Marine Generator Sales, Repair & Rebuild

Generator sizing depends on your total electrical load. For boats under 30 feet with basic AC and appliances, a 4-6 kW generator is typically sufficient. Boats 30-45 feet with one AC unit, watermaker, and appliances usually need 7.5-9 kW. Larger vessels 45-60+ feet with multiple AC units, watermakers, and full galley equipment may need 12-20+ kW. Accumar Marine provides free load calculations and generator sizing consultations. Call 239-323-9600.

Marine generator installation costs vary by boat size, complexity, and whether it's a replacement or new installation. We provide free installation estimates that include a full scope of work. Call 239-323-9600 for a consultation.

If your generator is under 5,000 hours and the engine block is sound, repair or rebuild is usually the most cost-effective option. However, if the engine has major issues (cracked block, severe corrosion) or is over 8,000-10,000 hours, replacement may be more economical long-term. Accumar Marine can diagnose your generator and provide honest recommendations. Call 239-323-9600.

Accumar Marine services all major marine generator brands including Cummins Onan, Kohler, Westerbeke, Northern Lights, Fischer Panda, Phasor Marine, and more. We carry parts for all brands and have 30+ years of experience with marine diesel and gasoline generators. We also service older and discontinued models.

Marine generators should be serviced every 250-500 hours or annually, whichever comes first. Service includes oil and filter change, fuel filter replacement, raw water impeller inspection, belt inspection, coolant check, and exhaust system inspection. In Southwest Florida's salt air environment, we recommend more frequent inspections of cooling systems and exhaust components. Call for best pricing on annual service packages.

A generator rebuild involves disassembling the generator end (the electrical portion that produces power) and replacing worn components like bearings, brushes, voltage regulators, stator windings, and rotor. This restores the generator's electrical output to like-new condition at a fraction of replacement cost. Accumar Marine also performs engine overhauls including pistons, rings, bearings, gaskets, and injectors when needed.

Common causes include: dead or weak starting battery, fuel delivery issues (clogged filter, air in fuel lines, bad lift pump), glow plug failure (diesel), exhaust back-pressure from blocked muffler or elbow, low oil pressure safety shutdown, overheating safety shutdown, or control board failure. Accumar Marine offers comprehensive generator diagnostics. Call 239-323-9600.

Yes, Accumar Marine designs and installs complete generator systems for boats that currently rely solely on shore power. This includes generator selection and sizing, mounting and vibration isolation, exhaust system design and installation, fuel system plumbing, electrical integration with your existing panel, and automatic transfer switch installation. This is a popular upgrade for boats transitioning from coastal cruising to extended voyaging.