Attwood Sahara MK2 Automatic Bilge Pump - Easy Install, Anti Air-Lock

Our review of the Attwood Sahara MK2 Automatic Bilge Pump finds it best suited for boat owners who want a straightforward, low-hassle bilge solution that resists air-locks. The Sahara MK2 stands out for one clear reason: its patented X-Air Impeller that ejects trapped air, which makes pump starts more reliable in both fresh and saltwater. Installation is simple and service access is well thought out, so the pump is especially attractive to owners who do maintenance themselves or those replacing older top-mounted bilge pumps.

Key Features

• 800 GPH flow: Provides solid pumping capacity for small to medium boats, giving confidence that typical bilge water will be removed quickly.
• X-Air Impeller: Ejects trapped air from the pump and pipework so the unit avoids common air-lock failures and starts reliably.
• Flexible 90 rotatable outlet: Allows full 360 orientation so the pump can be installed in tight or awkward locations without rerouting hose work.
• Single-hand cartridge release: Lets you remove the cartridge without disconnecting pipe or hose, speeding maintenance in cramped bilges.
• SteadySwitch buoyancy control: Reduces excessive cycling so the pump drains the bilge rather than the battery, improving efficiency.
• Universal mounting pattern: The 7-hole pattern helps replace many top bilge pumps without structural changes to the boat.

Who It's For

Boat owners with small to medium craft who value easy installation and serviceability will appreciate this pump, particularly those replacing older top-mounted units. The long wire and rotatable outlet make positioning under engines or in cramped compartments straightforward, and the anti-air-lock design is useful where suction lines or through-hull runoff can trap air.

Those needing extremely high flow rates for commercial dewatering, or who prioritize long-term durability above initial service convenience, should compare heavier-duty alternatives. Also, if you require a pump with significantly longer warranty or proven longevity in heavy continuous use, consider a model rated for continuous commercial duty.

Pros & Cons

Pros

• Easy to install and service thanks to the single-hand cartridge release and rotatable outlet.
• Reliable starts in mixed environments because the X-Air Impeller clears trapped air.
• Good efficiency for battery life due to SteadySwitch buoyancy control reducing cycling.
• Universal backwards compatible mounting simplifies replacements.

Cons

• Some customers reported durability issues with the motor not running long term; longevity can vary by use and installation conditions.
• At 800 GPH it may be undersized for large boats with heavy inflow needs.

Specifications

Part number	PN 5508-7
Flow rate	800 GPH
Voltage	12V
Fuse size	4A
Outlet type	3/4' & 1' barbs
Check valve	Included
Wire length	29 1/2'

Our Verdict

The Attwood Sahara MK2 is a well thought out automatic bilge pump that offers real user-friendly advantages: anti-air-lock operation, simple maintenance, and flexible installation. For recreational boaters replacing a top-mounted pump or installing a reliable 12V unit for routine bilge work, it represents good value. Buyers needing very high continuous duty should compare heavier commercial models.

Frequently Asked Questions

Does the pump include a check valve?
Yes, the Sahara MK2 includes a check valve with the straight outlet to prevent backflow.

What outlet sizes does it accept?
It accepts 3/4' and 1' barb fittings and the rotatable 90 elbow helps align plumbing without extra hose bending.

How does it avoid air-locks?
The patented X-Air Impeller ejects trapped air from the pump and connected pipework so the unit can restart reliably after air has entered the system.