Product Type:
Air-cooled L-Head (side-valve) twin-cylinder gasoline engine
Model Series:
400400, 400700, 402400, 402700, 404400, 404700, 422400, 422700, 462700 (sleeve bore)
Additional Model Series:
401400, 401700, 421400, 421700 (aluminum bore)
Rated Output:
16 horsepower
Cylinder Configuration:
Twin cylinder, horizontally opposed
Valve Configuration:
L-Head (side-valve / flathead)
Production Years Covered:
N/A - exact production year range not stated in source material
Target Audience:
Owners, mechanics, and technicians servicing 16-HP L-Head twin engines
Class:
Heavy-duty air-cooled powerplant for lawn, garden, and utility equipment
Competitive Advantage:
Robust design and reliable performance with broad application coverage
Manufacturer Heritage:
Briggs & Stratton is a long-established small-engine manufacturer
Design:
L-Head twin-cylinder layout with proven reliability
Bore Types:
Sleeve bore and aluminum bore construction options
Applications:
Wide range of equipment requiring dependable power
Serviceability:
Supported by this dedicated factory-style service manual
Engine Models:
400400, 400700, 402400, 402700, 404400, 404700, 422400, 422700, 462700
Additional Engine Models:
401400, 401700, 421400, 421700
Systems Covered:
Lubrication, cooling, fuel, ignition, starting, electrical, and controls
Procedures:
Engine disassembly and assembly plus major system service
Page Count:
N/A - page count not specified in source material
Manual Type:
Service Repair Manual
Delivery:
Instant download
Lubrication System:
Oil type, oil pump, lubrication service specifications
Cooling System:
Air cooling, cooling fins, blower housing and airflow service
Fuel System:
Carburetor, fuel pump, fuel lines, fuel tank and filter service
Ignition System:
Spark plug, coil, magneto, and ignition timing
Starting System:
Recoil and electric starter service and troubleshooting
Electrical System:
Battery charging, alternator, switches, wiring
Controls:
Governor, throttle, choke, and control linkage
Disassembly:
Step-by-step teardown of the twin-cylinder engine
Inspection:
Measuring and evaluating wear on engine components
Cylinder and Piston:
Bore inspection, piston and ring service
Crankshaft and Bearings:
Crankshaft, bearing, and end-play service
Valves:
L-Head valve, valve seat, and valve adjustment procedures
Assembly:
Reassembly and torque specifications
Technical Depth:
Factory-style specifications, clearances, and step-by-step instructions
Diagrams:
High-definition illustrations and diagrams
Parts Information:
Component identification to support part look-up
Troubleshooting:
Diagnostic guidance for common engine faults
Maintenance:
Routine service and adjustment guidance
Printing:
Printable pages for workshop use
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Family:
Briggs & Stratton L-Head twin cylinder
Rated Output:
16 horsepower
Cylinder Configuration:
Two-cylinder horizontally opposed
Bore Type:
Sleeve bore and aluminum bore variants
Cooling:
Forced air cooling
Ignition:
Magneto / spark ignition
Exact Displacement:
N/A - not specified for this engine family in source material
Torque Values:
Refer to the manual's assembly torque tables
Transmission Type:
N/A - engine manual; no transmission is part of this engine
Standard Transmission:
Not applicable to a standalone engine
Optional Transmission:
Not applicable to a standalone engine
Features:
Governor-controlled output speed; throttle and choke linkage adjustments within manual scope
Wheelbase:
N/A - engine, not a complete vehicle
Length:
N/A - engine, not a complete vehicle
Curb Weight:
N/A - not specified in source material
Physical Details:
Dimensions and mounting details are provided in the manual's engine specification tables
Crash Test Ratings:
N/A - engine, not a road vehicle
Active Features:
N/A - engine, not a complete vehicle
Passive Features:
N/A - engine, not a complete vehicle
Operator Safety:
Follow manual instructions for safe servicing of fuel, ignition, and electrical systems
Infotainment:
N/A - engine, no infotainment system
Driver Assistance:
N/A - engine, no driver assistance systems
Electrical:
Battery charging and electrical system service covered in the manual
Controls:
Governor, throttle, and choke control systems covered in the manual
Service Intervals:
Follow the maintenance schedule in the manual for oil, air filter, and spark plug service
Engine Oil:
Use the oil grade and viscosity specified for the operating temperature range in the manual
Air Filter:
Inspect and service at the intervals given in the manual
Spark Plug:
Clean, gap, and replace per manual specifications
Fuel System:
Clean or service carburetor and fuel filter as specified
Common Wear Items:
Air filter, spark plugs, oil, fuel filters, and ignition components
Cylinder Wear:
Inspect bore and rings for wear on high-hour engines
Valve Service:
Check and adjust L-Head valves as specified in the manual
Cooling:
Keep cooling fins and blower housing clean to avoid overheating
Manufacturer:
Briggs & Stratton
Brand Heritage:
Long-established manufacturer of small air-cooled engines
Model Evolution:
L-Head twin cylinder 16-HP engines offered in sleeve bore and aluminum bore versions
Production Location:
N/A - not specified in source material
Application Era:
Widely used in utility and garden equipment requiring dependable power
