Briggs & Stratton 275429 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
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Briggs & Stratton 275429 Specifications

General

Brand	Briggs & Stratton
Model	275429
Category	Engine
Language	English

Summary

Safety Information

Hazard Symbols and Meanings

Fire and Explosion Hazards

Electrical Hazards

Carbon Monoxide Hazard

Sparking Hazard

General Dangers

Rotating Parts Hazard

Impact Hazard

Pressurized Cooling System Warning

Advises caution when removing the radiator cap due to pressurized hot coolant.

SECTION 5 ENGINE ASSEMBLY

Install Crankshaft

Assemble Piston and Connecting Rod

Assemble Piston Rings to Piston

Section 1 - General Information

Maintenance Schedule

Outlines recommended daily, periodic, and yearly maintenance tasks for the engine.

Fuel and Oil Recommendations

Specifies the types of gasoline and lubricating oil suitable for the engine, including viscosity grades.

Changing Oil and Oil Filter

Provides step-by-step instructions for changing the engine oil and oil filter.

Replace Spark Plug

Engine Safety Precautions

Change Coolant

Details the procedure for draining, flushing, and refilling the engine's cooling system.

Air Cleaner Maintenance

SECTION 2 TROUBLESHOOTING

Will Not Start

Addresses issues where the engine fails to start, covering scenarios like not turning over or turning over slowly.

Engine Will Not Turn Over

Provides steps to diagnose why the engine starter motor is not engaging or turning the engine.

Check Starter

Describes tests to determine if the starter motor or its solenoid is functioning correctly.

Section 2 - Troubleshooting

Starter Current Draw Test

Explains how to perform a current draw test on the starter motor to check its condition.

No Load Starter Current Draw Test

Details the procedure for testing the starter motor's current draw without any load applied.

Check Ignition (With Engine Starter)

Describes how to test ignition spark using the starter motor and an ignition tester.

Check Carburetion

Guides on checking fuel supply, filters, and controls before diagnosing carburetion issues.

Cylinder Balance Test

Details how to test cylinder balance to identify which cylinder is underperforming.

Cylinder Leakdown Test

Explains how to perform a leakdown test to assess cylinder sealing capability and identify leaks.

Checking Cooling System

Outlines how to check the engine's cooling system for leaks and proper operation.

Testing Radiator Cap

Check Oil Pressure

Outlines the procedure for checking engine oil pressure at a specified RPM.

Testing DC Output Charging Wire

Battery Installation

Hard Starting

Lists common causes and checks for engines that are difficult to start.

Check Ignition (Engine Running)

Explains how to check ignition system performance while the engine is running, identifying misfires.

Fuel Shut-Off Solenoid

Explains the function of the fuel shut-off solenoid and how it affects engine starting and running.

Testing Solenoid

Compression Testing Using Leakdown Tester

Provides detailed steps for using a leakdown tester to measure compression and identify potential faults.

Pressure Testing Cooling System

Details the procedure for pressure testing the cooling system to detect leaks.

Checking Thermostat

Charging System

Explains the engine's 20 amp regulated alternator system and its components.

Testing Regulator-Rectifier

Explains how to test the regulator-rectifier's function and mounting.

Checking Battery

Cooling System Pressurized Warning

Alerts users to the danger of pressurized hot coolant when removing the radiator cap.

Systematic Check

Recommends a systematic approach to diagnose engine starting issues, focusing on ignition, carburetion, and compression.

Check Ignition (Fouled Plug or Other Causes)

Details methods to diagnose ignition issues related to spark plugs or cylinder function.

Check Oil Pressure Switch

Troubleshooting Charging System

Lists common problems associated with the charging system, such as 'Battery not charging.'

Testing Alternator Output

Provides steps for testing the alternator's AC output and DC charging capability.

Equipment Affecting Engine Operation

Hard Starting or Will Not Start

Lists common equipment-related causes for engine starting difficulties.

SECTION 3 ENGINE DISASSEMBLY

Section 3 - Engine Disassembly

Remove Carburetor

Remove Cylinder Heads

Remove Crankcase Cover

Remove Camshaft

Remove Pistons, Rods, Crankshaft

Guides on removing the piston, connecting rod, and crankshaft assemblies from the engine.

SECTION 4 ENGINE OVERHAUL

Check Cylinder

Describes how to inspect cylinder bores for wear, scoring, or damage, and check head mounting surface.

Section 4 - Engine Overhaul

Resizing

Explains the process of resizing cylinder bores to a standard oversize for new piston rings.

Cylinder Finish (Cross Hatch)

Bearings

Covers inspection of magneto and PTO bearings for wear or damage.

Check PTO Bearing

Piston, Rings and Connecting Rod Disassembly and Inspection

Guides on disassembling and inspecting pistons, rings, and connecting rods.

Check Ring End Gap

Cylinder Head Inspection and Repair

Outlines procedures for inspecting cylinder heads for cracks, damage, and distortion.

Assemble Cylinder Head

Oil Pump

Removing Water Pump Seal

Replacing Pinion Gear Assembly

Carburetor Inspection and Repair

Covers disassembly, cleaning, and inspection of the carburetor for wear or damage.

Check Camshaft Bearings

Crankshaft

Check Piston And Rings

Inspect And Repair

Details checking cylinder head mounting surfaces and valve guide bushings for wear.

Replacing Water Pump Seal

Installing Water Pump Seal

Assemble Starter

Disassemble Carburetor

Check Crankshaft

Check Piston Pin And Connecting Rod

Reface Valves And Seats

Replacing Starter Solenoid

Check Camshaft

Section 5 - Engine Assembly

Install Piston and Connecting Rod

Provides detailed steps for installing pistons and connecting rods into the cylinder bores.

Install Camshaft

Install Flywheel

Adjust Valve Clearance

Details how to set the valve clearance for both cylinders, including torque specifications.

Install Fan Assembly

Adjust Governor

Details the critical steps for performing a static adjustment of the engine's governor.

Air Cleaner Assembly Installation

Install Cylinder Heads

Install Carburetor and Intake Elbow Assembly

Install Air Cleaner Assembly

Install Crankcase Cover

Install Rocker Arms

Section 6 - Final Adjustments & Specifications

Carburetor Adjustment

Final Carburetor Tune Adjustment

Model 473100 Specifications

Lists key specifications for the Model 473100 engine, including common and fastener specs.

Standard And Reject Dimensions

Lists standard and reject dimensions for critical engine components like cylinders, bearings, and shafts.

Engine Harness Diagram

Illustrates the engine's electrical harness, showing wire colors and connector functions.

Initial Carburetor Adjustment

Carburetor Adjustment Procedure

Details the step-by-step process for adjusting idle speed, mixture screws, and governed idle speed.

Common Specifications

Provides general engine specifications such as bore, displacement, and capacities.

Final Carburetor Adjustment

Fastener Specifications

Lists torque values for various fasteners used in engine assembly and maintenance.