Accumar Marine Services
ACCUMARMarine Services
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Marine Generator Sales, Repair & Rebuild

New generators, expert repair, complete rebuilds, and professional replacement. Serving all major brands with 25+ years of marine generator experience in Southwest Florida.

34+ Generators 6 Premium Brands Repair & Rebuild 4.7 Avg Rating

Our Generator Services

From new sales to emergency repair — we handle it all

New Generator Sales

Complete selection of marine generators from all major brands. We help you choose the right size and brand for your vessel, then handle professional installation.

From $7,740 (unit) + installation

Generator Repair

Expert diagnostics and repair for all brands. Fuel system, cooling system, electrical, exhaust, and control board troubleshooting and repair.

Starting at $150 (diagnostics)

Generator Rebuild

Generator end rebuilds restore electrical output to like-new condition. Engine overhauls including pistons, rings, bearings, gaskets, and injectors.

From $2,500 (gen end rebuild)

Generator Replacement

When repair isn't cost-effective, we handle complete generator replacement including removal, new unit installation, exhaust, fuel, and electrical.

From $2,000 (labor) + unit

Annual Maintenance

Comprehensive annual service: oil & filter change, fuel filter, impeller inspection, belt check, coolant, exhaust inspection, and load testing.

$400-$800 per service

Emergency Service

Generator down at the dock or on the water? We offer priority emergency service for generator failures in the Fort Myers and Southwest Florida area.

Call for availability

Authorized Service for the World's Best Marine Generators

Cummins Onan

The Industry Standard in Marine Power

  • Largest marine generator manufacturer
  • 5-29 kW range covers all vessels
  • Extensive dealer & parts network
  • QD series with sound shields

Best for: All vessel types — most popular choice

Kohler

Reliable Power, Proven Performance

  • 5-20+ kW diesel range
  • Sound shield options
  • Strong dealer network
  • Competitive pricing

Best for: Cost-conscious buyers seeking reliability

Westerbeke

Marine-Proven Diesel & Gas Generators

  • Both diesel & gasoline models
  • Low RPM operation
  • Extended service life
  • Low CO gasoline models

Best for: Gas-powered boats & budget-friendly options

Northern Lights

Built for the Harshest Marine Environments

  • 1800 RPM long-life design
  • Premium build quality
  • 6-38 kW range
  • Commercial-grade durability

Best for: Cruisers, trawlers & commercial vessels

Fischer Panda

The World's Quietest Marine Generators

  • Variable speed technology
  • Super-silent operation
  • 100% freshwater cooled
  • Compact & lightweight

Best for: Sailboats & noise-sensitive installations

Phasor Marine

Compact Power for Tight Spaces

  • 3.5-8 kW compact range
  • Competitive pricing
  • 1800 RPM operation
  • Ignition protected models

