attwood 8803LP2 EPA and CARB Certified 3-Gallon Portable Mar
✅ PROS
- Leak-proof valve and gasket design holds up against fuel expansion without weeping
- Fits standard 1/4-inch fuel lines on most outboards up to 15hp without adapters
- Rigid HDPE shell resists dents and UV damage better than cheaper blow-molded tanks
❌ CONS
- No fuel gauge — you'll be guessing with a dipstick or shake test
- Cap threads are shallow; cross-threading is easy if you rush reattachment
The Verdict
The Attwood 8803LP2 is the quiet workhorse of portable marine fuel tanks — but it’s not without quirks. With 215 Amazon ratings holding at 4.3 stars, this 3-gallon jug has earned its reputation among small-boat owners. I’ve spent time with the specs and buyer feedback to give you the straight story before you drop cash on a new fuel tank.
What’s Actually in the Box
You get the tank itself — a 3-gallon (11.4-liter) HDPE container in that unmistakable marine red — plus the cap assembly with an integrated fuel pickup, a vent screw, and a 1/4-inch NPT outlet fitting. No fuel line is included, which trips up some first-time buyers. You’ll need to supply your own hose, typically 3/8-inch inner diameter for most outboard applications. The tank measures roughly 14 inches long by 10 inches wide by 8 inches tall, so it slides under a bench seat or into a small stern locker without drama.
Build Quality and Real-World Performance
The tank is EPA and CARB certified, which means it meets strict evaporative emission standards — a non-negotiable if you boat in California or any state with aggressive air quality rules. The HDPE construction is noticeably stiffer than budget tanks; it doesn’t flex or bulge when fuel warms up on a hot dock. The cap seals via a threaded collar with a rubber gasket, and once you crank it down, it holds pressure without seeping. One buyer noted: “Left it in the truck bed for two weeks in July heat — no fuel smell, no expansion warping. My old Tempo tank leaked like a sieve by comparison.”
The integrated fuel pickup tube reaches the bottom of the tank, so you can run it nearly dry without starving your motor. That’s a small thing until you’re trolling for hours and don’t want to haul a 6-gallon spare.
Where It Falls Short
The most common complaint in the review threads is the lack of a fuel gauge. For a tank this size, you’d think a simple float would be standard. Instead, you’re checking by lifting the tank or using a dipstick — annoying mid-day on the water. Second, the cap threads are shallow and can cross-thread if you’re not careful. One reviewer wrote: “Rushed to refill at the ramp, cross-threaded the cap, and spent 20 minutes fighting it loose. Take your time screwing it on.”
Also, the vent screw is small and easy to lose. If you drop it overboard, you’re looking at finding a replacement M6 screw — not a dealer shelf item everywhere.
Who Should Buy This
Buy it if: You run a small outboard (up to 15hp) on a dinghy, kayak, jon boat, or small skiff. You want a compliant, leak-resistant tank that won’t off-gas fumes into your garage or boat locker. You appreciate a tank that’s built to survive years of sun and salt.
Skip it if: You need a fuel gauge or want a tank with a quick-disconnect fitting included. If you’re running a larger motor (25hp+), step up to a 6-gallon model — this will empty too fast.
FAQ
Q: Does this tank fit my 9.9hp Yamaha outboard? A: Yes, if you use a standard 1/4-inch fuel line with the correct primer bulb. The outlet is a 1/4-inch NPT thread; most outboards use this connection. Verify your motor’s hose fitting before ordering.
Q: Can I store this tank in my garage? A: Yes, the EPA/CARB certification means it’s designed to contain evaporative emissions. Keep the vent closed when not in use, and store away from direct heat sources.
Q: How long will the cap seal last? A: The gasket is replaceable, and with normal use (not over-torquing), expect 2-3 seasons before you notice any stiffness. Replace it proactively if you see cracks.
The Verdict
Rating: 4.2/5 — At its price point, the Attwood 8803LP2 delivers dependable fuel storage with zero leaks and solid compliance credentials. The missing gauge and fiddly cap are real annoyances, but they don’t compromise the core job: getting fuel to your motor safely. For the weekend angler or tender boat owner, this is a smart buy. For anyone wanting a gauge or a tool-free hose connection, look elsewhere.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.