Rotopax Rx-4g Gasoline Pack 4gal 36x14x4

What It Is

The Rotopax RX-4G is a 4-gallon, flat-pack gasoline container (36 x 14 x 4 inches) designed for secure transport and storage of fuel for lawn mowers, tractors, ATVs, and other small engines. It’s ideal for zero-turn mowers or large-area mowers that run out of fuel mid-job.

Fitment & Compatibility

• Mounting: Requires a Rotopax mounting plate or lock-and-ride system (sold separately) – not a direct bolt-on to any mower. Check your mower’s frame or rack for flat, open space at least 36" long and 14" wide.
• Fuel Type: Gasoline only – not for diesel, mixed fuel, or ethanol blends above E10 (check your mower manual).
• Mower Fit: No universal OEM fit – works best on commercial zero-turn mowers (e.g., Gravely, Scag, Toro) with a rear rack or flat deck area. Measure clearance for seat tilt or blade removal.
• Weight: 4 gallons = ~24 lbs full. Verify your mower’s weight capacity (often listed in manual) to avoid handling or balance issues.

Key Things to Know

• Installation difficulty: Moderate – requires drilling or mounting plate attachment (hardware not included). Expect 20–40 minutes.
• Quality: Heavy-duty, UV-stabilized HDPE; resists leaks and cracking. Spout is included but slow-flowing (no vent button).
• Common gotcha: The 36" length can interfere with mower deck removal or storage on compact tractors. Measure twice.
• Safety: CARB/EPA compliant; no spill-proof auto-shutoff – use the included vent cap to avoid vapor lock. Not for inverted transport.

Should You Buy It

Buy it if you run a commercial or large residential mowing operation and need to refuel mid-job without returning to a gas can. Skip it for compact push mowers or if you don’t already have a Rotopax mounting system – the extra cost and installation hassle aren’t worth it for occasional use.