Best for: Small boats & space-constrained installations

Generator Catalog

Showing 34 of 34 generators

Cummins OnanDiesel
5 kW

QD 5 kW

Model: MDKBH

From $10,693

  • Diesel
  • 60 Hz
  • Sound shield
  • Digital display ready

Best for: Small cruisers & sailboats

Citimarine / Bosch Marine
Cummins OnanDiesel
7.5 kW

QD 7.5 kW

Model: MDKBJ

From $13,230

  • Diesel
  • 60 Hz
  • Sound shield
  • Low vibration

Best for: Mid-size cruisers 30-40ft

Citimarine / Bosch Marine
Cummins OnanDiesel
9 kW

QD 9 kW

Model: MDKBL

From $15,000

  • Diesel
  • 60 Hz
  • Sound shield
  • High capacity

Best for: Cruisers & sportfish 35-45ft

Citimarine / Bosch Marine
Cummins OnanDiesel
9 kW

QD 9 kW Space Saver

Model: MDKDK

From $15,500

  • Diesel
  • 60 Hz
  • Compact design
  • Tight engine rooms

Best for: Space-constrained installations

Citimarine / Bosch Marine
Cummins OnanDiesel
11.5 kW

QD 11.5 kW

Model: MDKDM

From $18,000

  • Diesel
  • 60 Hz
  • Sound shield
  • Multi-AC capable

Best for: Large cruisers 40-50ft

Citimarine / Bosch Marine
Cummins OnanDiesel
13.5 kW

QD 13.5 kW

Model: MDKDN

From $21,000

  • Diesel
  • 60 Hz
  • Sound shield
  • Heavy duty

Best for: Sportfish & motor yachts 45-55ft

Citimarine / Bosch Marine
Cummins OnanDiesel
17 kW

QD 17 kW

Model: MDKDP

From $24,000

  • Diesel
  • 60 Hz
  • Sound shield
  • Full vessel power

Best for: Motor yachts 50-65ft

Citimarine / Bosch Marine
Cummins OnanDiesel
21.5 kW

QD 21.5 kW

Model: MDKDR

From $30,000

  • Diesel
  • 60 Hz
  • Sound shield
  • High output

Best for: Large yachts 60-80ft

Citimarine / Bosch Marine
Cummins OnanDiesel
29 kW

QD 29 kW

Model: MDKDS

From $37,000

  • Diesel
  • 60 Hz
  • Sound shield
  • Maximum power

Best for: Mega yachts & commercial vessels

Citimarine / Bosch Marine
KohlerDiesel
5 kW

5EKD

Model: 5EKD

From $9,200

  • Diesel
  • 60 Hz
  • Sound shield option
  • 12V start

Best for: Small cruisers & sailboats

Citimarine / West Marine
KohlerDiesel
7.3 kW

7.3EKD

Model: 7.3EKD

From $12,000

  • Diesel
  • 60 Hz
  • Sound shield option
  • Compact design

Best for: Mid-size cruisers 30-40ft

Citimarine / West Marine
KohlerDiesel
9 kW

9EKD

Model: 9EKD

From $14,000

  • Diesel
  • 60 Hz
  • Sound shield option
  • Low RPM

Best for: Cruisers & sportfish 35-45ft

Citimarine / West Marine
KohlerDiesel
12 kW

12EKD

Model: 12EKD

From $17,000

  • Diesel
  • 60 Hz
  • Sound shield
  • Multi-AC capable

Best for: Large cruisers 40-55ft

Citimarine / West Marine
KohlerDiesel
14 kW

14EKD

Model: 14EKD

From $20,500

  • Diesel
  • 60 Hz
  • Sound shield
  • Heavy duty

Best for: Sportfish & motor yachts 45-60ft

Citimarine / West Marine
KohlerDiesel
20 kW

20EKD

Model: 20EKD

From $26,500

  • Diesel
  • 60 Hz
  • Sound shield
  • High output

Best for: Motor yachts & large sportfish

Citimarine / West Marine
WesterbekeGasoline
5 kW

5.0 MCGA

Model: 5.0MCGA

From $8,200

  • Gasoline
  • 60 Hz
  • Low CO
  • Compact

Best for: Gas-powered boats under 30ft

Citimarine / West Marine
WesterbekeDiesel
5 kW

5.0 BCD

Model: 5.0BCD

From $10,000

  • Diesel
  • 60 Hz
  • Low RPM
  • Quiet operation

Best for: Diesel sailboats & small cruisers

Citimarine / West Marine
WesterbekeDiesel
8 kW

8.0 BCD

Model: 8.0BCD

From $13,000

  • Diesel
  • 60 Hz
  • Low RPM
  • Long life design

Best for: Mid-size cruisers & trawlers

Citimarine / West Marine
WesterbekeGasoline
10 kW

10.0 SBEG

Model: 10.0SBEG

From $11,000

  • Gasoline
  • 60 Hz
  • Side mount
  • Low CO

Best for: Gas-powered cruisers 30-40ft

Citimarine / West Marine
WesterbekeGasoline
12.5 kW

12.5 SBEG

Model: 12.5SBEG

From $13,000

  • Gasoline
