Troubleshooting, Problem Cause

SECTION 7: TROUBLESHOOTING

Problem		Cause

Engine fails to start	1.	Blade control handle disengaged.	1.	Engage blade control handle.
	2.	Spark plug wire disconnected.	2.	Connect wire to spark plug.
	3.	Fuel tank empty or stale fuel.	3.	Fill tank with clean, fresh gasoline.
	4.	Blocked fuel line.	4.	Clean fuel line.
	5.	Faulty spark plug.	5.	Clean, adjust gap, or replace.
	6.	Engine flooded	6.	Wait a few minutes to restart, but do not
				prime.
Engine runs erratic	1.	Spark plug wire loose.	1.	Connect and tighten spark plug wire.
	2.	Blocked fuel line or stale fuel.	2.	Clean fuel line; fill tank with clean, fresh
				gasoline
	3.	Vent in gas plugged.	3.	Clear vent.
	4.	Water or dirt in fuel system.	4.	Drain fuel tank. Refill with fresh fuel.
	5.	Dirty air cleaner.	5.	Refer to engine manual.
	6.	Carburetor out of adjustment.	6.	Refer to engine manual.
Engine overheats	1.	Engine oil level low.	1.	Fill crankcase with proper oil.
	2.	Air flow restricted.	2.	Remove blower housing and clean.
	3.	Carburetor not adjusted properly.	3.	Refer to engine manual.
Occasional skip (hesitates)	1.	Spark plug gap too close.	1.	Adjust gap to .030”.
at high speed
Idles poorly	1.	Spark plug fouled, faulty or gap too	1.	Reset gap to .030” or replace spark
		wide.		plug.
	2.	Carburetor improperly adjusted.	2.	Refer to engine manual.
	3.	Dirty air cleaner.	3.	Refer to engine manual.
Excessive vibration	1.	Cutting blade loose or unbalanced.	1.	Tighten blade and adapter. Balance
				blade.
	2.	Bent cutting blade.	2.	Replace blade.
Mower will not mulch grass	1.	Wet grass.	1.	Do not mow when grass is wet; wait
				until later to cut.
	2.	Excessively high grass.	2.	Mow once at a high cutting height, then
				mow again at desired height or make a
				narrower cutting path.
	3.	Dull blade.	3.	Sharpen or replace blade.
Uneven cut	1.	Wheels not positioned correctly.	1.	Place all four wheels in same height
				position.
	2.	Dull blade.	2.	Sharpen or replace blade.

NOTE: For repairs beyond the minor adjustments listed above, contact an authorized service dealer.

503 specifications

The MTD 503 is a versatile and innovative piece of machinery designed for a variety of agricultural and gardening applications. Known for its durability and efficiency, the MTD 503 has become a favorite among both professional landscapers and home users. This powerful equipment boasts numerous features and technologies that enhance its performance and user experience.

One of the standout characteristics of the MTD 503 is its robust engine, which typically comes in a 4-stroke configuration. This design not only ensures superior power output but also contributes to lower emissions and reduced fuel consumption. The engine is paired with an ergonomic design that allows for easy handling and maneuverability, making it suitable for different types of terrain.

The MTD 503 is equipped with a wide cutting deck that allows for efficient grass cutting, while its adjustable height settings cater to various lawn types and preferences. Users can effortlessly switch between different cutting heights, ensuring precision and an aesthetically pleasing lawn finish. Additionally, the model often features a mulching function, enabling the user to recycle grass clippings back into the lawn, promoting a healthier green space.

In terms of technology, the MTD 503 is designed with user-friendly controls that enhance the operational experience. The intuitive dashboard provides easy access to all essential functions, allowing users to operate the machine with minimal complexity. Safety features, such as automatic shut-off systems and easy-to-reach emergency stops, are integrated into the design, ensuring that user safety is prioritized at all times.

Durability is another key characteristic of the MTD 503. Built with high-quality materials, it withstands harsh conditions and requires minimal maintenance, offering long-term reliability. The wheels are constructed for superior traction and stability, making it well-suited for various landscaping tasks, from mowing to hauling equipment.

In conclusion, the MTD 503 stands out in the realm of gardening and landscaping equipment due to its powerful engine, thoughtful design, and advanced technology. Its multiple features make it a practical choice for users seeking efficiency and ease of use in their gardening endeavors. Whether tending to residential lawns or managing larger landscapes, the MTD 503 is equipped to deliver exceptional results time and again.