Product Type:
2-Cycle Engine
Models Covered:
AH520, AH600, AV520, AV600, HSK600, TVS600
Model Identification:
Engine model and spec numbers stamped on engine. Refer to interpretation of model number section. Type/specification numbers 638-670 and 1398-1642 also covered.
Also Covers:
Craftsman 200 Series Models
Production Years:
N/A - not specified for this manual
Audience:
Technicians and DIY owners
Comprehensive Coverage:
Covers General Information, engine identification, operation, maintenance, and repair for 2-cycle engines
Clear Instructions:
Step-by-step procedures with detailed illustrations
Troubleshooting:
Includes troubleshooting charts for common engine problems
Engine Identification:
Location and interpretation of model and specification numbers
Engine Care:
Routine maintenance and storage procedures
Short Blocks:
Service and replacement information
Tune-Up Procedure:
Step-by-step tune-up instructions
Exhaust Port Cleaning:
Procedure for cleaning exhaust ports
Theory of Operation:
Explanation of 2-cycle engine operation
Piston Port Style:
Operation of piston ported engines
Reed Ported Style:
Operation of reed ported engines with loop scavenging
Terminology:
Definitions of exhaust or scavenge phase, ports, exhaust ports, third port, reed valve
Lubrication and Air Cleaners
Lubrication:
Fuel mixture and lubrication requirements
Air Cleaners:
Service and maintenance of air cleaner systems
General Carburetor Information:
Overview of carburetor types and operation
Float Type Carburetors:
Service, adjustments, and checks
Diaphragm Carburetors:
Service, adjustments, and checks
Inlet Needle and Seat:
Operation, pop-off test, float height settings
Linkage Installation:
Governor and throttle linkage adjustment
Troubleshooting:
Diagnosis of carburetion problems
Rewind Starters:
Components, rope service, stylized rewind starter, vertical pull starters
Electric Starters:
Drive assembly service, starter checking, field and armature checks, troubleshooting
Alternators:
Checking the system and service procedures
Ignition:
Ignition service and troubleshooting
Flywheel Brake System:
Inside-edge brake system, components, service, control cable adjustment
Engine Fails to Start:
Diagnosis and repair
Engine Knocks:
Causes and solutions
Engine Misses Under Load:
Diagnosis and repair
Engine Lacks Power:
Causes and remedies
Engine Overheats:
Diagnosis and cooling system checks
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 Types:
2-cycle, air-cooled
Models:
AH520, AH600, AV520, AV600, HSK600, TVS600
Displacement:
N/A - not specified in available description
Bore and Stroke:
N/A - not specified in available description
Horsepower:
N/A - not specified in available description
Fuel System:
Float type or diaphragm carburetor
Lubrication:
Fuel-oil mixture (2-cycle)
Wheelbase:
N/A - not applicable to engine service manual
Length:
N/A - not applicable to engine service manual
Width:
N/A - not applicable to engine service manual
Height:
N/A - not applicable to engine service manual
Curb Weight:
N/A - not applicable to engine service manual
Dry Weight:
N/A - not specified in available description
Service Intervals:
Refer to tune-up procedure in manual
Fluid Specifications:
Fuel-oil mixture as specified in manual
Common Wear Items:
Air cleaners, spark plugs, carburetor components, starter ropes, brake components
Brand Heritage:
Tecumseh Products Company
Model Evolution:
Covered models include AH520, AH600, AV520, AV600, HSK600, TVS600; also Craftsman 200 Series
Production Location:
N/A - not specified in available description
