Marine Boat Mechanic

Our Services

Outboard Motor Repair

Outboard Engine Repair

At Cole's Marine Service LLC, we specialize in diagnosing and repairing Johnson and Evinrude outboard motors. Whether your engine is sputtering, overheating, or not starting at all, our marine technicians in Boise, ID have the tools and experience to pinpoint the issue and fix it fast. We handle everything from powerhead rebuilds to water pump replacements with precision and care.

Outboard engines are the heart of your vessel, and regular service is critical to ensure reliability on the water. Our shop offers both scheduled maintenance and emergency outboard repairs, with mobile options available for boat owners throughout Boise and surrounding areas. Trust Cole's Marine Service LLC to restore performance, improve fuel efficiency, and get you back on the water with confidence.
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Inboard Boat Engine Repair

Inboard & Sterndrive Repair

From inboard gas engines to diesel sterndrive systems, Cole's Marine Service LLC provides full-service mechanical support for vessels of all sizes in Boise, ID. We handle issues ranging from overheating, oil leaks, vibration, and shifting problems, using manufacturer-approved diagnostics and parts for every repair. If your inboard engine or sterndrive isn’t performing like it should, we’ll get to the root of the problem and restore it to peak condition.

Our team has experience working on popular brands like Volvo Penta, MerCruiser, and Crusader, offering reliable in shop service. Whether you need a transmission rebuild, cooling system repair, or full engine replacement, we offer honest evaluations and fast turnaround times. With Cole's Marine Service LLC, your boat's powertrain is in expert hands.
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Boat Repair Service

Routine Boat Maintenance

Preventative maintenance is the key to avoiding costly breakdowns and extending the life of your vessel. At Cole's Marine Service LLC, we offer routine boat maintenance services in Boise, ID, including oil changes, fuel filter replacements, spark plug checks, battery testing, and full system inspections. