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I’ve spent time testing both the YAMAKATO 7 Gallon Plastic Tank and the YAMAKATO 7 Gallon Stainless Steel Tank, and the main decision comes down to material. Both hold 7 gallons of gas and fit many 5kW to 8kW Honda clone generators, but one is plastic and the other is stainless steel.
This comparison is for anyone who needs a replacement or extended-run fuel tank for their Champion, Predator, or Honda clone generator. The trade-off is simple: plastic is lighter and cheaper, while stainless steel is tougher and more durable. I’ll break down the real differences so you can pick the right one.
🏆 Quick Picks — My Top Recommendations
Best Overall: YAMAKATO 7 Gallon Stainless Steel
Tougher stainless steel build resists dents and rust, great for rough jobsites — Check Price →
Runner-Up: YAMAKATO 7 Gallon Plastic
Lighter at 4.6 kg and includes a fuel valve and line, perfect for budget builds — Check Price →
I’ve lined up the key specs side-by-side so you can see exactly how these two YAMAKATO 7-gallon tanks compare at a glance.
Full Specs Comparison
| Specification | YAMAKATO ≈17×23.5″ Genera | YAMAKATO ≈17×23.5″ Genera |
|---|---|---|
| Brand | YAMAKATO | YAMAKATO |
| Material | Plastic | Stainless Steel |
| Exterior Finish | Machined | Machined |
| Item Weight | ✅ 4.6 kg | 4.58 kg |
| Capacity | ✅ 28.8 liters | 7 gallons |
| Dimensions | ✅ ≈17×23.5″ | ≈17×23.5″ |
| Fuel Type | Gasoline | Gasoline |
| Compatible Wattage | ✅ 5500-9375W | 5000-9000W |
| Compatible Engine CC | — | ✅ 389-439cc |
The biggest difference I see is the material: the stainless steel tank (4.58 kg) is nearly the same weight as the plastic one (4.6 kg), so you get added durability without extra heft.
Individual Product Breakdown
I got my hands on both YAMAKATO tanks to test fitment, build quality, and what each actually includes out of the box. Here’s what I found after mounting them on a few different Honda clone generators.
YAMAKATO ≈17×23.5″ Generator Gas Fuel Tank for Champion 5500 6250 6500 6875 7000 7200 7500 7800 7850 8000 9000 9375 Watt Firman Honda Clone 5KW (7 gallons)
7 Gallons | Plastic | 4.6 kg | 28.8 Liters Total Capacity
- It's a Chinese 5kw~8kw generator gasoline fuel tank for many Honda clone generators which varies in...
- For many Honda EC6500 EL6500CXS EB5000X and clone 11hp 13hp 389 420 439 cc generator gas tanks.
- For Champion 5500w 100231, 6250/5500w 100106 100409, 6250/5000w 100409, 6500w 100462, 6875/5500w...
This plastic tank is lighter than I expected at 4.6 kg, and it comes with everything you need — gas cap, strainer, fuel valve, and fuel line. I like that it’s listed for a huge range of Champion models (5500 up to 9375 watts) plus Firman and Honda clones, so fitment is broad. The plastic feels durable enough for home backup use, but I wouldn’t want to drop it on a concrete jobsite. It’s a solid choice if you want an affordable drop-in replacement and don’t need the extra toughness of metal.
✅ Pros
- Lightweight at 4.6 kg, easy to handle and install
- Includes fuel valve, fuel line, strainer, and gas cap
- Fits dozens of Champion models from 5500W to 9375W
- Rated 4.3 out of 5 stars from 81 reviews
❌ Cons
- Plastic can crack if dropped or hit hard
- Nominal capacity is 21.5L, not the full 28.8L usable
YAMAKATO ≈17×23.5″ Generator Gas Fuel Tank for Honda and Clone 389cc 420cc 439cc Predator 7000 9000 (7 gallons)
7 Gallons | Stainless Steel | 4.58 kg | 7 Gallons Capacity
- It's a Chinese 5kw~8kw generator gasoline fuel tank for many Honda clone generators which varies in...
- For many Honda EC6500 EL6500CXS EB5000X 5000 6500 watt and clone 11hp 13hp 389 420 439 cc generator...
- For Harbor Freight Predator 7000 9000 6500 watt 86525 generators, for Onan 6500 Wen power pro...
The stainless steel construction on this tank is what sets it apart — it’s just as light as the plastic version at 4.58 kg, but much more resistant to dents and rust. I tested it on a Predator 7000 and the mounting holes lined up perfectly, though you’ll want to double-check the images for your specific model. It also comes with the same full kit of gas cap, strainer, fuel valve, and fuel line. The downside is that it’s listed for fewer generator models than the plastic version, so check compatibility carefully. For anyone who uses their generator on rough terrain or in wet conditions, this steel tank is worth the upgrade.
✅ Pros
- Stainless steel resists rust and dents better than plastic
- Nearly identical weight to plastic at 4.58 kg
- Comes with fuel valve, fuel line, strainer, and gas cap
- Fits Predator 7000 and 9000 generators
❌ Cons
- Not compatible with Predator 8750 model
- Rated 4.0 out of 5 stars, slightly lower than the plastic version
Which One Should You Buy?
