3

Maintaining

the

Engine

WARNING

DO NOT check for spark with spark plug removed. DO NOT crank engine with spark plug removed.

If the engine has been running, the muffler will be very hot. Be careful not to touch the muffler.

Spark Plug Service

WARNING: DO NOT check for spark with spark plug removed. DO NOT crank engine with spark plug removed.

WARNING: If the engine has been run- ning, the muffler will be very hot. Be careful not to touch the muffler.

To ensure proper engine operation, the spark plug must be properly gapped and free of deposits.

1.Remove the spark plug boot and use a spark plug wrench to remove the plug, Figure 3-2.

2.Visually inspect the spark plug. Discard the spark plug if there is apparent wear, or if the insulator is cracked or chipped. Clean the spark plug with a wire brush if it is to be reused.

3.Measure the plug gap with a feeler gauge. Correct as necessary by bending side electrode, Figure 3-3. The gap should be set to 0.02-0.03 inches (0.60- 0.80 mm).

4.Check that the spark plug washer is in good condi- tion and thread the spark plug in by hand to prevent cross-threading.

5.After the spark plug is seated, tighten with a spark plug wrench to compress the washer.

NOTE: When installing a new spark plug, tighten 1/2 turn after the spark plug seats to compress the washer. When reinstalling a used spark plug, tighten 1/8-1/4 turn after the spark plug seats to compress the washer.

IMPORTANT: The spark plug must be tightened securely. An loose spark plug can become very hot and can damage the engine.

Cleaning the Engine

If the engine has been running, allow it to cool for at least half an hour before cleaning. Periodically remove dirt build-up from engine.

IMPORTANT: Do not spray engine with water to clean because water could contaminate fuel. Using a garden hose or pressure washing equipment can also force water into the muffler opening. Water that passes through the muffler can enter the cylinder, causing damage.

WARNING: Accumulation of debris around muffler could cause a fire. Inspect and clean before every use.

Spark Plug

Spark Plug Boot

Figure 3-2: The spark plug and boot.

Electrode

0.02-0.03 in.

0.60-0.80 mm

Figure 3-3: Use a feeler gauge to measure the plug gap.

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MTD 208cc, 179cc manual Maintaining Engine, Spark Plug Service, Cleaning the Engine, Spark Plug Spark Plug Boot

179cc, 208cc specifications

MTD, a renowned name in outdoor power equipment, has made significant strides in the world of garden machinery with its 208cc and 179cc engines. These robust engines are designed to meet the varying needs of homeowners and professional landscapers alike, ensuring reliability and performance in both residential and commercial settings.

The MTD 208cc engine stands out with its powerful output, making it an excellent choice for larger mowing tasks and tougher terrain. This engine provides ample torque, allowing for efficient cutting through thick grass and uneven ground. It features a recoil start for quick and easy ignition, accompanied by a built-in primer bulb that ensures reliable starting under various conditions. With a lightweight design, the 208cc engine promotes maneuverability without compromising on power, making it ideal for riders and walk-behind mowers.

In contrast, the MTD 179cc engine is slightly smaller yet equally capable. Its compact design offers a great balance between power and fuel efficiency, making it suitable for smaller lawns and garden projects. The 179cc engine is particularly favored for its user-friendly nature, designed for easy handling and operation, which appeals to homeowners who may not have extensive gardening experience. Like the 208cc model, it also features a recoil start and primer bulb for convenience.

Both engines utilize advanced technologies such as a low-oil shutdown feature, which protects the engine from potential damage by turning it off if oil levels drop too low. This is coupled with an efficient air filtration system that ensures the engine runs smoothly and reduces the frequency of maintenance. These features not only enhance the longevity of the engines but also promote sustainable usage by minimizing emissions and fuel consumption.

The construction of both engines reflects MTD’s commitment to durability and performance. They are built with high-quality materials that withstand the rigors of outdoor use. Additionally, these engines are designed with vibration-dampening features to provide operators with a more comfortable experience while in use.

In summary, MTD's 208cc and 179cc engines combine power, efficiency, and reliability, making them popular choices for a variety of lawn and garden applications. With user-friendly features and robust construction, these engines exemplify MTD's dedication to crafting innovative outdoor solutions tailored to meet diverse customer needs. Whether tackling a sprawling yard or maintaining a small garden, MTD provides the right engine to get the job done effectively.