1. Introduction
This manual provides detailed repair and maintenance procedures for Briggs & Stratton Twin Cylinder "L" Head engines, specifically covering model 271172. It is intended for use by qualified service technicians and experienced individuals familiar with engine repair. Adherence to the instructions and safety precautions outlined in this manual is crucial for safe and effective service, ensuring the longevity and optimal performance of your engine.
Using genuine Briggs & Stratton OEM parts, such as this manual, ensures compatibility and reliability for your equipment. Refer to this guide for accurate information regarding disassembly, inspection, repair, reassembly, and adjustment of engine components.
2. Safety Information
Always prioritize safety when performing any engine repair or maintenance. Failure to follow safety instructions can result in serious injury or damage to the equipment.
- Read the Entire Manual: Before beginning any procedure, thoroughly read and understand all instructions and warnings in this manual.
- Wear Personal Protective Equipment (PPE): Always wear appropriate safety glasses, gloves, and other protective gear as required.
- Disconnect Spark Plug: To prevent accidental starting, always disconnect the spark plug lead(s) before working on the engine.
- Fuel Safety: Work in a well-ventilated area. Do not smoke or allow open flames near fuel. Handle fuel carefully to prevent spills.
- Hot Surfaces: Engines and exhaust components can remain hot for an extended period after operation. Allow the engine to cool before servicing.
- Proper Tools: Use only the correct tools for each task to prevent damage to fasteners and components.
3. Engine Overview and Identification
This section provides a general overview of the Briggs & Stratton Twin Cylinder "L" Head engine design and guides you on locating essential identification information.
Image 1: Front cover of the Briggs & Stratton Twin Cylinder "L" Head Repair Manual. The cover displays the Briggs & Stratton logo and the title "Twin Cylinder 'L' Head Repair Manual" with line drawings of various engine configurations.
To ensure you are using the correct repair procedures, always verify your engine's model, type, and code numbers. These numbers are typically stamped into the engine shroud or a metal plate attached to the engine. Refer to your engine's specific location for these identifiers.
4. Preparation for Repair
Proper preparation is key to a successful and safe repair. Before starting any work, ensure you have the necessary tools and a suitable work environment.
- Work Area: Choose a clean, well-lit, and well-ventilated area. Ensure there is enough space to safely work around the engine and lay out parts.
- Tools: Gather all required hand tools, specialized tools, and measuring instruments as specified in the relevant repair section.
- Cleaning: Clean the exterior of the engine to prevent dirt and debris from entering internal components during disassembly.
- Fluid Drainage: Drain engine oil and fuel into appropriate containers before beginning any major disassembly. Dispose of fluids responsibly.
- Battery Disconnection: If the engine is connected to a battery, disconnect the negative (-) terminal first to prevent electrical shorts.
5. Maintenance Procedures
Regular maintenance is essential for the longevity and reliable operation of your Briggs & Stratton engine. This section covers common maintenance tasks.
5.1. Engine Oil Change
Change engine oil after the first 5 operating hours, then every 50 operating hours or annually, whichever comes first. Refer to your engine's specific oil capacity and recommended oil type.
- Run the engine for a few minutes to warm the oil.
- Stop the engine and disconnect the spark plug lead.
- Place a suitable container under the oil drain plug.
- Remove the oil drain plug and allow all oil to drain.
- Reinstall the drain plug securely.
- Refill with the recommended amount and type of new engine oil.
- Check the oil level using the dipstick; do not overfill.
5.2. Spark Plug Inspection and Replacement
Inspect spark plugs annually or every 100 operating hours. Replace if electrodes are worn or fouled.
- Remove the spark plug lead(s).
- Use a spark plug wrench to remove the spark plug(s).
- Inspect the electrodes for wear, carbon buildup, or damage.
- Clean light deposits with a wire brush.
- Check the spark plug gap with a feeler gauge and adjust if necessary (refer to engine specifications for correct gap).
- Install new or cleaned spark plug(s) and tighten to the specified torque.
- Reconnect the spark plug lead(s).
5.3. Air Filter Service
Clean or replace the air filter regularly, especially in dusty conditions. A dirty air filter can reduce engine performance and increase fuel consumption.
- Remove the air filter cover.
- Remove the air filter element.
- Inspect the element for dirt and damage.
- Clean foam elements with warm, soapy water, rinse, and allow to air dry. Lightly oil foam elements before reinstalling.
- Replace paper elements if they are dirty or damaged. Do not wash paper elements.
- Reinstall the air filter element and cover securely.
6. Troubleshooting Guide
This section provides a basic guide to help diagnose and resolve common engine issues. For complex problems, consult a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel, stale fuel, fouled spark plug, clogged fuel filter, weak battery | Check fuel level, replace stale fuel, clean/replace spark plug, replace fuel filter, charge/replace battery |
| Engine runs rough or misfires | Dirty air filter, fouled spark plug, carburetor issues, incorrect valve clearance | Clean/replace air filter, clean/replace spark plug, clean carburetor, adjust valves (refer to specific repair section) |
| Loss of power | Dirty air filter, restricted exhaust, incorrect engine speed, worn components | Clean/replace air filter, check exhaust for blockages, adjust engine speed, inspect internal components for wear |
| Excessive smoke | Incorrect oil level, wrong oil type, worn piston rings/valve guides | Check oil level and type, consult a technician for internal engine inspection |
7. Specifications
The following specifications pertain to the physical dimensions and weight of this Briggs & Stratton 271172 Repair Manual itself, not the engine it describes.
- Product Dimensions: 1 x 7 x 8 inches
- Item Weight: 14.9 ounces
- Manufacturer: Briggs & Stratton
- ASIN: B002WNWAEC
For detailed engine specifications (e.g., torque values, clearances, capacities), refer to the specific sections within this repair manual relevant to the component being serviced.
8. Warranty and Support
As a Genuine Original Equipment Manufacturer (OEM) part, this Briggs & Stratton repair manual is designed to provide accurate and reliable information for servicing your engine. Using OEM parts and following official repair procedures helps maintain your engine's warranty and performance.
For further assistance, specific engine warranty information, or to locate an authorized Briggs & Stratton service dealer, please visit the official Briggs & Stratton website or contact their customer support. Always provide your engine's model, type, and code numbers when seeking support.
