OPERATION

1. Starting

WARNING

•Never attempt engine start in a place where the fuel has been supplied. When starting the engine, keep a distance of at least 3 m.

-Otherwise, it will may cause ignition or fire.

•Exhaust gas from the engine has toxic consequences. Do not operate the engine in a poorly-ventilated place, such as in a tunnel, building, etc.

-Operating the engine in the poorly-ventilated place may cause poisoning by exhaust gas.

•In case of detection of any abnormality in sound, odor, vibration after start, stop the engine immediately and carry out inspection.

-If the engine is operated without attending such abnormality, an accident may occur.

•Confirm that the engine stops when the stop switch is set to “O” position.

1)When the engine is cold, or when the fuel it refueled

(1)Set this machine on a flat space.

(2)Set the stop switch to “ I “ position.

(3)Continue to push the primer pump until fuel enters into the

primer pump.

•In general, fuel enters into the carburetor by 7 to 10 pushes.

•If the primer pump is pushed excessively, an excess of gasoline returns to the fuel tank.

(4)Lifting the choke lever of the air cleaner right side, close the choke lever.

(5)Hold the main handle with a left hand to prevent the engine from moving, settle down to take the stable position.

(6)Pull out slowly the starter handle till a certain resistance is felt.

Return the starter handle backward once from this position, then pull it out with force.

•Never pull the rope to the full.

•Once the start knob is pulled, never release your hand

immediately. Hold the start knob until it returns to its original point.

(7) When the engine starts, open the choke lever.

•Open the choke lever progressively while checking the engine operation. Be sure to open the choke lever to the full in the end.

•In cold or when the engine is cooled down, never open the

choke lever suddenly. Otherwise, the engine may stop.

(8)Continue warm-up operation for 2 to 3 minutes.

(9)Rotation of the engine speed stabilizes and when from low speed making at high speed rotation, if reaches the point where it accelerates smoothly, it is completion of warming-up.

(2)

Stop Switch

(3)

Primer pump

(4)

Close

 

 

 

 

 

 

 

 

 

(6)

(7)

Open

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Dolmar PB-250.4 instruction manual Operation, Starting, When the engine is cold, or when the fuel it refueled
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PB-250.4 specifications

The Dolmar PB-250.4 is a robust and efficient backpack blower designed for both commercial and residential use. Known for its powerful performance and user-friendly operation, the PB-250.4 stands out as a reliable choice for landscaping professionals and homeowners alike.

One of the main features of the Dolmar PB-250.4 is its impressive engine. Equipped with a 24.5 cc, 2-stroke engine, it delivers a commendable airflow of up to 700 CFM (cubic feet per minute) and a maximum airspeed of 160 mph. This power allows users to tackle heavy debris, leaves, and grass clippings with ease, making yard maintenance swift and effective.

The design of the PB-250.4 emphasizes comfort and ergonomic use. It comes with a padded shoulder harness, which distributes the weight evenly and reduces fatigue during extended use. Additionally, the adjustable throttle and ergonomic handle provide better control and precision, enhancing the overall user experience.

The technology behind the Dolmar PB-250.4 reflects a commitment to efficiency and environmental responsibility. The blower incorporates the advanced 2-stroke engine technology, which not only provides superb power but also integrates a clean-air system that reduces emissions, making it a more eco-friendly option compared to older models.

Easy starting is another characteristic that sets the PB-250.4 apart. The blower is equipped with a reliable starting system that minimizes resistance for an effortless start, even in cold conditions. This feature is particularly beneficial for users who may need to start and stop the blower frequently throughout their tasks.

Maintenance of the PB-250.4 is straightforward, thanks to its accessible components and design features. The air filter can be easily cleaned and replaced, ensuring that the engine runs optimally with minimal downtime.

In summary, the Dolmar PB-250.4 is a high-performance backpack blower that combines power, efficiency, and comfort in a user-friendly package. Its robust engine, ergonomic design, and commitment to low emissions make it an excellent choice for anyone looking to maintain their outdoor spaces effectively. Whether for professional landscaping or home use, the PB-250.4 delivers the performance and reliability users demand.
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