Engine Parts; Tune-Up Specifications - Briggs & Stratton 42A700 Operating & Maintenance Instructions

ENGINE PARTS

4
3
2
1. Spark plug wire
2. Carburetor
3. Air cleaner
4. Rotating screen
5. Emission label and Engine
Model Type
xxxxxx xxxx xx
GENERAL INFORMATION
ENGINE MODEL
This is a twin cylinder, overhead valve (OHV), air-cooled
engine. It is a low emissions engine.
MODEL SERIES 420000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . .
MODEL SERIES 460000
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). It will operate satisfactorily at an angle up to 15°.

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 271172.
Intake . . . . . . . . . . . . . 0.006 – 0.008 in. (0.15 – 0.20 mm)
Exhaust . . . . . . . . . . . 0.009 – 0.011 in. (0.23 – 0.28 mm)
5
1
Code label
xxxxxxxx
3-7/16 in. (87.31 mm)
2-9/32 in. (57.94 mm)
42.33 cu. in. (694.0 cc)
3-7/16 in. (87.31 mm)
2-15/32 in. (62.48 mm)
45.64 cu. in. (748.0 cc)
0.030 in. (0.76 mm)
6
11
10
9
8
6. Oil drain plug
7. Crankshaft
8. 12V electric starter
9. Fuel filter
10. Oil fill/Dipstick
11. Blower housing
THE INTERNATIONAL SYMBOLS USED
ON THE ENGINE OR
IN THIS MANUAL INCLUDE:
Safety Alert
Oil
On Off
Fuel Shutoff Choke
6
7
Read Owner's
Manual
Stop
Fuel