MTD Yard Machines 650 Series

Questions and Answers

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Cristian BrownAug 11, 2025
How to fix MTD Yard Machines 650 Blower engine that fails to start?
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  Scott OneillAug 12, 2025
  If your MTD Blower's engine won't start, several factors could be at play. First, ensure the spark plug wire is securely connected to the spark plug. Next, check the fuel tank; it may be empty or contain stale fuel—refill it with clean, fresh gasoline. If your model has a throttle control lever, make sure it's in the correct starting position. A blocked fuel line could also be the culprit, so try cleaning it. Inspect the spark plug for faults and clean, adjust the gap, or replace it if necessary. Lastly, if the engine is flooded, wait a few minutes before attempting to restart it, and avoid priming it this time.
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laura31Aug 19, 2025
Why does my MTD Blower engine run erratic?
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  Andrew CarrilloAug 19, 2025
  If your MTD Blower engine runs erratically, start by checking the spark plug wire to ensure it's connected and tightened properly. A blocked fuel line or stale fuel could also be the issue; clean the fuel line and refill the tank with fresh gasoline. Make sure the vent in the gas cap isn't plugged—clear it if necessary. Additionally, check for water or dirt in the fuel system by draining the fuel tank and refilling it with fresh fuel. If the air cleaner is dirty, replace it. If none of these steps resolve the issue, the carburetor might be out of adjustment, and you should consult an authorized service dealer.
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Lisa HernandezAug 27, 2025
Why MTD Yard Machines 650 idles poorly?
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  Frank SmithAug 27, 2025
  If your MTD Blower idles poorly, several issues could be the cause. Start by inspecting the spark plug—it may be fouled, faulty, or have a gap that's too wide. Reset the gap to .030” or replace the spark plug. Also, a dirty air cleaner can contribute to poor idling, so replace it if necessary. If these steps don't resolve the problem, the carburetor might be improperly adjusted, and you should consult an authorized service dealer.
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Sierra ClarkSep 2, 2025
What to do if MTD Yard Machines 650 Blower engine overheats?
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  pamelamoyerSep 2, 2025
  If your MTD Blower engine overheats, the first thing to check is the engine oil level. Make sure to fill the crankcase with the proper oil. A dirty air cleaner can also cause overheating, so replace it if necessary. Lastly, check for any restrictions in air flow. If airflow is restricted, remove the blower housing and clean it.

This document is an operator's manual for a Yard Machines Leaf Blower, Model Series 650, manufactured by MTD Products Inc. It provides comprehensive instructions for assembly, operation, maintenance, and troubleshooting, emphasizing safe practices throughout.

Function Description

The Yard Machines Leaf Blower, Model Series 650, is a powerful, walk-behind outdoor power equipment designed primarily for blowing leaves and other light debris. It utilizes an internal combustion engine to generate a high-velocity air stream, allowing users to efficiently clear lawns, driveways, and other surfaces. The unit is designed for ease of use with features like height adjustment and a two-way discharge system, enabling the operator to direct the airflow either to the front or to the side of the unit.

Important Technical Specifications

While specific engine details (e.g., horsepower, displacement) are referred to in a separate engine manual, the leaf blower itself features a robust design. Key components include a blower housing assembly, an impeller (referred to as "revolving blades"), and a directional discharge chute. The unit is equipped with rear wheels (12x3) and swivel caster wheels (5" Dia x 1.25) for maneuverability. The handle system consists of an upper and lower handle, secured with curved head bolts, saddle washers, and handle knobs. The height adjustment crank allows for varying discharge chute heights. The manual highlights the importance of using SAE 30 oil for wheel lubrication and specifies a spark plug gap of .030". The fuel system requires gasoline, and the engine's exhaust system may require a spark arrester, especially in areas with specific regulations like California.

Usage Features

The leaf blower is designed for straightforward operation. Before starting, users must service the engine with gasoline and oil as per the separate engine manual. The starting procedure involves attaching the spark plug wire, moving the choke lever to the "CHOKE" position (for cold engines), setting the throttle control to "FAST," and then pulling the starter rope with a rapid, continuous, full arm stroke. Once the engine starts, the choke control is gradually moved to the "RUN" position. To stop the engine, the throttle control lever is moved to the "OFF" position. A key usage feature is the two-way discharge system, which can be adjusted by pushing down on the handle and swinging a door to direct the airflow either to the side or to the front. The height adjustment crank on the right-hand side allows operators to raise or lower the discharge chute, adapting to different terrain or debris conditions. The manual strongly advises against operating the unit without the directional discharge chute and plastic impeller guard properly affixed, as these are crucial for operator safety.

Maintenance Features

Regular maintenance is crucial for the leaf blower's performance and longevity. The manual outlines several key maintenance tasks:

Lubrication: Rear wheels should be lubricated once a season with a few drops of SAE 30 oil. Engine lubrication instructions are detailed in the separate engine manual.
Engine Maintenance: This includes maintaining engine oil levels, servicing the air cleaner every 25 hours (or more frequently under dusty conditions), and cleaning the spark plug and resetting its gap annually (or replacing it at the start of each mowing season).
Cleaning: The engine and cooling system (blower housing area) should be cleaned regularly with a cloth or brush to ensure proper air circulation and prevent the buildup of grass, dirt, and combustible debris around the muffler.
Fasteners: All nuts, bolts, and screws must be kept tight to ensure the equipment remains in safe working condition.
Safety Devices: Safety devices should never be tampered with and their proper operation should be checked regularly.
Storage: Before storing, the equipment should be thoroughly cleaned and wiped with an oiled rag to prevent rust. Engine storage instructions are in the separate engine manual. For compact storage, the upper handle can be folded toward the engine. The unit should be stored in a clean, dry area, away from corrosive materials and any open flames, sparks, or pilot lights (e.g., water heaters, furnaces).

The manual also includes a troubleshooting guide for common issues like the engine failing to start, running erratically, overheating, or idling poorly, providing potential causes and remedies. For repairs beyond minor adjustments, users are advised to contact an authorized service dealer. The document emphasizes safety with warnings about rotating blades, engine exhaust, and the handling of gasoline, stressing the importance of wearing safety glasses during operation and maintenance.