Attwood Replacement Cartridge f/Tsunami 1200 MK2

The Attwood Replacement Cartridge for Tsunami 1200 MK2 is a direct-fit motor cartridge designed for the Attwood Tsunami MK2 (56 series) bilge and aerator pump lineup. This replacement cartridge delivers 1200 GPH of pumping capacity and is engineered to eliminate air locks that can compromise bilge or live-well performance during critical moments on the water. For boat owners relying on dependable water management systems, this OEM-spec component ensures your pump operates at design capacity without the operational delays that air entrapment creates.

The 1200 GPH rating represents the throughput standard for the 56 series motor family, making this cartridge a verified upgrade path when existing Tsunami 1200 MK2 units require reconditioning. The air-lock elimination design is the key operational advantage—bilge systems that fail to purge air tend to lose prime, reducing effectiveness precisely when water ingress accelerates. The compact cartridge dimensions (3 x 3 x 5 inches) fit within the standard Tsunami pump housing, confirming compatibility across the MK2 generation without requiring enclosure modifications. At 0.8 pounds, the cartridge handles replacement installation with minimal deck complexity.

This cartridge is essential for weekend anglers who run smaller fishing vessels and commercial operators managing larger boats where reliable bilge management is non-negotiable. Weekend fishermen benefit from quick restoration of failed or aging pumps without replacing the entire pump assembly. Serious offshore anglers and charter operators depend on Tsunami 1200 systems for redundancy—keeping replacement cartridges on hand ensures minimal downtime if a unit begins cavitating. Aerator applications in live-well systems also rely on consistent cartridge performance to maintain oxygen saturation during long runs to productive grounds.

Attwood Marine has built its reputation on marine electrical components that tolerate salt-air environments and constant duty cycles. The Tsunami 1200 line represents their mid-range bilge offering, widely found in recreational and commercial small craft. Choosing an OEM cartridge (part number 5624-6) versus aftermarket alternatives preserves the engineering tolerances that prevent air introduction and maintains warranty coverage on the original pump housing and intake pathways.