Marine PumpsSales, Service & Repair

AC circulation pump sizing depends on your system's BTU capacity. For systems under 24,000 BTU, a small magnetic drive pump like the March MDX-3-5/8 or Little Giant 3-MD-SC works well. Systems from 24,000-72,000 BTU typically need a Scot 67/68 series or Oberdorfer 107M. Larger systems over 72,000 BTU require Scot 78 series or high-volume centrifugal pumps. ACCUMAR Marine provides free pump sizing consultations. Call 239-323-9600.

Scot pumps (by WILO) are the OEM standard on most Cruisair and Marine Air systems — the 67/68 series are the most common marine AC pumps in the industry. Oberdorfer's 107M series are designed as direct drop-in replacements for Scot 67/68 pumps with precision machined impellers for quieter operation. Both use bronze construction and carbon/ceramic mechanical seals. We stock both brands and can recommend the best option for your system.

Marine AC circulation pump replacement costs vary by brand and size. Pump selection and replacement timing depend on model, flow, pressure, voltage, connections, access, current stock, and approved scope. Call 239-323-9600 with the installed pump details.

The most common cause is a failing or undersized seawater circulation pump. Check for: reduced water flow from the overboard discharge, pump making unusual noise, impeller wear (rubber impellers should be replaced annually), clogged strainer basket, or a failed mechanical seal causing air leaks. Other causes include low refrigerant, dirty condenser, or thermostat issues. ACCUMAR Marine can diagnose and repair all marine AC system components.

Freshwater-pump selection depends on required flow, pressure, duty cycle, voltage, plumbing, available space, and service access. Jabsco Par-Max and SHURflo are common examples. ACCUMAR confirms equipment scope from the installed brand and model before recommending service or replacement.

Impeller inspection and replacement intervals depend on the pump model, material, duty, operating hours, water conditions, and manufacturer guidance. Dry running can damage some flexible-impeller pumps. ACCUMAR confirms the exact pump model and current supplier stock before recommending or supplying parts.

ABYC recommends minimum bilge pump capacity based on boat length: under 20ft needs 500-800 GPH, 20-30ft needs 1000-1500 GPH, 30-40ft needs 1500-2000 GPH, and 40ft+ needs 2000-4000 GPH. Always install both an automatic float-switch pump and a manual backup. Rule and Jabsco are the most popular bilge pump brands. We recommend Rule 2000 GPH automatic for most boats in the 25-40ft range.

Yes, we service and install diesel transfer pumps (Jabsco, Oberdorfer, Reverso), oil change systems (Reverso, Groco, Jabsco), and fuel polishing systems. Common services include pump rebuilds, impeller replacement, motor repair, and complete system installations. We also install Reverso GP-301 and GP-700 series oil change systems. Call 239-323-9600 for diesel and oil system service.