Shurflo O/B & I/O Cooling/Water Pumps

Shurflo Cooling & Water Pumps for Outboard and Inboard/Outboard Engines

When an engine overheats on the water, there's no pulling over to the side of the road — reliable cooling is absolutely mission-critical for any marine powerplant. Shurflo, a brand with roots dating back to 1968 and now part of the Pentair family, has built a well-earned reputation as one of the marine industry's most trusted names in fluid management. Their O/B & I/O Cooling/Water Pumps represent that same commitment to engineered reliability, built specifically to handle the punishing demands of outboard and inboard/outboard engine cooling circuits.

Engineering Built for the Marine Environment

What separates Shurflo's marine cooling and water pumps from generic alternatives is the attention paid to the specific challenges of saltwater and freshwater boating environments. Shurflo engineers their marine pumps using high-quality materials and advanced technologies that are engineered to withstand demanding conditions, including exposure to moisture, vibration, and the corrosive effects of marine atmospheres. Their designs incorporate thermal overload protection and, on select models, self-priming capabilities — features that translate directly to reduced downtime on the water.

For outboard (O/B) and inboard/outboard (I/O) applications, consistent raw-water or coolant circulation is what keeps cylinder temps in the safe zone. Shurflo's cooling water pumps are built to maintain steady flow even under heavy load, helping protect engine components from the kind of heat damage that leads to costly repairs or complete powerplant failure. Several Shurflo pump lines are designed to run dry without damage — a critical safety feature if a cooling circuit is momentarily starved of water during launch or in rough conditions.

Key Features of Shurflo O/B & I/O Cooling Pumps

• Thermal overload protection — guards the motor from heat-related failures during extended operation
• Self-priming capability — select models can self-prime up to 6 feet, simplifying installation and restart after maintenance
• Dry-run tolerance — pumps are engineered to run dry without incurring damage, a valuable trait in unpredictable marine scenarios
• Ignition protection — marine-specific safety compliance for use near fuel vapors in enclosed engine compartments
• Durable construction — built with sealed switches and e-coated motors on applicable lines to resist the corrosive marine environment
• Multi-voltage compatibility — available in 12V and 24V DC configurations to match a broad range of vessel electrical systems

Why Boaters Choose Shurflo for Cooling Applications

Shurflo has spent decades refining pump designs for the marine market, and that experience shows in the details. Every pump is tested before shipment to verify performance and quality. The result is a product line that recreational boaters, charter operators, and serious anglers alike depend on to keep their outboard and sterndrive powerplants running cool, trip after trip. Whether you're replacing a worn impeller-driven OEM unit or upgrading to a higher-flow cooling pump, Shurflo's O/B and I/O lineup offers proven solutions backed by a trusted global brand.

Browse the full selection of Shurflo cooling and water pumps for outboard and inboard/outboard engines to find the right fit for your engine model and application.