Toro 51603 - Foreword

FOREWORD'
This Maintenance and Repair Guide will provide you with complete information necessary to
accomplish the maintenance and repair of gasoline-powered flexible line trimmers powered by
the new line of the lightweight two-cycle engines manufactured by The Tor0 Company
The number of repair procedures for this line of engine;s has been limited for simplicity and
economy The repairs are easy to accomplish. even for operators or mechanics who have
limited experience in the repair of small two-cycle engines
Should you require additional information concerning these trimmers. we urge you to write to
us Address inquiries to:
The Tor0 Company
8111 Lyndale Avenue South
Minneapolis MN 55420
Attn.. Service Department
TABLE OF CONTENTS
PAGE
Two-cycle Engine -Theory of Operation 1
Engine operation
1
Engine Specifications
3
Engine Torque Specifications
3
Air Cleaner Maintenance 4
General Information 1-3
Maintenance Procedures ...................................... 4-7
Exhaust system Maintenance 4
Flexible Drive Shaft Maintenance 5
Carburetor Adjustments; Model TC-1500 (Tillotson Carburetor) 5-6
Carburetor Adjustments; Models TC-300 & TC-400 (Walbro carburetor) 6-7
Testing Cylinder Compression 7
Checking Fuel Tank venting 8
Engine Troubleshooting Chart 9
Troubleshooting and Test Procedures 7-9
Preliminary Checks: 7
Compression Test Procedure 7
Checking For Spark 8
Checking Fuel Tank 8
Checking the Stop Switch 8
Disassembly. Repair. Reassembly Instructions 10-18
Trimmer Engine Removal. Disassembly. Replacement 10
Starter Rope Replacement 12
Starter Assembly Replacement ......................................
Walbro Carburetor Servicing 14
Cutter Head Troubleshooting Chart 16
Walbro Carburetor Operation 13
Clutch Repair 17
Automatic Line Feed Repair 18