Stihl BR 450 BR 450 C Instruction Manual

Pages 84

Year 2020

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Stihl BR 450 BR 450 C Specification

The Stihl BR 450 and BR 450 C are backpack blowers designed for efficient and powerful clearing of leaves and debris in both residential and professional settings. Both models are equipped with a robust 63.3 cc 2-stroke engine that delivers a maximum air velocity of approximately 219 mph (miles per hour) and an air volume of 642 cfm (cubic feet per minute), providing superior performance and reliability. The BR 450 C model includes the additional convenience of the Stihl Easy2Start system, which reduces the effort needed to start the engine, making it particularly user-friendly.

These backpack blowers feature an ergonomic design to enhance user comfort during extended periods of operation. The adjustable support harness distributes weight evenly, reducing operator fatigue and improving maneuverability. The controls are intuitive and conveniently located on the multi-function control handle, allowing for easy access and operation without needing to remove hands from the handle. The blowers are also equipped with a variable speed throttle trigger and a throttle lock, offering precise control of the airspeed and volume for different tasks.

Both models incorporate a telescopic tube design, which can be easily adjusted to match the user's height and the specific requirements of the job, enhancing overall efficiency and effectiveness. The Stihl BR 450 and BR 450 C are built with durable components to withstand the demands of frequent use, ensuring longevity and dependable performance. These backpack blowers provide a balance of power, comfort, and convenience, making them an ideal choice for landscape professionals and homeowners seeking a high-quality solution for their outdoor cleaning needs.

Stihl BR 450 BR 450 C F.A.Q.

How do I start the Stihl BR 450 backpack blower?

To start the Stihl BR 450, ensure the blower is on a flat surface. Set the choke lever to the closed position if the engine is cold, and press the fuel pump bulb several times until fuel is visible. Pull the starter cord until the engine fires, then move the choke to the open position and pull again to start.

What should I do if my blower won't start?

Check the fuel level and ensure fresh, properly mixed fuel is used. Inspect the spark plug for damage or wear, and clean or replace it if necessary. Also, ensure the air filter is clean and not clogged. If the issue persists, consult a professional technician.

How often should I clean the air filter?

The air filter should be checked before each use and cleaned every 10 hours of operation. A clogged air filter can cause the blower to run poorly or not start at all. Replace the filter if it's damaged or very dirty.

How do I maintain the spark plug on my BR 450?

Inspect the spark plug every 25 hours of operation. Clean the electrode with a wire brush and check the gap with a feeler gauge. The gap should be set to 0.02 inches (0.5 mm). Replace the plug if it's worn or damaged.

What type of fuel should I use for the BR 450?

Use a high-quality 89 octane or higher unleaded gasoline mixed with a 2-cycle engine oil at a ratio of 50:1. Using the correct fuel mix ensures optimal performance and longevity of the engine.

How do I adjust the throttle cable on the BR 450 C?

To adjust the throttle cable, locate the cable adjuster near the handle. Turn the adjuster to remove any slack in the cable, ensuring the throttle trigger fully opens the throttle valve when pressed. This adjustment ensures responsive throttle control.

What regular maintenance should be performed on the blower?

Regular maintenance includes checking and cleaning the air filter, inspecting and cleaning the spark plug, checking the fuel system for leaks, and ensuring all screws and fasteners are tight. Also, inspect the blower tubes for cracks or damage.

How do I store the blower during the off-season?

For off-season storage, empty the fuel tank and run the blower until the engine stops. Clean the blower thoroughly and store it in a dry, dust-free location. It is advisable to remove the spark plug and add a few drops of oil into the cylinder for lubrication.

How do I troubleshoot excessive vibration in my blower?

Excessive vibration can be caused by loose parts, a damaged impeller, or misalignment. Check for any loose screws or fasteners, and inspect the impeller for damage. Tighten any loose components and replace damaged parts as needed.

What should I do if the blower produces unusual noises?

Unusual noises may indicate a problem with the engine or other components. Check for any loose parts, debris in the blower fan, or engine knocking. Address any loose components immediately and consult a professional if the noise persists.