORMATION
2
1
12
11
1. Oil drain
2. Oil fill/Dipstick
3. Rotating screen
4. Blower housing
5. Muffler/(Muffler guard, if equipped)/
(Spark arrester, if equipped)
6. 12 V electric starter
GENERAL INFORMATION
ENGINE MODEL
This is a single cylinder, overhead valve (OHV), air-cooled
engine. It is a low emissions engine.
In the state of California, OHV Model Series 210000,
280000 and 310000 engines are certified by the California
Air Resources 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 performance or operational life of this
engine. This engine is warranted solely according to the
product and emissions warranties stated elsewhere in this
manual.
TUNE-UP SPECIFICATIONS
Armature air gap . . . 0.010 – 0.014 in. (0.25 – 0.36 mm)
Spark plug gap . . . . . . . . . . . . . . . . . .
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 P/N 272147.
Intake . . . . . . . . . . . . . 0.003 – 0.005 in. (0.08 – 0.13 mm)
Exhaust . . . . . . . . . . . 0.005 – 0.007 in. (0.13 – 0.18 mm)
3
4
5
6
7
10
0.030 in. (0.76 mm)
3
2
1
12
8
9
11
7. Air cleaner
8. In-line fuel filter (if equipped)
9. Carburetor
10. Oil filter (if equipped)
11. Spark plug wire
12. Engine Model
xxxxx
MODEL SERIES 210000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . .
MODEL SERIES 280000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . .
MODEL SERIES 310000
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).
Engine will operate satisfactorily at an angle up to 15°.
6
4
5
6
7
8
9
10
Type Code
xxxx xx xxxxxxxx
3-7/16 in. (87.31 mm)
2-17/64 in. (77.78 mm)
21.00 cu. in. (344.1 cc)
3-7/16 in. (87.31 mm)
3-1/16 in. (77.78 mm)
28.42 cu. in. (465.7 cc)
3-9/16 in. (90.60 mm)
3-1/16 in. (77.78 mm)
30.59 cu. in. (501.2 cc)