Tune-Up Specifications; General Information - Briggs & Stratton 21000 Series Operating & Maintenance Instructions

ENGINE INFORMATION
1
2
3
1. Carburetor
2. Stop switch
3. Rope handle
4. Fuel fill
5. Air cleaner
6. Choke
7. Spark plug

GENERAL INFORMATION

ENGINE MODEL
This is a single cylinder, air-cooled engine. It is a low emissions en-
gine.
In the state of California, Model Series 21000 and 21100 engines
are certified by the California Air Resources Board to meet emis-
sions standards for 50 hours. Such certification does not grant the
purchaser, owner or operator of this engine any additional warran-
ties with respect to the performance or operational life of this en-
gine. This engine is warranted solely according to the product and
emissions warranties stated elsewhere in this manual.
MODEL SERIES 21000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . . . . .
MODEL SERIES 21100
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . . . . . .
Note: 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).
5
4
8. Fuel return hose
9. Fuel intake hose
10. Primer bulb
11. Engine Model Type Code
12. Oil fill / dipstick
1.575 in. (40 mm)
1.065 in. (27 mm)
2.074 cu. in. (34 cc)
1.575 in. (40 mm)
1.250 in. (31.75 mm)
2.44 cu. in. (40 cc)
6
6
xxxxxx xxxx xxxxxxxx

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.
Intake . . . . . . . . . . . . . 0.002 – 0.004 in. (0.05 – 0.10 mm)
Exhaust . . . . . . . . . . . 0.002 – 0.004 in. (0.05 – 0.10 mm)
7
8
9
10
11
12
0.025 in. (0.64 mm)