GC91820 Reel Lawn Mower Grass Catcher for 18-Inch and 20-Inch Lawn Mowers, 18-Inch/20-Inch Lawn Mower Bag for Push Reel Lawn Mower

What It Is

The GC91820 is an aftermarket grass catcher bag designed for 18-inch and 20-inch push reel lawn mowers. It attaches to the rear of the mower to collect clippings as you mow, intended for manual reel mowers without engine-powered discharge.

Fitment & Compatibility

• Deck size: Fits mowers with 18-inch or 20-inch reel cutting decks. Measure your mower’s deck width—if it’s not exactly 18 or 20 inches, this bag won’t fit.
• Brand/model: Most compatible with generic push reel mowers (e.g., American Lawn Mower, Great States, Scotts). Not for gas-powered or electric rotary mowers.
• OEM vs aftermarket: This is a universal aftermarket bag—no OEM-specific mounting brackets or adapters included. Check if your mower has a rear mounting bracket or hook system; many older reel mowers use a simple metal rod or two-pin attachment.
• Measurements: Bag dimensions are roughly 18” x 10” x 8”. Ensure your mower’s rear frame has clearance for the bag to hang without dragging on the ground.
• What to verify: Look for two small holes or slots on the mower’s rear frame (about 1/2 inch apart) for the bag’s mounting pins. If your mower has a different attachment system, this bag likely won’t work.

Key Things to Know

• Low build quality: Multiple reviews report thin fabric, poor stitching, and the bag tearing after a few uses—especially at stress points near the mounting pins.
• Installation is simple: No tools required; just slide the two metal pins into the mower’s rear frame holes. Takes under a minute.
• Fitment issues common: The bag’s mounting pins may not align with many reel mowers—check your mower’s rear bracket design before buying. Some users needed to drill new holes or add zip ties.
• Capacity is small: Holds about 1–2 bushels of clippings. For large lawns, you’ll empty it frequently, and the bag may sag or detach if overfilled.

Should You Buy It

Only if you have a 18- or 20-inch push reel mower with a compatible rear pin mounting system and you’re on a tight budget. Expect limited durability—this is a temporary or light-use solution. For frequent mowing or better reliability, invest in a sturdier OEM or branded bag ($30–$50).