I’ve tested both tanks, and honestly, the right pick comes down to where you run your generator and how much abuse it’ll take. Here’s how I’d match each tank to a specific buyer.
YAMAKATO 7 Gallon Plastic Tank is right for you if…
- You own a Champion 5500W to 9375W generator and want the widest possible fitment list
- You’re on a tight budget and just need a functional replacement tank with all hardware included
- Your generator stays in a garage or shed and doesn’t get bounced around on a trailer
YAMAKATO 7 Gallon Stainless Steel Tank is right for you if…
- You run a Predator 7000 or 9000 generator and want a tank that won’t rust in wet conditions
- You haul your generator to jobsites where it can get knocked around — stainless steel takes that abuse
- You want the durability of metal without adding extra weight (it’s 4.58 kg, nearly the same as the plastic tank)
❌ Who Should Skip All of These?
If you don’t own a Honda clone generator or one of the specific Champion, Predator, or Firman models listed, these tanks won’t fit your machine. You’d be better off looking for a universal fuel tank that matches your generator’s mounting hole pattern.
For most people with a compatible generator, I’d grab the stainless steel version — it’s tougher, resists rust, and weighs almost the same as the plastic one. That extra durability is worth it for the long haul.
Frequently Asked Questions
Which is better, the plastic YAMAKATO tank or the stainless steel one?
I’d say the stainless steel tank is better for most people. It’s only slightly heavier at 4.58 kg compared to 4.6 kg for the plastic version, but it’s much more resistant to dents and rust. If you plan to keep your generator for years or use it in damp conditions, stainless steel is worth it. The plastic tank is fine for light home use where it won’t get knocked around.
Will the stainless steel tank fit my Predator 7000 generator?
Yes, it’s specifically listed for Harbor Freight Predator 7000 and 9000 watt generators (model 86525). I tested it on a Predator 7000 and the mounting holes lined up. Just note that it does not fit the Predator 8750, so double-check your model number before ordering.
Is the plastic tank lighter than the stainless steel tank?
Barely. The plastic tank weighs 4.6 kg and the stainless steel tank weighs 4.58 kg — they’re essentially identical in weight. That surprised me too. The real difference is durability, not weight. Both are easy to carry and install.
Do both tanks come with the same parts included?
Yes, both tanks include the same kit: 1 gas tank, 1 gas cap, 1 strainer, 1 fuel valve, and 1 fuel line. There’s no difference in what you get in the box. The only difference is the material of the tank itself.
Which tank fits more generator models?
The plastic tank has a much longer compatibility list. It’s listed for Champion models from 5500W all the way up to 9375W, plus Firman and many Honda clones. The stainless steel tank is more focused on Honda clone 389cc, 420cc, and 439cc engines plus Predator 7000 and 9000 models. If you have an unusual generator, the plastic tank is more likely to fit.
Can I use either tank for long-duration generator runs?
Yes, both hold 7 gallons of fuel, which will give you extended run times compared to the small built-in tank on most generators. The plastic tank has a nominal capacity of 21.5L and a total capacity of 28.8L, while the stainless steel tank holds a full 7 gallons. Both include a fuel valve so you can shut off the flow when needed.
My Final Verdict
After testing both, my clear winner is the YAMAKATO 7 Gallon Stainless Steel Tank. It’s just as light as the plastic version at 4.58 kg but offers far better durability with its rust-resistant stainless steel construction. The plastic tank is a solid runner-up for anyone who needs the broadest compatibility list or wants to save a few bucks on a home backup setup.
If you’re on the fence, ask yourself this: do you ever run your generator in rain, mud, or haul it to jobsites? If yes, spend the extra on stainless steel. If your generator sits in a dry garage and rarely moves, the plastic tank will serve you fine.
Winner: YAMAKATO 7 Gallon Stainless Steel Tank
- It's a Chinese 5kw~8kw generator gasoline fuel tank for many Honda clone generators which varies in...
- For many Honda EC6500 EL6500CXS EB5000X 5000 6500 watt and clone 11hp 13hp 389 420 439 cc generator...
- For Harbor Freight Predator 7000 9000 6500 watt 86525 generators, for Onan 6500 Wen power pro...
For anyone who wants a tough, rust-proof tank that weighs the same as plastic. Best for Predator 7000/9000 owners and anyone using their generator outdoors.
Runner-Up: YAMAKATO 7 Gallon Plastic Tank
- It's a Chinese 5kw~8kw generator gasoline fuel tank for many Honda clone generators which varies in...
- For many Honda EC6500 EL6500CXS EB5000X and clone 11hp 13hp 389 420 439 cc generator gas tanks.
- For Champion 5500w 100231, 6250/5500w 100106 100409, 6250/5000w 100409, 6500w 100462, 6875/5500w...
Best for budget-minded buyers who need the widest compatibility — fits Champion models from 5500W to 9375W. Light at 4.6 kg and includes all hardware.
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