  • 60 Hz
  • Side mount
  • Multi-AC capable

Best for: Gas-powered cruisers 35-45ft

Citimarine / West Marine
WesterbekeGasoline
14 kW

14.0 SBEG

Model: 14.0SBEG

From $15,000

  • Gasoline
  • 60 Hz
  • Side mount
  • High output

Best for: Large gas-powered vessels

Citimarine / West Marine
Northern LightsDiesel
6 kW

M673L3G 6 kW

Model: M673L3G

From $12,500

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Long life design

Best for: Cruising sailboats & trawlers

Trans Atlantic Diesels
Northern LightsDiesel
8 kW

M773LW3 8 kW

Model: M773LW3

From $15,500

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Marine proven

Best for: Mid-size cruisers 30-40ft

Trans Atlantic Diesels
Northern LightsDiesel
16 kW

M844W3 16 kW

Model: M844W3

From $27,465

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Heavy duty

Best for: Motor yachts & commercial vessels

Trans Atlantic Diesels
Northern LightsDiesel
38 kW

M944T 38 kW

Model: M944T

From $37,995

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Maximum power

Best for: Large yachts & commercial vessels

Trans Atlantic Diesels
Fischer PandaVariable Speed
5 kW

5000i Neo PMS

Model: 5000i-Neo

From $19,900

  • Variable speed
  • Super silent
  • 100% freshwater cooled
  • Compact

Best for: Quiet-critical sailboats & cruisers

Fischer Panda Dealer
Fischer PandaVariable Speed
8 kW

8000i Neo PMS

Model: 8000i-Neo

From $24,500

  • Variable speed
  • Super silent
  • 100% freshwater cooled
  • Fuel efficient

Best for: Mid-size quiet installations

Fischer Panda Dealer
Fischer PandaVariable Speed
15 kW

15000i Neo PMS

Model: 15000i-Neo

From $35,000

  • Variable speed
  • Super silent
  • 100% freshwater cooled
  • High output

Best for: Large yachts requiring silence

Fischer Panda Dealer
Fischer PandaDC Generator
3.2 kW

AGT DC4000 24V

Model: AGT-DC4000

From $3,132

  • DC output 24V
  • Variable speed
  • Battery charging
  • Ultra compact

Best for: DC battery charging systems

Fischer Panda Dealer
Phasor MarineDiesel
3.5 kW

LP1 3.5 kW

Model: LP1-3.5kW

From $7,740

  • Diesel
  • 60 Hz
  • Compact
  • Low RPM

Best for: Small sailboats & pocket cruisers

Citimarine / Phasor Dealer
Phasor MarineDiesel
4.5 kW

K2-4.5 kW

Model: K2-4.5pmg

From $9,565

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Ignition protected

Best for: Sailboats & small cruisers

Citimarine / Phasor Dealer
Phasor MarineDiesel
6.5 kW

K3-6.5 kW Compact

Model: K3-6.5KW

From $11,055

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Compact series

Best for: Space-constrained installations

Citimarine / Phasor Dealer
Phasor MarineDiesel
7 kW

K3-7.0 kW

Model: K3-7.0kW

From $10,530

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Standard series

Best for: Mid-size cruisers & sailboats

Citimarine / Phasor Dealer
Phasor MarineDiesel
8 kW

K3-8.0 kW Compact

Model: K3-8.0KW

From $11,980

  • Diesel
  • 60 Hz
  • 1800 RPM
  • Compact series

Best for: Cruisers needing compact power

Citimarine / Phasor Dealer

Brand Comparison at a Glance

Quick overview to help you choose the right generator brand

FeatureCummins OnanKohlerWesterbekeNorthern LightsFischer Panda
Best ForAll vesselsBudget-friendlyGas boatsCruisers/trawlersQuiet installs
Fuel TypeDieselDieselDiesel & GasDieselDiesel (variable)
Range5-29 kW5-20 kW5-20 kW6-38 kW3.2-15+ kW
Entry Price~$10,693~$9,200~$8,200~$12,500~$3,132 (DC)
Noise Level★★★★☆★★★★☆★★★★☆★★★★☆★★★★★
Dealer Network★★★★★★★★★☆★★★★☆★★★☆☆★★★☆☆
Parts Availability★★★★★★★★★☆★★★★☆★★★★☆★★★☆☆
Value for Money★★★★☆★★★★★★★★★★★★★★☆★★★☆☆

What Our Customers Say

4.7

Based on 6 verified service jobs

