Boat Repair & Marine Service in Middle Tennessee

From electrical upgrades to fiberglass and engine service, we keep Middle Tennessee boaters on the water. Columbia, TN shop plus mobile marina service to Nashville, Franklin, and area lakes.

Get a Free Quote 📞 (615) 805-6097

Electrical Systems

Complete marine electrical system design, installation, and troubleshooting. LiFePOâ‚„ conversions, charging upgrades, and more.

  • DC system design and installation
  • LiFePOâ‚„ battery conversions
  • Charging & alternator upgrades
  • Electrical troubleshooting
Schedule Electrical Service

Fiberglass & Gelcoat

Structural and cosmetic fiberglass repair. From minor gelcoat damage to more significant repairs done properly.

  • Gelcoat repair and color matching
  • Structural fiberglass repair
  • Blister repair
  • Through-hull installations
Schedule Fiberglass Repair

Leak Diagnosis & Repair

Systematic leak detection and repair. We find the source, not just where water ends up, and fix it correctly.

  • Deck and hull leak detection
  • Window and hatch resealing
  • Through-hull and fitting leaks
  • Chainplate and deck hardware
Schedule Leak Repair

Engine Servicing

Scheduled maintenance and troubleshooting for inboard and outboard motors to keep you dependable on the water.

  • 100-hour service
  • Impeller replacement
  • Diagnostics
Schedule Engine Service

Generator Service

Marine generator maintenance, repair, and troubleshooting. Keep your onboard power reliable.

  • Generator maintenance
  • Troubleshooting and repair
  • Oil and filter service
  • Fuel system service
Schedule Generator Service

Current Specials

Limited-time service packages to get your boat ready for the season.

Spring Commission Package

Complete spring commissioning to get your boat ready for the season. System checks, engine service, electrical inspection, and hull survey.

Schedule Spring Commission

Pre-Departure Package

Comprehensive inspection before extended cruising. Electrical systems, charging verification, safety equipment review, and systems testing.

Schedule Pre-Departure Inspection

Complete Power System

Custom marine electrical system upgrade designed for your boat. LiFePOâ‚„ house bank, charging system, and monitoring for cruising or liveaboard use.

Schedule Power Consultation

ABYC Member — Built to Standards

Marine electrical work isn't the same as household wiring. Salt water, vibration, and the consequences of failure demand a higher standard.

TwinCraft is an ABYC member organization. All our marine electrical work follows ABYC (American Boat and Yacht Council) standards — the industry benchmark for safety and reliability. This means:

  • ✓ Proper wire sizing and protection
  • ✓ Correct terminal connections and strain relief
  • ✓ Appropriate fusing and circuit protection
  • ✓ Ignition protection where required
  • ✓ Proper grounding and bonding
ABYC Member - Safety Built In

Service Area

Columbia, TN shop plus mobile service to marinas and ramps across Middle Tennessee.

Cities

Columbia, Nashville, Franklin, Hermitage, Murfreesboro, Spring Hill

Lakes

J. Percy Priest, Old Hickory, Center Hill, Tims Ford

Shop Location

2016 Circle Dr, Columbia, TN 38401

By appointment — contact us to schedule

Don't see your marina or lake? Contact us — we likely can still help.

Ready to Get Back on the Water?

Tell us about your boat and what you need. We'll get you back out there.

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