Adventure Kings 3500iO vs Yamaha EF3000iSE Inverter Generators

Adventure Kings 3500iO

Lighter weight

Higher rated output

Lower cost

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Yamaha EF3000iSE

Longer runtime

Quieter operation

Increased mobility due to wheels

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Every now and again you might need a hefty power boost, whether due to blackouts at home, heavy-duty tasks in your workshop, powering a bustling food truck, or providing energy solutions for outdoor events. Large portable generators assure you of reliable, consistent power. However, choosing the best for your needs can pose serious challenges. Questions about the right sizing, noise levels, and cost-efficiency demand careful consideration.

That’s why we’re today comparing two models: the Adventure Kings 3500iO and the Yamaha EF3000iSE. The goal? To help you compare their performance and specs to understand what each can do for you.

Performance & Power

Running Power (W): Adventure Kings 3500iO (3000W) vs Yamaha EF3000iSE (3000W)
Running power is the amount of continuous power a generator can provide. Both these models offer a running power of 3000W, which is enough to power large electric appliances such as water heaters or industrial vacuum cleaners.

Starting Power (W): Adventure Kings 3500iO (3300W) vs Yamaha EF3000iSE (4000W)
Starting power is important for devices that require a high initial burst of power upon startup. The Yamaha EF3000iSE has a higher starting wattage (4000W), giving it an advantage when powering devices with high start-up loads over the Adventure Kings model (3300W).

Engine type: Adventure Kings 3500iO uses a 208cc OHV engine, while the Yamaha EF3000iSE runs on a more compact 171cc OHV engine. OHV engines are typically more fuel-efficient and durable, making them ideal for generators.

Rated Output (kVA): Adventure Kings 3500iO (3kVA) vs Yamaha EF3000iSE (2.8kVA)
Rated output measures a generator’s apparent power. The Adventure Kings 3500iO edges out the Yamaha EF3000iSE slightly with its higher apparent power rating of 3kVA.

Inverter: Both the Adventure Kings 3500iO and Yamaha EF3000iSE offer inverter technology, for cleaner, smoother power that’s highly suitable for sensitive electronics like laptops. This means they’re likely quieter and more fuel-efficient than non-inverter models.

Fuel & Run Time

Fuel Type: Both the Adventure Kings 3500iO and Yamaha EF3000iSE run on petrol.

Fuel Tank Capacity: Adventure Kings 3500iO (12L) vs Yamaha EF3000iSE (13L)
The Yamaha model sports a slightly larger fuel tank, which could mean fewer refills but also added weight and size to your generator.

Run Time: Adventure Kings 3500iO runs for approximately 5.5 hours at full load, while the Yamaha EF3000iSE offers an impressive runtime of up to 20.5 hours at quarter load. Bear in mind how long you’ll need your generator to run when considering these models.

Physical Specs

Dry Weight: Adventure Kings 3500iO(30.5kg) vs Yamaha EF3000iSE(67kg)
The weight of a unit can affect both handling and portability. While the Adventure Kings is quite light, the Yamaha provides greater fuel capacity and longer runtime – features which may contribute to its increased weight.

Size: The Adventure Kings 3500iO sits snugly within a 50cm cube-ish frame, while the more hefty Yamaha EF3000iSE is noticeably larger at 68cm long, 44.5cm wide and 55.5cm high. Your storage space could influence your decision between these two models.

Wheels: Unlike the Adventure Kings model, the Yamaha EF3000iSE does feature transport wheels which can make moving its larger frame more manageable.

Outlets & Parallel Use

AC Outlets: Both the Adventure Kings 3500iO and Yamaha EF3000iSE possess two AC outlets for your generic power needs.

DC Outlets: The Adventure Kings model doesn’t offer any DC ports, whereas the Yamaha EF3000iSE provides one DC outlet, useful for charging devices like phones and laptops.

Parallel Use: Neither of these generators supports parallel usage – keep this in mind if you plan to power big loads requiring multiple generator units.

Features & Usability

The Adventure Kings 3500iO is equipped with a recoil start system and an overload protection safety feature. On the other hand, the Yamaha EF3000iSE provides both a recoil and an electric starter system, as well as a fuel gauge, oil alert system, brushless alternator, and a spark arrestor for safety.

Noise Level

Operating at 66dBA at idle to 74dbA at a 2KW load, the Adventure Kings 3500iO is noticeably louder than the significantly quieter Yamaha EF3000iSE which runs at just 51dBA – quieter than many household appliances!

Adventure Kings 3500iO vs Yamaha EF3000iSE Comparison Table

FeatureAdventure Kings 3500iOYamaha EF3000iSE
Warranty2 Years4 Years
Engine Type208 cc, 4-stroke, OHV171 cc, OHV, 4-stroke
Air CooledYY
Running watts3000 W3000 W
Max / Starting watts3300 W4000 W
Voltage (AC)240 V230 V
DC OutputNot specified12V / 8A
AC Frequency (Hz)5050
Rated Output (kVA)32.8
Fuel Tank Capacity12 L13 L
Run time (Hours)5.5 (100% Load)20.5 at 1/4 load
Dry Weight (Kg)30.567
Size (L x W x H)50 x 48 x 50 cm68.0 x 44.5 x 55.5 cm
Number of AC Outlets22
DC OutletsNone1x 12V
Parallel useNN
Starter SystemRecoilRecoil/Electric
Fuel gaugeNot specifiedY
Oil alertNot specifiedY
Noise Level (dBA)66 (at idle), 74 (2KW load)51


With many shared features like inverter technology and dual AC outlets, both generators have their unique advantages. The Adventure Kings 3500iO’s lighter weight and slightly higher rated output make it appealing – but if long runtime and low noise are high on your list of priorities, you might find more value in the Yamaha EF3000iSE which offers greater fuel efficiency, built-in wheels for mobility and a quieter operation.