Engine Components; Technical Information; Safety Specifications; General Information - Briggs & Stratton 90000 Operating & Maintenance Instructions

Note: (This note applies only to engines used in the U.S.A.) Maintenance, replacement or repair of the emission control devices and systems may be performed
by any non‐road engine repair establishment or individual. However, to obtain no charge repairs under the terms and provisions of the Briggs & Stratton
warranty statement, any service or emission control part repair or replacement must be performed by a factory authorized dealer.

ENGINE COMPONENTS

Fig. 1
1
Rope Handle for Rewind Starter
2
Oil drain plug
3
Choke control lever
4
Throttle lever
5
Air cleaner
6
Fuel tank cap
7
Spark plug / Spark plug wire
8
Muffler
9 Engine
Model Type
xxxxxx xxxx xx xxxxxxxx
10
Stop switch wire, if equipped
11
Oil fill cap
12
Fuel tank cap
13
Air Cleaner
14
Stop switch, if equipped
Record your engine Model, Type and Code numbers here for
future use.
Record your date of purchase here for future use.

GENERAL INFORMATION

This is a single cylinder, L‐head, air‐cooled engine. It is a low
emissions engine.
Model 90000
Bore . . . . . . . . . . . . . . . . . . . . . . . . . 65.09 mm (2.56 in.)
Stroke . . . . . . . . . . . . . . . . . . . . . . . 44.45 mm (1.75 in.)
Displacement . . . . . . . . . . . . . . . . . . 148 cc (9.02 cu. in.)
TUNE‐UP SPECIFICATIONS
Armature air gap . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug gap . . . . . . . . . . . . . . . . .
Valve clearance with valve springs installed and piston 6 mm
past top dead center (check when engine is cold). See Repair
Manual P/N 270962.
Intake valve clearance . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust valve clearance . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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). It will operate
satisfactorily at an angle up to 15_. Refer to the equip‐
ment operator manual for safe allowable operating
limits on slopes.
GB

TECHNICAL INFORMATION

Engine Power Rating Information
The gross power rating for individual gas engine mod‐
els is labeled in accordance with SAE (Society of Auto‐
motive Engineers) code J1940 (Small Engine Power &
Torque Rating Procedure), and rating performance has
been obtained and corrected in accordance with SAE
J1995 (Revision 2002‐05). Torque values are derived
at 3060 RPM; horsepower values are derived at 3600
RPM. Actual gross engine power will be lower and is
affected by, among other things, ambient operating
conditions and engine‐to‐engine variability. Given both
the wide array of products on which engines are placed
and the variety of environmental issues applicable to
operating the equipment, the gas engine will not devel‐
Code
op the rated gross power when used in a given piece of
power equipment (actual "on‐site" or net power). This
difference is due to a variety of factors including, but not
limited to, accessories (air cleaner, exhaust, charging,
cooling, carburetor, fuel pump, etc.), application limita‐
tions, ambient operating conditions (temperature, hu‐
midity, altitude), and engine‐to‐engine variability. Due
to manufacturing and capacity limitations, Briggs &
Stratton may substitute an engine of higher rated pow‐
er for this Series engine.

SAFETY SPECIFICATIONS

• Read entire Operating & Maintenance Instructions
AND the instructions for the equipment this engine
powers.*
• Failure to follow instructions could result in serious
injury or death.
* Briggs & Stratton does not necessarily know what equip‐
ment this engine will power. For that reason, you should
carefully read and understand the operating instructions for
the equipment on which your engine is placed.
0.15 - 0.25 mm
(0.006 - 0.010 in.)
0.76 mm (.030 in.)
THE OPERATING &
MAINTENANCE INSTRUCTIONS
0.13 - 0.18 mm
CONTAIN SAFETY
(0.005 - 0.007 in.)
INFORMATION TO:
0.18 - 0.23 mm
• Make you aware of hazards associated with
(0.007 - 0.009 in.)
engines
• Inform you of the risk of injury associated with
those hazards, and
• Tell you how to avoid or reduce the risk of injury.
BEFORE OPERATING
ENGINE
1
A signal word (DANGER, WARNING, or CAUTION) is used
with the alert symbol to indicate the likelihood and the potential
severity of injury. In addition, a hazard symbol may be used to
represent the type of hazard.
DANGER indicates a hazard which, if not avoided,
will result in death or serious injury.
WARNING indicates a hazard which, if not avoided,
could result in death or serious injury.
CAUTION indicates a hazard which, if not avoided,
might result in minor or moderate injury.
,
CAUTION when used without the alert symbol,
indicates a situation that could result in damage to
the engine.
WARNING
The engine exhaust from this product contains chemicals
known to the State of California to cause cancer, birth de‐
fects, or other reproductive harm.
Hazard Symbols and Meanings
Explosion
Fire
Kickback Toxic Fumes
Moving Parts
International Symbols and Meanings
Safety Alert Choke Read Operator's
Oil Fuel Fuel Shutoff
On Off
Stop
GB
Shock
Hot Surface
Manual