OPERATION

WARNING: Be sure to read the fuel information in the safety rules before you be- gin. If you do not understand the safety rules, do not attempt to fuel your unit. Contact an au- thorised service dealer.

FUELING ENGINE

WARNING: Remove fuel cap slowly when refueling.

This engine is certified to operate on unleaded petrol. Before operation, petrol must be mixed with a good quality 2--cycle air--cooled engine oil designed to be mixed at a ratio of 40:1. A 40:1 ratio is obtained by mixing 5 liters of unleaded petrol with 0,125 liter of oil. DO NOT USE auto- motive oil or marine oil. These oils will cause en- gine damage. When mixing fuel, follow instruc- tions printed on oil container. Once oil is added to petrol, shake container momentarily to assure that the fuel is thoroughly mixed. Always read and follow the safety rules relating to fuel before fueling your unit.

CAUTION: Never use straight petrol in your unit. This will cause permanent engine damage.

FUEL REQUIREMENTS

Use good quality unleaded petrol. The lowest recommended octane grade is 90 (RON).

IMPORTANT

Use of alcohol blended fuels (more than 10% al- cohol) can cause major engine performance and durability problems.

WARNING: Incorrect use of fuel and/ or lubricants will cause problems such as: improper clutch engagements, overheat- ing, vapor lock, power loss, lubrication defi- ciency, deterioration of fuel lines, gaskets and internal carburetor components, etc. Alcohol blended fuels will cause a high ab- sorption of moisture in the fuel/oil mixture, causing the separation of oil and fuel.

HOW TO STOP YOUR UNIT

S To stop the engine, move the ON/STOP switch to the STOP position.

ON/STOP

Switch

HOW TO START YOUR UNIT

WARNING: Avoid any contact with the muffler. A hot muffler can cause serious burns.

STARTING A COLD ENGINE (or a warm engine after running out of fuel)

Starting position

NOTE: The throttle lock--out is designed to prevent unintentional use of the throttle trig- ger. The lock--out must be pressed with the palm of your hand as you grip the throttle han- dle before the trigger can be used.

1.Set unit on a flat surface.

2.Move ON/STOP switch to the ON position.

3.Slowly press the primer bulb 6 times.

4.Move choke lever to FULL CHOKE posi- tion.

Primer Bulb

Choke

Lever

Starter

Handle

5.Set the throttle to the start position by first pressing the throttle lock--out and the throttle trigger, then pressing the start throttle button. Then release the throttle lock--out and the throttle trigger, followed by the start throttle button. The throttle function is now activated.

NOTE: The start throttle button should stay depressed, holding the throttle open. If not, re- peat step 5. To return the engine to idle, press the throttle lock--out and throttle trigger again.

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McCulloch MAC 250 B Operation, Fueling Engine, Fuel Requirements, HOW to Stop Your Unit, HOW to Start Your Unit
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MAC 250 B specifications

The McCulloch MAC 250 B chainsaw is a powerful and reliable tool that is well-suited for both professional and home users. It is designed to tackle a variety of tasks, from cutting firewood to pruning trees, making it a versatile choice for any outdoor enthusiast.

One of the standout features of the MAC 250 B is its robust engine. The chainsaw is equipped with a 25cc, air-cooled, two-stroke engine that provides a high power-to-weight ratio. This means that despite its relatively lightweight design, the MAC 250 B delivers impressive performance. The engine is engineered for efficient fuel consumption, allowing users to complete their tasks without the need for frequent refueling.

The chainsaw also features a 12-inch guide bar, which strikes a perfect balance between cutting capability and maneuverability. This makes it particularly effective for pruning and small to medium-sized tree maintenance. The chainsaw's chain is designed for easy sharpening and replacement, ensuring that users can keep their tool in optimal condition for the best cutting performance.

Safety is a paramount design consideration for the MAC 250 B. It is equipped with several safety features, including a chain brake that automatically stops the chain in the event of a kickback, protecting the user from potential injuries. Additionally, the chainsaw has an easy-to-access on/off switch, allowing for quick shut-off when needed.

Another notable aspect of the McCulloch MAC 250 B is its user-friendly design. The chainsaw has a comfortable handle that provides a solid grip, reducing fatigue during extended use. The lightweight construction, coupled with the well-balanced design, allows users to maneuver the chainsaw with ease, even in tight spaces.

In terms of maintenance, the MAC 250 B is designed for easy access to spark plugs and air filters, which simplifies routine upkeep. This ensures that the chainsaw remains in peak working condition with minimal effort, enhancing its longevity.

Overall, the McCulloch MAC 250 B is an excellent choice for those seeking a reliable and efficient chainsaw. With its combination of power, safety features, and ergonomic design, it is equipped to handle a range of outdoor tasks, making it a valuable tool for both novices and experienced users alike.
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