Stens 266-335 OEM Replacement Belt Compatible with/Replacement for Toro MX3450, MX4200, MX4250, SS3225, SS4200, SS4225, SWX4250, SW3200, SW4200, ZS3200S, ZS4200S and ZS4200T mowers 130-6975

What It Is

This Stens 266-335 is an aftermarket replacement drive belt designed for select Toro zero-turn mowers and wide-area walk-behinds. It transfers power from the engine to the cutting deck spindles, enabling blade rotation. It fits models like the Toro MX3450, MX4200, MX4250, SS3225, SS4200, SS4225, SWX4250, SW3200, SW4200, ZS3200S, ZS4200S, and ZS4200T.

Fitment & Compatibility

Before buying, verify your mower’s model number (not just brand) against the list above. Check your old belt’s part number—this replaces Toro OEM part 130-6975. Measure your existing belt: the Stens 266-335 is a 1/2-inch wide by 95.5-inch long (A-section) belt. If your deck is 42 to 48 inches (common on these models), it’s likely correct. Confirm your mower uses a single belt for the deck (not a separate engine drive belt). Avoid assuming fitment based on deck size alone—some Toro models with similar decks use different belt lengths.

Key Things to Buy

• Quality: Stens is a reputable aftermarket brand. This belt is aramid-reinforced for durability, comparable to OEM. Expect 200-400 hours of use under normal conditions.
• Installation Difficulty: Moderate. You’ll need to remove the deck or mower side panels, release belt tension (usually a spring-loaded idler pulley), and route the belt around spindles and pulleys. A belt diagram is helpful—take a photo before removal.
• Common Gotchas: Check all pulleys for wear or debris before installing. A worn pulley can shred a new belt quickly. Also, ensure the belt isn’t twisted after routing—double-check the pulley grooves. If your mower uses a separate deck lift system, verify the belt isn’t rubbing against any brackets.

Should You Buy It

Buy this if you own one of the listed Toro models and need a reliable, cost-effective replacement for a worn or broken deck belt. It’s a solid alternative to OEM at a lower price, with good durability for residential or light commercial use. If you have a different Toro model or need a belt for a different drive system (e.g., hydrostatic), skip it.