OutdoorMaster Shark 2s Shark 3 Reviewed in 2025

Specs & Features

More Time Paddling, Less Time Struggling

The OutdoorMaster Shark 2s ($139.99) and Shark 3 ($179.99) are well-built rechargeable SUP pumps that feel substantial and durable—not cheap gear prone to breaking. Both feature three preset modes (SUP, Kite, Mattress) for different inflation needs.

Both pumps double as USB power banks for charging devices on the water, and include deflation capabilities standard on most quality pumps but still appreciated for quick packdown. Eight included nozzles ensure compatibility with virtually any inflatable.

The core difference lies in philosophy: The Shark 2s prioritizes endurance with its larger 88.8 Wh battery, inflating 4-5 large SUPs (375L) per charge at a steady 6-8 minutes each. The Shark 3 emphasizes speed with nearly twice the inflation rate (3-5 minutes per board) but carries a smaller 74 Wh battery good for 3-4 large boards per charge.

The Shark 3’s 45W USB-C PD fast-charging reaches full capacity in 2 hours versus 6 hours for the Shark 2s.

Choose the Shark 2s for remote paddling where charging opportunities are limited and battery life matters most. Choose the Shark 3 for quick turnarounds, multiple daily sessions, or when fast charging between sessions suits your routine. Both deliver reliable, hands-off inflation—set your pressure and let them work.

Battery Philosophy

The Shark 2s packs an 88.8 Wh battery—about 20% more than the Shark 3’s 74 Wh. This translates to up to 6 boards at 15 PSI per charge.

The Shark 3 compromises capacity for convenience. Its 45W USB-C PD charging reaches full capacity in 2 hours versus 6 hours for the Shark 2s.

The Shark 3 inflates up to 6 boards at 12 PSI per charge—slightly less pressure than the Shark 2s manages.

Both work very well as power banks, delivering 5 watts of power via USB ports. This is great for action cameras and smartphones.

Inflation Speed

The Shark 3 inflates nearly twice as fast as the Shark 2s. A 15 PSI board takes 3-5 minutes on the Shark 3 versus 6-8 minutes on the Shark 2s.

The Shark 3’s dual-stage system pushes 450 L/min in first stage, dropping to 120 L/min for final pressure. The Shark 2s maintains 350 L/min throughout.

For single board inflation, the difference is noticeable but not critical. For multiple boards, those saved minutes add up.

While previous OutdoorMaster pumps had deflate options, it’s still worth mentioning because it really helps when packing everything together.

Connectability

Both pumps work with standard 12V car outlets. A 12V cable is included. That includes the standard 12V outlets found on most boats off-grid and several portable power stations too.

The Shark 2s has a USB-C for charging itself (input) but uses a USB-A for charging other devices.

The Shark 3 has one USB-C for input and output.

Portability

Both weigh approximately 3 kg (6.6 lbs). The Shark 2s has a more compact shape with a hard handle.

The Shark 3’s profile makes it streamlined for a backpack. It also has suction cups on the bottom for more stationary use on a boat for example.

Testing Experience

We’ve had pumps fail after only a couple inflations. Usually it happens after using it one day without any issues, then trying to use it again a few days later only to find out it doesn’t work.

So, we used these two pumps on 4 separate days in different testing scenarios.

During testing from a boat, both pumps performed as expected. With the desired pressure set, connected to the SUP, and activated the way we usually inflate our SUPs and inflatable kayaks.

The automatic shut-off worked reliably on both models. The memory function recalled the last pressure setting the following session on a separate day.

Both pumps make a lot of noise, as all of these products tend to do, but the Shark 3 is slightly less loud. They didn’t overheat when running on battery power. When connected to land power, they got warmer.

Cooling and Runtime

We ran the Shark 3 continuously for 25 minutes without issues and it operates quieter than the Shark 2s.

The Shark 2s uses active cooling but OutdoorMaster doesn’t specify maximum runtime. In our testing, it handled 2-3 board sessions without overheating.

Real-World Battery Performance: ISLE Explorer Pro

Factory claims use smaller boards than many paddlers actually own.

Here’s how the numbers worked out during our testing with the popular ISLE Explorer Pro (330 L):

How many ISLE Explorer Pro (330 L) boards can each pump handle on its internal battery?

Both pumps can run indefinitely from a 12 V car socket once the battery is flat.

Explorer Pro spec: 330 L volume, recommended 15 PSI target.

Which Pump Should You Choose?

Shark 2s if you often inflate away from power and want the most boards per charge—even if each fill takes ~6–8 min. Four Explorer Pros on one charge is realistic.

Shark 3 if speed and 45 W USB-C fast-charging matter more than endurance. You’ll cut fill time to ~4½ min but should budget for three, maybe four, Explorer Pros per charge.

Either way, keep in mind that very hot sand, cool lake mornings, or a stiff hose connection all nudge the numbers down slightly, so leave yourself a margin if you’re paddling with friends.

The Verdict

Choose the Shark 2s for longer battery life and better value. Choose the Shark 3 for faster inflation and quick charging.

The Shark 2s suits remote paddling where charging opportunities are limited. The Shark 3 works better for quick turnarounds and multiple daily sessions.

Both pumps include 8 nozzles, memory functions, and USB power bank capabilities. Either will handle standard SUP inflation needs reliably.

Bottom Line: Shark 2s for endurance and value, Shark 3 for speed and convenience.