Services | JNB Boat Repair LLC

Comprehensive
Marine Care

JNB Boat Repair LLC is a full-service boat yard and marine facility equipped to handle virtually any repair, maintenance, or restoration job. We work on recreational and commercial vessels of all makes and sizes.

Every job begins with a thorough diagnostic assessment and a clear, written estimate — no guesswork, no hidden fees, no surprises at pickup.

Written estimate before any work begins

All makes and models — 14 to 75+ feet

Over 3,000 marine parts & accessories in stock

Mobile repair service available at your home port

Seasonal maintenance packages available

Full Detail

Our Core Services

Engine Repair & Service

Our engine repair services cover the full spectrum of inboard, outboard, and sterndrive systems. From routine tune-ups to complete overhauls, our certified technicians diagnose and fix marine power systems with precision and efficiency.

We carry a wide inventory of genuine parts and can source virtually any component quickly to minimize your downtime on the water.

Diagnostic & inspection
Complete overhauls
Fuel system service
Cooling system repair
Transmission service
Impeller replacement
Outboard tune-up
Sterndrive rebuild

Request Engine Service

Hull Repair & Fiberglass

A compromised hull isn't just cosmetic — it affects performance, fuel efficiency, and structural integrity. Our hull repair specialists provide expert fiberglass work, gelcoat restoration, and full structural repairs to keep your vessel safe and looking great.

We handle everything from minor osmotic blisters to major impact damage, using industry-grade materials and proven techniques.

Osmotic blister repair
Impact damage repair
Gelcoat refinishing
Structural laminate work
Bottom paint application
Keel repair
Transom replacement
Deck repair

Request Hull Service

Electrical Systems

Modern boats rely on complex electrical systems for navigation, safety, and comfort. Our certified marine electricians troubleshoot and resolve any electrical issue — from simple battery replacements to complex wiring harness overhauls and navigation system installations.

We follow ABYC standards on all electrical work to ensure safety and compliance.

Wiring diagnostics
Battery installation
Bilge pump systems
Navigation electronics
Shore power systems
Lighting upgrades (LED)
VHF radio installation
Autopilot systems

Request Electrical Service

Preventive Maintenance

Regular maintenance is the most cost-effective investment a boat owner can make. Our comprehensive maintenance programs are designed to keep your vessel running at peak performance, prevent expensive failures, and extend the life of every system on board.

We offer single-service maintenance appointments and annual maintenance packages tailored to your vessel and usage patterns.

Annual haul & inspection
Fluid changes (oil, gear)
Spark plug service
Impeller replacement
Belt & hose inspection
Zincs replacement
Winterization
Spring commissioning

Schedule Maintenance

Dockside Assistance

Sometimes the problem finds you before you can get to us. JNB's mobile repair team can come directly to your vessel's home port to provide on-the-spot diagnostics, repairs, and emergency assistance — getting you back on the water faster.

Available throughout the greater Bellflower and Los Angeles area. Call or email us to check availability and response times for your location.

Mobile diagnostics
Emergency repairs
Battery jump & replacement
Fuel system flush
Bilge pump repair
Prop removal & install
Freshwater flush
Pre-launch check

Request Dockside Service

Expert Marine
Services

Comprehensive
Marine Care