Engine Parts; Tune-Up Specifications - Briggs & Stratton 406700 Series Operating & Maintenance Manual

ENGINE PARTS

5
4
3
1. Spark plug wire
2. Oil drain plug
3. 12V electric starter
4. Oil fill/Dipstick
5. Rotating screen
6. Air cleaner
7. Fuel pump
GENERAL INFORMATION
ENGINE MODEL
This is a twin cylinder, overhead valve (OHV), air-cooled
engine. It is a low emissions engine.
In the state of California, Model Series 400000 and 440000
engines are certified by the California Air Resources Board
to meet emissions standards for 250 hours. Such certifica-
tion 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.
MODEL SERIES 400000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . . . . . . .
MODEL SERIES 440000
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 .
2 1
2.97 in. (75.44 mm)
2.89 in. (73.4 mm)
40.0 cu. in. (656 cc)
3.12 in. (79.25 mm)
2.89 in. (73.4 mm)
44.2 cu. in. (725 cc)
6
12
11
7
8. Blower housing
9. Oil filter
10. Emission label
11. Intake manifold
12. Carburetor
13. Engine
THE INTERNATIONAL SYMBOLS USED
IN THIS MANUAL INCLUDE:
Safety Alert
On Off
Fuel Shutoff

TUNE-UP SPECIFICATIONS

Armature air gap
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 273521.
Intake . . . . . . . . . . . . .
Exhaust . . . . . . . . . . .
6
13
10
Model Type
xxxxxx xxxx xx
ON THE ENGINE OR
Read Owner's
Manual
Oil Stop
Choke Fuel
. . . 0.008 – 0.012 in. (0.20 – 0.30 mm)
. . . . . . . . . . . . . . . . . . 0.030 in. (0.76 mm)
0.004 – 0.006 in. (0.10 – 0.15 mm)
0.004 – 0.006 in. (0.10 – 0.15 mm)
8
9
Code
xxxxxxxx