Primer Bulb

Choke

Lever

Starter Handle

5.Pull starter rope handle sharply until engine sounds as if it is trying to start, but do not pull rope more than 6 times.

6.As soon as engine sounds as if it is trying to start, move choke lever to HALF CHOKE position.

7.Pull starter rope sharply until engine runs, but no more than 6 pulls.

NOTE: If the engine doesn’t start after 6 pulls (at the HALF CHOKE position), move the choke lever to the FULL CHOKE position and press the primer bulb 6 times. Squeeze and hold the throttle trigger and pull the starter rope 2 more times. Move the choke lever to the HALF CHOKE position and pull the start- er rope until the engine runs, but no more than 6 pulls. If the engine still doesn’t start, it is probably flooded. Proceed to

STARTING A FLOODED ENGINE.

8.Once the engine starts, allow it to run 10 se- conds, then move the choke lever to the RUN position. Allow the unit to run for 30 more seconds at RUN before releasing the throttle trigger.

NOTE: If engine dies with the choke le- ver in the RUN position, move the choke lever to the HALF CHOKE position and pull the rope until engine runs, but no more than 6 pulls.

STARTING A WARM ENGINE

1.Move the choke lever to the HALF CHOKE position.

2.Squeeze and hold the throttle trigger. Keep throttle trigger fully squeezed until the engine runs smoothly.

3.Pull starter rope sharply until engine runs, but no more than 6 pulls.

4.Allow engine to run 15 seconds, then move the choke lever to the RUN position.

NOTE: If engine has not started, pull starter rope 5 more pulls. If engine still does not run, it is probably flooded.

STARTING A FLOODED ENGINE

Flooded engines can be started by placing the choke lever in the RUN position; then, pull the rope to clear the engine of excess fuel. This could require pulling the starter handle many times depending on how badly the unit is flooded. If the unit still doesn’t start, refer to TROUBLESHOOTING TABLE or call 1-800-554--6723.

OPERATING INSTRUCTIONS

It is recommended that the engine not be operated for longer than 1 minute at full throttle.

OPERATING POSITION

ALWAYS WEAR:

Eye protection

Long pants

Heavy shoes

Cut from your left to your right.

WARNING: Always wear eye protec- tion. Never lean over the trimmer head. Rocks or debris can ricochet or be thrown into eyes and face and cause blindness or other serious injury.

Do not run the engine at a higher speed than necessary. The cutting line will cut efficiently when the engine is run at less than full throttle. At lower speeds, there is less engine noise and vibration. The cutting line will last longer and will be less likely to “weld” onto the spool.

Always release the throttle trigger and allow the engine to return to idle speed when not cutting. To stop engine:

SRelease the throttle trigger.

S Push and hold the STOP switch in the STOP position until the engine stops.

TRIMMER LINE ADVANCE

The trimmer line will advance approximately 2 inches (5 cm) each time the bottom of the trimmer head is tapped on the ground with the engine running at full throttle.

The most efficient line length is the maximum length allowed by the line limiter.Always keep the shield in place when the tool is being oper- ated.

To advance line:

SOperate the engine at full throttle.

SHold the trimmer head parallel to and above the grassy area.

STap the bottom of the trimmer head lightly on the ground one time. Approximately 2 inches (5 cm) of line will be advanced with each tap.

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Weed Eater 545186834, MX550 Starting a Warm Engine, Starting a Flooded Engine, Operating Position, Trimmer Line Advance
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545186834, MX550 specifications

The Weed Eater MX550, model number 545186834, is a powerful and efficient string trimmer designed for both residential and light commercial use. This reliable tool is engineered to provide excellent cutting performance, ease of use, and versatility, catering to various lawn care needs.

One of the standout features of the MX550 is its robust 25cc two-cycle engine. This powerful engine ensures optimal performance, allowing users to tackle tough grass, weeds, and overgrown areas with ease. The engine delivers impressive power while remaining lightweight, which minimizes operator fatigue during extended use.

The MX550 is equipped with a 16-inch cutting swath that efficiently covers large areas in a short amount of time, making it ideal for homeowners or landscapers with sizable properties. This wider cutting path allows users to reduce the time spent trimming, thereby increasing productivity. The tool is compatible with both regular trimmer line and heavy-duty line, catering to different cutting scenarios based on user preference.

Innovative technology is featured in the MX550 with its easy-to-load, bump-feed head. This design simplifies line replacement, allowing users to quickly and efficiently reload the trimmer line without the frustration often associated with traditional systems. The bump-feed function eliminates downtime, ensuring that the trimmer is always ready for action.

Moreover, the Weed Eater MX550 comes with adjustable handlebars, providing a comfortable grip for users of all heights. This ergonomic feature enhances control and maneuverability, making it easier to work in tight spaces or navigate around obstacles such as trees and flower beds.

This model also prioritizes user safety and convenience. It features a clear debris shield that protects the operator from debris while providing a clear view of the cutting area. The trimmer’s balanced design and lightweight frame reduce strain on the user, making it an ideal choice for extended periods of operation.

Additionally, the MX550 is designed for easy maintenance, with accessible components that allow for straightforward cleaning and servicing. This ensures the longevity of the trimmer, keeping it in peak operating condition for years to come.

In summary, the Weed Eater MX550, 545186834, combines power, versatility, and user-oriented design features to create an effective string trimmer for a range of trimming tasks. Whether you are a homeowner looking to maintain your lawn or a professional landscaper seeking reliable equipment, the MX550 stands out as a dependable choice in the vast market of outdoor power tools.
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