Briggs & Stratton 252700 User Manual

Briggs & Stratton
OPERATING AND MAINTENANCE
INSTRUCTIONS
MODELS
220700 to 220799
252700 to 252799
IN THE INTEREST OF SAFETY
DO NOT RUN ENGINE AT EXCESSIVE SPEEDS. Operating an engine at excessive speeds increases the hazard of personal iniurv
DO NOT TAMPER WITH PARTS WHICH MAY INCREASE THE GOVERNED SPEED.
For rotary lawnmower safety, A.N.S.I. Standard Safety Specifications for Power Lawn Mowers specify a maximum blade tip speed of
19.000 feet per minute (96.5 meters per second), primarily to reduce the hazard from thrown objects.
Rotary lawnmower manufacturers select the governed top speed of the engine based on the length and design of the cutter blade and
design of other mower parts.
All rotary lawnmowers should be checked for conformance to the A.N.S.I. Standard Safely Specifications for Power Lawn Mowers on
blad^ tip speed, if the engine is repaired or replaced, or if mower parts arc changed.
DANGER; GASOLINE VAPOR IS HIGHLY FLAMMABLE. Refuel outdoors preferably, or only in well ventilated areas.
DO NOT STORE, SPILL OR USE GASOLINE NEAR AN OPEN FLAME or devices such as a stove, furnace, water heater which utilize a
pilot light, or devices that can create a spark.
If gasoline is accidentally spilled, move machine away from area of spill and avoid creating any source of ignition until oasoHne vaoors
have dissipated. ® ^
DO NOT REFUEL GASOLINE TANK WHILE ENGINE IS RUNNING.
DO NOT RUN THE ENGINE IN AN ENCLOSED AREA. Exhaust gases contain carbon monoxide, an odorless and deadly p'oison.
TO PREVENT ACCIDENTAL STARTING always remove the spark plug from the engine, before working on the engine or eguioment
driven by the engine.
Except for adjustment; DO NOT operate engine if air cleaner or coverdlrectly over carburetor alrintake is removed. Removal of such part
could create a fire hazard.
DO NOT OPERATE WITHOUT A MUFFLER OR TAMPER WITH THE EXHAUST SYSTEM. Damaged mufflers or spark arresters could
create a fire hazard. Inspect periodically and replace if necessary.
DO NOT STRIKE FLYWHEEL with a hard object or metal tool as this may cause flywheel to shatter In operation, causing personal Injury
Center*^'^^ damage. Use Briggs & Stratton approved tools only, and if in doubt, contact your Authorized Briggs & Stratton Service
ALWAYS KEEP HANDS AND FEET CLEAR OF ROTATING PARTS.
IN THE INTEREST OF ENVIRONMENT
Increased exhaust noise level. Therefore, examine the muffler periodically
to be sure It is functioning effectively. To purchase a new muffler, see SERVICE AND REPAIR INFORMATION. ^ ^
W . ^NING; If this engine Is not equipped with a spark arrester and Is to be used on any forest covered, brush covered, or grass covered
iorTinn f ^6 maintained In effktive
^ operator, n he State of California the above is required by law (Section 4442 of the California Public Resources
Mr elL? " ® ®® apply on federal lands. See your Authorized Briggs & Stratton Service Center
lor sparK arrestsr murllar options.
SERVICE & REPAIR INFORMATION
If service or repair Is needed, contact an Authorized Briggs &
Stratton Service Center. Toserve you promptly and efficiently, the
Service Center will need the model, type and code number on
your engine.
Each Authorized Service Center carries a stock of original
Briggs & Stratton repair parts and is equipped with special service
tools. Trained mechanics assure expert repair service on all
Briggs & Stratton engines.
Major engine repairs should not be attempted unless you have
the proper tools and a thorough knowledge of internal com¬
bustion engine repair procedure.
Your nearest service center is listed in the "Yellow
Pages” under "Engines, Gasoline” or "Gasoline
Engines." He is one of over 26,000 authorized
dealers available to serve you.
This illustrated book includes
“Theories of Operation,” common
specifications, and detailed infor¬
mation covering the adjustment, tune-
up and repair procedures for 2 through
16 H.P. single cylinder models. It Is
available from any Authorized Briggs &
Stratton Service Center. Order as Part
Number 270962.
VcAbw pages
FORM NO. 270862-4/80
PRINTED IN U.S.A.
fBRIGGS& STRATTON^
BRIGGS & STRATTON CORP.
Milwaukee, Wisconsin 53201

Briggs & Stratton 252700 Specifications

General

Fuel Type	Gasoline
Starting System	Recoil
Spark Plug	Champion RC12YC
Governor Type	Mechanical
Oil Type	SAE 30
Engine Type	4-Stroke, OHV (Overhead Valve)
Ignition System	Magnetron electronic ignition
Starter Type	Recoil
Cooling Type	Air-cooled
Cylinder	Single
Stroke	4

Summary

Safety Precautions

General Safety Warnings

Essential safety warnings to prevent injury and damage during operation, including speed limits and handling fuel.

Muffler Maintenance

Ensure mufflers function effectively to manage exhaust noise and prevent leaks.

Spark Arrester Requirements

Use and maintain spark arresters on mufflers for fire prevention, especially in specific areas.

Service and Repair Information

Finding Authorized Service

Locate and utilize authorized service centers for repairs, parts, and expert service.

Before Starting Procedures

Oil Recommendations and Viscosity

Use recommended detergent oil and select appropriate SAE viscosity grades based on temperature.

Filling Engine Oil

Proper procedure for filling the engine oil sump to the correct level without overfilling.

Battery Charging

Charge the battery before use on engines equipped with electric starter motors.

Starting and Stopping

Fueling and Valve Operation

Fill fuel tank with clean gasoline and open the fuel shut-off valve before starting.

Engine Choking Procedures

Details manual, remote, and choke-a-matic control operation for starting.

Governor Speed Control

Set governor speed control lever to the 'RUN' or 'FAST' position for starting.

Cold Weather Starting

Provides specific tips for starting the engine in cold temperatures.

Stopping the Engine

Turn the governor speed control lever to 'STOP' or the key to 'OFF' to shut down the engine.

Maintenance and Servicing

Oil Level Checks and Changes

Regularly check and change engine oil according to specified intervals for proper lubrication.

Air Cleaner Servicing

Instructions for cleaning and maintaining foam and cartridge air cleaners.

Adjustments and Cleaning

Carburetor Adjustment Procedures

Guides for minor carburetor adjustments to compensate for fuel, temperature, altitude, or load.

Cooling System Cleaning

Clean cooling system by removing blower housing to prevent overheating and engine damage.

Spark Plug Maintenance

Instructions for cleaning and resetting the spark plug gap.

Combustion Deposit Removal

Procedure for removing combustion deposits from the cylinder and head.

Spark Arrester Cleaning

Remove and clean the spark arrester screen assembly every 50 hours.

Choke and Control Adjustments

Ensuring proper choke and stop switch operation through remote control adjustments.

Engine Specifications and Diagrams

Tune-Up Specifications

Key specifications for spark plugs, ignition points, and valve clearances.

Governor Speed Control Adjustments

Details on adjusting governor speed for acceptable operating and idle RPM ranges.

Typical Wiring Diagrams

Illustrations of common wiring configurations for starter and lighting circuits.

General Engine Information

Basic details on engine type, bore, stroke, displacement, horsepower, and torque ratings.

Storage Instructions

Steps for preparing the engine for storage, including fuel draining and oil treatment.