"Accumar replaced my 20-year-old Onan with a new QD 13.5 kW. The installation was flawless — new exhaust, fuel lines, and electrical. Runs quieter than the old one and powers both AC units plus the watermaker with no issues."

Captain Jim W.

45ft Hatteras • Cummins Onan QD 13.5 kW

Jan 2026

"Roland recommended Northern Lights for our trawler and we couldn't be happier. The 1800 RPM operation is noticeably quieter than our old generator. Accumar handled the entire installation including custom exhaust routing."

Dave & Karen M.

38ft Trawler • Northern Lights M773LW3 8 kW

Dec 2025

"We wanted the quietest generator possible for our sailboat. The Fischer Panda is whisper quiet — you can barely hear it running. Installation was complex but Accumar handled it professionally. Worth every penny for the silence."

Captain Steve P.

32ft Sailboat • Fischer Panda 5000i Neo

Nov 2025

"My Onan was producing low voltage and tripping breakers. Accumar diagnosed a bad generator end and rebuilt it for about $3,000 — saved me over $10,000 compared to replacement. Generator runs like new now."

Mike R.

42ft Sportfish • Cummins Onan QD 9 kW (rebuild)

Oct 2025

"Had Accumar install a Kohler 20EKD on my Viking. They handled everything — generator mounting, vibration isolation, exhaust system, fuel plumbing, and electrical integration. Professional work from start to finish."

Tom L.

50ft Viking • Kohler 20EKD

Sep 2025

"Our Westerbeke wouldn't start after sitting for a season. Accumar diagnosed fuel delivery issues, replaced the lift pump and fuel filters, and had it running in a day. Fair pricing and honest diagnosis."

Jennifer & Paul S.

36ft Catalina • Westerbeke 5.0 BCD (repair)

Aug 2025

Frequently Asked Questions

What size marine generator do I need for my boat?
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.
How much does it cost to install a marine generator?
Marine generator installation costs vary by boat size and complexity. A basic installation on a boat with an existing generator compartment typically runs $2,000-$4,000 for labor. New installations requiring exhaust routing, fuel line plumbing, and electrical connections can run $4,000-$8,000+. The generator unit itself ranges from $7,000 for a small 4 kW unit to $35,000+ for a 29 kW unit. Accumar Marine provides free installation estimates. Call 239-323-9600.
Should I repair or replace my marine generator?
If your generator is under 5,000 hours and the engine block is sound, repair or rebuild is usually the most cost-effective option. A generator end rebuild costs $2,500-$4,000 compared to $12,000+ for a new unit. 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.
What brands of marine generators do you service?
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 25+ years of experience with marine diesel and gasoline generators. We also service older and discontinued models.
How often should a marine generator be serviced?
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. Annual service typically costs $400-$800 depending on the generator model.
What is a marine generator rebuild?
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.
Why won't my marine generator start?
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 starting at $150. Call 239-323-9600.
Can you convert my boat from shore power to generator power?
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.

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Need Generator Service or a New Installation?

Whether your generator needs repair, a complete rebuild, or you're ready for a new unit, Accumar Marine has the expertise and parts to get you powered up. Free consultations and competitive pricing on all brands.