Toro Part #161-8188 Grass Bag for 30 Inch Timemaster Mowers (Replaces 121-5770)

What It Is

This is the OEM replacement grass bag for Toro 30-inch TimeMaster mowers (models 20199, 20330, 20331, 20333, and 20334). It captures clippings during bagging operation and replaces the older part number 121-5770.

Fitment & Compatibility

Before buying, confirm your mower is a 30-inch TimeMaster with a stamped steel deck (not the 30-inch Super Recycler or any 22-inch model). Check your mower’s model number on the serial tag under the seat or on the frame. This bag only fits the 30-inch TimeMaster bagging system—it will not attach to other Toro mowers or aftermarket frames. The bag measures approximately 28” long x 12” wide x 11” tall. If you have an older TimeMaster that originally used part 121-5770, this bag is the direct replacement (same hooks, same frame attachment).

Key Things to Know

• Quality: Heavy-duty woven polypropylene with reinforced stitching. Holds up well to regular use, but avoid dragging it on concrete to prevent premature wear.
• Installation: Attaches to the existing bag frame with two molded hooks. No tools needed—just line up the hooks and press down until they click. Takes about 30 seconds.
• Common gotcha: The bag’s top opening has a rigid plastic lip that can crack if you overfill or force it onto the frame. Empty the bag when it’s about ¾ full to prevent stress.
• No adapter needed: This bag uses the same frame and mounting system as the original. If your frame is damaged, you’ll need to replace it separately (Toro part 131-6734).

Should You Buy It

Buy this if you need a direct OEM replacement for a worn or torn bag on your 30-inch TimeMaster and want guaranteed fit and durability. It’s the right choice for maintaining original performance and avoiding aftermarket fit issues. Skip it if your bag frame is bent or broken—you’ll need to replace the frame first.