MTD 660 lawn tractor Parts

For your MTD lawn tractor model 660, the fastest way to find the correct replacement parts is to match the model number and your tractor’s serial number to the parts diagrams and parts list, then confirm the part number before ordering. Start with the 660 owner's manual to locate identification details and compatible accessories.

Step-by-step: find the right part for MTD 660

• Locate the model number (660) and the serial number on the tractor’s ID tag.
• Use the model number to pull up the correct parts diagrams and parts list for your exact tractor.
• Identify the part by diagram location and part description, then match the part number.
• If you are replacing a common wear item, verify deck size and configuration first (for example, 42-inch deck vs. other sizes).
• Order using the confirmed part number to avoid returns caused by look-alike parts.

Common MTD 660 parts customers replace

These are examples of parts available for this model that often come up during routine maintenance:

Part type	Example from this model’s parts list	When you typically replace it
Mower blade	Lawn mower blade 942-0616a	Dull, bent, or damaged blade; poor cut quality
Exhaust gasket	Gasket 692236	Exhaust leak noise, soot around muffler joint
Oil drain component	Oil drain cap 751-3142	Damaged cap/valve, oil seepage during service

Why it matters

Using the correct model-based diagram matters because riding mower parts (blades, pulleys, steering components, and deck hardware) can look similar but differ by deck width, mounting pattern, or engine configuration. Matching the model 660 listing helps ensure proper fit and safe operation.

Helpful tip for accessory compatibility

The operator’s manual notes that attachments and accessories are listed for lawn tractor models 660-668, and it also warns that the tractor is not designed for ground-engaging attachments (such as a tiller or plow). Checking the manual first helps you avoid buying an accessory that is not compatible with your tractor.

Last updated: February 2026

For an MTD lawn tractor like model 660, the most reliable way to identify the year is to use the model and serial number from the ID label and match that information to the production date details shown in your documentation. Start with the ID label location and recording steps in the owner's manual.

Find the ID label (model and serial)

On most MTD riding mowers and lawn tractors, the ID label is on the tractor frame and is easiest to read after cleaning it.

• Look under the seat area, on the rear frame, or along the frame rail near the engine
• Clean the label so every character is readable (dirt and sun fading are common)
• Write down the model number (660) and the entire serial number exactly
• Double-check confusing characters (0 vs O, 1 vs I, 5 vs S)

Use the serial number to determine the year

Once you have the full serial number, use the serial-number identification guidance in your documentation to determine the manufacturing date.

What you have	What it tells you	Why it helps
Model number (660)	The tractor series/configuration	Narrows the correct parts diagrams
Serial number	Production run and date coding	Identifies the build year
Engine model/type (if listed)	Engine family	Helps match engine-related service parts

Why it matters

MTD tractors can have running changes by production run (deck hardware, steering components, and engine exhaust parts). Knowing the build year helps us match the correct diagrams and order the right replacement parts, such as the gasket 692236 when servicing the exhaust system.

Last updated: February 2026

With normal residential use and routine maintenance, an MTD 660 lawn tractor typically lasts 10 to 15 years. Lifespan depends most on how consistently you service the engine, keep the deck clean, and replace wear items like blades, belts, and tires on schedule.

What most affects lifespan on an MTD 660

• Maintenance frequency: oil changes, air filter service, blade sharpening
• Operating conditions: dusty mowing, steep slopes, wet grass, heavy towing
• Storage: dry storage and battery care during the off-season
• Wear parts replacement: blades, belts, tires, deck wheels, seat
• Rust prevention: cleaning grass buildup and protecting bare metal

Maintenance milestones that extend service life

Use the intervals and procedures in the owner's manual as your baseline. These habits make the biggest difference:

• Change engine oil on schedule and keep oil at the correct level
• Keep the mower deck underside clean to prevent corrosion and poor cut quality
• Maintain tire pressure and check steering and brake feel regularly
• Recharge and store the battery properly during long storage periods
• Replace worn cutting parts before they damage spindles or the deck

Quick reference: what wears out first

Item	Typical replacement timing	Why it matters
Battery	3 to 5 years	Prevents no-start and charging issues
Blades	1 to 3 seasons	Protects spindles and improves cut
Belts	3 to 7 years	Restores drive and blade engagement
Tires	5 to 10 years	Improves traction and steering

Why it matters

A tractor can run for many years, but neglected wear parts often cause secondary damage (for example, a badly worn blade can increase vibration and shorten spindle bearing life). Replacing common items like the lawn mower blade 742-0616A on time helps protect higher-cost assemblies.

Last updated: March 2026