Marine Generator
Service & Repair
Authorized generator service for Kohler, Northern Lights, Cummins Onan and Fischer Panda. ACCUMAR provides diagnostics and repair planning in Southwest Florida by appointment.
Brands We Service
Common Marine Generator Problems
Southwest Florida's heat, humidity, and warm seawater are hard on generators. Here's what we see most often.
Won't crank
We separate battery, starter-circuit, relay, switch, wiring, safety and controller conditions from a true no-start.
Cranks but won't start
Fuel delivery, sensors, controls and mechanical conditions can all affect the starting sequence; testing identifies the next step.
Starts then shuts down
Timing matters. We review oil-pressure, cooling, raw-water flow, fuel, sensor and controller evidence before resetting faults.
Fault codes or alarms
Bring the exact alarm wording and event history when available; an alarm label alone does not prove a failed part.
Low or high voltage
Output testing can distinguish regulator, alternator, wiring, breaker, load and control-system concerns.
Frequency hunting
Unstable Hz may involve engine speed, governor, load or control conditions and should be assessed before sensitive loads run.
Low oil pressure
We investigate pressure conditions and indications that may trigger protective shutdowns; do not bypass safety systems.
Smoke or raw-water failure
White, blue or black smoke and weak raw-water flow are diagnostic clues requiring inspection of the installed system.
Generator Services
From routine annual service to diagnostics, repair planning, and complete installations. Yes, that means crawling into tight engine rooms — what we call engineer's yoga.
Repair & Diagnostics
On-board troubleshooting of generator fuel, electrical, cooling, exhaust, and control systems. Repair timing depends on findings, access, approved scope, parts, and required testing.
Annual Service
Oil change, fuel filters, raw water impeller, belt inspection, coolant check, battery test, load bank test, and full operational verification.
Installation & Repowering
New generator installations and repower of aging units. Proper sizing, mounting, exhaust, cooling, fuel supply, and electrical integration.
Load Bank Testing
Verify your generator can handle its rated load. Identifies weak cylinders, fuel delivery problems, and governor issues before they strand you.
Sound Dampening
Reduce generator noise with proper enclosure design, exhaust upgrades, vibration isolation mounts, and sound insulation materials.
Scheduled Service Review
Generator down at the dock or on the hook? Send the make, model, serial, alarms, symptoms, location, access, and photos for business-hour review.
Project-Based Pricing
All generator service is quoted on a project basis — you'll know the cost upfront before we start. Annual service, diagnostics, repairs, and installations are each scoped and priced as a complete project.
Standard service labor
Starting at $160 per hour
One-hour minimum unless different project pricing is specified in writing.
Call 239-323-9600 for a project quote. Appointment requests are reviewed during business hours; availability is confirmed case by case.
Service Area
We service marine generators at marinas, boatyards, and private docks throughout Southwest Florida.
Schedule Generator Service
Call us directly or book online. Include your generator make, model, and hours if known.
Frequently Asked Questions
What marine generator brands do you service?
We provide authorized generator service for Kohler, Northern Lights, Cummins Onan and Fischer Panda. Service scope, documentation, tooling, parts access and timing are confirmed from the exact equipment and fault.
How much does marine generator service cost?
Generator service labor is available starting at $160 per hour with a one-hour minimum or may be quoted as a defined project. Routine annual service, major repairs, and overhauls are scoped according to the work required. Appointment requests are reviewed during business hours, with timing confirmed case by case. Call 239-323-9600 for a quote.
How often should my marine generator be serviced?
Follow the manufacturer's schedule — typically every 100-250 hours or annually, whichever comes first. In Southwest Florida's heat and humidity, we recommend the shorter interval. Key service items: oil and filter change, fuel filter replacement, raw water impeller, belt inspection, coolant check, and load bank test.
My generator won't start. What should I check?
Before calling us, check: fuel supply and shutoff valve, battery charge and connections, seawater intake (strainer clogged?), oil level (low oil safety shutoff), and the breaker/switch panel. If those are all good and it still won't start, it's likely a fuel delivery, ignition, or control board issue — call us at 239-323-9600.
Can you install a new generator on my boat?
Yes. We handle complete generator installations including engine bed fabrication, exhaust system routing, fuel supply plumbing, raw water cooling, electrical integration with your AC panel, sound dampening, and ventilation. We size the generator to your actual load requirements — not guesswork.
What causes generator overheating on boats?
Generator overheating can involve a damaged raw-water impeller, blocked strainer, restricted or collapsed hose, heat-exchanger condition, thermostat faults, exhaust restriction, load, or another system issue. ACCUMAR tests the installed system and confirms parts availability by exact model before recommending repair.
Keep Your Generator Running
A dead generator means no AC, no refrigeration, and no power. Don't wait for a failure — schedule your annual service today.
Captain's Maintenance Bulletin
Seasonal checklists, diagnostic tips, and marine AC insights from decades of experience in the field. No fluff — just what works.
Tell us what the vessel needs.
Open ACCUMAR’s verified Jobber Client Hub to submit available request details, review a quote, approve a required deposit, and keep job records in one secure place.
Recent Jobs
ACCUMAR job records and photographs. Job dates, reported faults, findings, repairs and verification are published only when supplied by Roland. Dates are not supplied for these records; this is not a chronological job list.
Actual ACCUMAR service photographs. Each caption retains its own recorded location; these are not all one assignment. No repair outcome is inferred. Select a photograph to enlarge it. Use the arrows or swipe to move through the gallery.
Close view of MTU-labeled engine covers aboard the Pershing 80. Naples, Florida.
Related ACCUMAR serviceMTU 16V diesel service showing filters, pipes and an engine-mounted heat exchanger. Naples, Florida.
Related ACCUMAR serviceMTU 16V diesel service with closely arranged cooling and filtration components. Naples, Florida.
Related ACCUMAR serviceCummins Onan generator service aboard the Pershing 80 in Naples, identified by ACCUMAR’s owner. The image shows the generator and surrounding engine-room equipment. Naples, Florida.
Related ACCUMAR serviceEngine room aboard a 78-foot Donzi, with twin marine engines, exhaust piping, hoses and adjacent service equipment.
Related ACCUMAR serviceNew fuel filter installed in the middle of the equipment space, with battery chargers to the right.
Related ACCUMAR serviceAuthorized generator service for Kohler, Northern Lights, Cummins Onan and Fischer Panda. Work is matched to the installed model and current parts support.
Typical price ranges
Quoted after an inspection. Labor starting at $160/hr, 1-hour minimum.
Diagnostic visit
Most jobs run $200–$400, parts included, before tax. Every boat is different, and we confirm the price after we look at it. Labor starts at $160/hr with a 1-hour minimum.
Our AI phone receptionist answers calls 24/7. Service is by appointment, not 24/7, and there is no emergency service. Typical lead time: 3–4 weeks.
Request ServiceFrequently Asked Questions
Awaiting Roland’s real customer questions and answers.
Focused service pages
Equipment-specific symptoms, access requirements and information to send before your appointment.