1
PLEASE READ
Dear Customer,
Thank you for purchasing a McCulloch product. With prop-
er operation and maintenance, it will provide you with years
of service.
In order to make the best use of your investment, be CER-
TAIN to familiarize yourself with the contents of the
ENTIRE user manual before attempting to operate and
maintain your unit.
Be sure to carefully follow the step-by-step instructions in
this manual to start, operate and maintain your new prod-
uct.
In the manual there will be the following call-outs: NOTE:,
WARNING / CAUTION and WARRANTY.
A NOTE: is used to convey additional information, to high-
light a particular explanation, or to expand a step descrip-
tion.
A WARNING or CAUTION identifies a procedure which, if
not undertaken or if improperly done, can result in serious
personal injury and/or damage to the unit.
The (WARRANTY SYMBOL) serves notice that unless
instructions or procedures are followed, any damage
caused will void the warranty and repairs will be at owner’s
expense.
Pay particular attention to the safety precautions. They are
written for your protection and contain important informa-
tion you must know to safely operate your chain saw.
FOR WARRANTY OR SERVICE CONTACT THE NEAR-
EST AUTHORIZED SERVICE CENTER - LOCATE YOUR
NEAREST SERVICE CENTER BY CALLING THE TOLL
FREE NUMBER IN THIS MANUAL.
TABLE OF CONTENTS
1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . .2
1-1. Specifications
2 GENERAL IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . .3
2-1. General Identification
2-2. Safety Features
3 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3-1. What To Do
3-2. Brush/Grass Blade Safety Precautions
3-3. What No To Do
3-4. International Symbols
4 ASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . .6
4-1. “P” Handle Assembly
4-2. “J” Handle Assembly
4-3. Blade Gurd Installation
4-4. Debris Shield
4-5. Stringhead Installation
4-6. Debris Shield Installation
4-7. Blade Installation
4-8. Installing the Attachment
5 FUEL AND LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . .10
5-1. Fuel
5-2. Mixing Fuel
5-3. Fuel Mixing Table
5-4. Recommended Fuels
5-5. Fuel and Lubrication Symbols
6 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . .11
6-1. Shoulder Harness
6-2. Starting a Cold Engine
6-3. To Stop Engine
6-4. Warm Engine Start
6-5. Idling/Carburetor Adjustment
7TRIMMING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . .13
7-1. Additional Safety Precautions
7-2. Stringhead Line Release
7-3. Trimming Procedures
7-4. Cutting With Blades
7-5. Using Weed Blades
7-6. Using a Brush Blade
8 MAINTENANCE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . .15
8-1. Replacing Cutter Line
8-2. Air Filter
8-3. Fuel Cap / Fuel Filter
8-4. Carburetor Adjustment
8-5. Spark Plug
8-6. Spark Arrester Screen
8-7. Debris Shield Knife Sharpening
8-8. Storing a Unit
9TROUBLESHOOTING THE ENGINE . . . . . . . . . . . . . . . . . .19
10 PART LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
INTRODUCTION 1 - GENERAL INFORMATION
1-1. SPECIFICATIONS
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air-cooled, 2-Cycle, Chrome Cylinder
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30cc / 1.8 ci
Dry Weight (MT3075/MT3090) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14.1 lbs. / 6.4 kg
(MT30775/MT30790) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14.3 lbs. / 6.5 kg
Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18.6 oz. / 550 ml
Drive Shaft Length (MT3075/MT3090) . . . . . . . . . . . . . . . . . . . . . . . . . .52” / 132cm
(MT30775/MT30790) . . . . . . . . . . . . . . . . . . . . . . .26” + 26” / 66cm + 66cm
Cutting Swath (Twin Line Head ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17" / 43cm
(Blade - MT3090/MT30790) . . . . . . . . . . . . . . . . . . . . . .9” / 23cm
Handle (MT3075) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .“P” Handle
(MT30775/MT3090/MT30790) . . . . . . . . . . . . . . . . . . . . . . . . . . . “J” Handle
Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Primer / Diaphragm Type
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Champion DJ8J or equivalent
Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clutch
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