General Information; Tune-Up Specifications - Briggs & Stratton 400000 Series Operating & Maintenance Instructions

ENGINE INFORMATION
1
2
3
4
5
1. Rotating screen
2. Oilfill/Dipstick
3. 12V electric starter
4. Fuel filter (if equipped)
5. Oil drain plug
6. Spark plug wire
7. Fuel pump
8. Air cleaner

GENERAL INFORMATION

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 en-
gines 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 addition-
al warranties with respect to the performance or operational life of
this engine. This engine is warranted solely according to the prod-
uct and emissions warranties stated elsewhere in this manual.

TUNE-UP SPECIFICATIONS

Armature air gap . . . 0.008 – 0.012 in. (0.20 – 0.30 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 273521.
Intake . . . . . . . . . . . . . 0.004 – 0.006 in. (0.10 – 0.15 mm)
Exhaust . . . . . . . . . . . 0.004 – 0.006 in. (0.10 – 0.15 mm)
8
7
10
6
9. Intake manifold
10. Choke control bracket
11. Carburetor
12. Throttle control bracket
13. Engine
14. Oil filter
MODEL SERIES 400000
Bore
Stroke
Displacement
MODEL SERIES 440000
Bore
Stroke
Displacement
Note: For practical operation, the horsepower loading should
0.030 in. (0.76 mm)
6
9
11
12
13
Model Type
xxxxxx xxxx xx
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
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°.
6
14
Code
xxxxxxxx
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)