Scepter 10511 Under Seat Portable Fuel Tank - 6 Gallon

What It Is

The Scepter 10511 is a portable 6-gallon fuel tank designed to sit under the seat of a riding lawn mower or tractor, replacing or supplementing the factory fuel system for extended run times.

Fitment & Compatibility

• Measurement check: The tank is 20.3" L x 11.8" W x 9.1" H. Measure your mower’s under-seat clearance and mounting area before purchase—many zero-turn and garden tractors fit, but compact models may not.
• Brand/model fit: Commonly used on John Deere, Cub Cadet, Husqvarna, and Craftsman models with a flat or slightly contoured seat deck. Verify that your mower’s seat bracket or frame doesn’t block the tank shape.
• OEM vs aftermarket: This is an aftermarket part, not a direct OEM replacement for any specific brand. It includes a fuel cap, shut-off valve, and pick-up tube but no mounting hardware—you’ll need to secure it with straps or brackets.
• Fuel line compatibility: The tank has a 1/4" NPT outlet. Check your mower’s fuel line size and whether you need an adapter or hose clamp to connect.

Key Things to Know

• Installation difficulty: Moderate. You’ll need to drill or use existing holes for mounting, plus run a fuel line and possibly a shut-off valve. Not a simple “drop-in” for most mowers.
• Quality notes: Made from HDPE plastic—durable but can warp slightly in extreme heat. The cap seal is reliable, but some users report slow fuel flow if the vent is not fully opened.
• Common gotchas: The tank is tall enough to hit the seat bottom on some mowers with low clearance. Also, the pick-up tube sits near the bottom, so you may leave about 0.5–1 gallon unusable unless you tilt the mower.
• Fuel type: Works with gasoline and diesel blends up to 10% ethanol. Not compatible with E15 or higher.

Should You Buy It

Buy this if you need a budget-friendly, portable fuel tank for a large riding mower or tractor and don’t mind a moderately involved installation. It’s ideal for extended mowing sessions without refueling, but skip it if you want a direct OEM fit or have a compact mower with tight under-seat space.