Briggs & Stratton 272147 User Manual

®
®
BRIGGS & STRATTON CORPORATION
Milwaukee, WI 53201
Part No. 275429-1/04 Printed in U.S.A.
www.briggsandstratton.com
272147 - Single Cylinder OHV Air-Cooled Engines
272144 - Vanguard™ Twin Cylinder OHV Air-Cooled Engines
275429 - Vanguard™ Twin Cylinder OHV Liquid-Cooled Engines
MS-0750 - Vanguard™ 3-Cylinder OHV Liquid-Cooled Gasoline Engines
MS-1055 - Vanguard™ 3-Cylinder OHV Liquid-Cooled Diesel Engines
Quality Starts With A
Master Service Technician
Other Briggs & Stratton
Commercial Power Repair Manuals:
Vanguard Twin Cylinder
OHV Liquid-Cooled Engines
Briggs & Stratton
VANGUARD™ TWIN CYLINDER OHV LIQUID-COOLED ENGINES
Part No. 275429-1/04
REPAIR MANUAL
™
275429_2LC_.1875_Spine 3/29/06 11:11 AM Page 1
For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com

Briggs & Stratton 272147 Specifications

General

Fuel Type	Gasoline
Starting System	Recoil
Spark Plug	Champion
Oil Type	SAE 30
Engine Type	4-Cycle, OHV, Single Cylinder

Summary

Safety Information

In the Interest of Safety

Fire and Explosion Hazards

Hazards related to gasoline flammability and explosiveness.

Unintentional Sparking and Start-up Hazards

Risks of fire, shock, entanglement, and lacerations from unintended ignition or operation.

Carbon Monoxide Hazard

Danger of poisonous gas from engine exhaust leading to nausea, fainting, or death.

Rotating Parts Hazards

Risks of entanglement and severe lacerations from rotating engine parts.

Equipment Attachment Hazards

Risks of broken bones, fractures, bruises, or sprains from improper equipment attachment.

Pressurized Cooling System Hazard

Danger of scalding from hot coolant or steam when removing radiator cap.

General Information

Fuel and Oil Recommendations

Changing Oil and Oil Filter

Step-by-step instructions for draining oil, replacing the filter, and refilling oil.

Change Coolant

Troubleshooting

Engine Will Not Start

Initial troubleshooting steps for an engine that will not start.

Engine Will Not Turn Over

Checks for engine cranking issues like safety interlocks and battery connections.

Check Starter

Tests the starter motor and solenoid functionality using a jumper wire.

Starter Current Draw Test

Procedure to test starter motor current draw using a multimeter and shunt.

No Load Starter Current Draw Test

Procedure to test starter motor current draw without load.

Hard Starting

Common causes and checks for engines that are difficult to start.

Systematic Check for Starting Issues

Check Ignition

Tests ignition system function during cranking and running.

Troubleshooting Ground Wire Harness

Check Carburetion

Diagnostic steps for engine carburetion based on spark plug condition.

Fuel Shut-Off Solenoid Test

Explains the function of the fuel shut-off solenoid and how to test it.

Cylinder Balance Test

Compares cylinder performance by measuring RPM loss.

Cylinder Leakdown Test

Procedure for testing cylinder sealing capability using compressed air.

Checking Cooling System

Testing Radiator Cap

Checking Thermostat

Check Oil Pressure Switch

Check Oil Pressure

Procedures for checking engine oil pressure using a gauge.

Charging System Troubleshooting

Battery Information and Checks

Engine Overhaul

Cylinder Inspection and Resizing

Inspects cylinder bores for wear and procedures for resizing.

Inspect Bearings

Crankshaft and Camshaft Inspection

Piston, Rings, and Connecting Rod Inspection

Disassemble Piston and Connecting Rod

Check Piston and Rings

Piston Pin and Connecting Rod Checks

Cylinder Head Inspection and Repair

Inspects and repairs cylinder heads, including valve guides and seats.

Valve Guide Procedures

Reface Valves and Seats

Assemble Cylinder Head

Oil Pump Procedures

Replacing Water Pump Seal

Starter Component Overhaul

Assemble Starter

Engine Assembly

Crankshaft and Piston Assembly

Installs crankshaft, connects piston to rod, and assembles rings.

Camshaft and Governor Gear Installation

Flywheel, Cylinder Heads, and Rocker Arms Installation

Installs flywheel, cylinder heads, and rocker arms.

Valve Clearance Adjustment

Armatures and Fan Assembly Installation

Intake Manifold and Carburetor Assembly

Air Cleaner Assembly Installation

Final Adjustments and Specifications

Governor System Overview

Speed Control Wire Adjustment

Carburetor Adjustment

Procedures for initial and final carburetor fuel mixture adjustments.

Choke Control Adjustment

Final Tuning Adjustments

Final adjustments for idle speed, governed idle, and top no-load speed.