SENIX 21'' Self-Propelled Gas Lawn Mower (FWD), 170 cc 4-Cycle Engine 3.8 HP, 3-in-1 (Bagging/Mulching/Side Discharge), 6-Position Cutting Height Adjustment, 1.7 Bushels Grass Bag

What It Is

This is the OEM grass bag assembly for the SENIX 21’’ self-propelled gas lawn mower (model FWD, 170cc engine). It holds up to 1.7 bushels of clippings and is designed for bagging, mulching, or side-discharge use.

Fitment & Compatibility

• Exact fit: Only for SENIX 21’’ self-propelled mowers with a 170cc 4-cycle engine (FWD model). Not compatible with other brands or deck sizes.
• Check your model number: Look on the mower’s underside or near the engine for the exact model number (e.g., SENIX FWD-21 or similar). This bag is not universal.
• OEM vs aftermarket: This is the OEM part from SENIX. Aftermarket bags may fit, but they often have looser tolerances, weaker clips, or shorter lifespan. Stick with OEM for guaranteed fit.
• Measurements: Bag dimensions are roughly 22’’ wide x 12’’ deep x 10’’ tall. Confirm your mower’s bag attachment hooks and frame match this design before buying.

Key Things to Know

• Quality: Sturdy fabric and plastic frame, but the rear zipper can snag if overstuffed. Empty frequently to avoid tearing.
• Installation: Tool-free—slides onto the mower’s rear bracket and clips into place. Takes about 30 seconds.
• Common gotcha: The bag’s weight (approx. 3 lbs empty) can feel heavy when full. The 1.7-bushel capacity is small for large lawns (under ¼ acre). You’ll empty often.
• Durability: UV-resistant material holds up for 2-3 seasons with normal use. The plastic hook attachments are the first to break if you yank the bag off quickly.

Should You Buy It

If you already own this specific SENIX mower and need a direct, hassle-free replacement for a worn or missing bag, this is the right choice. Skip it if you have a different mower model or want a larger capacity—look for a universal bag or a mower upgrade instead.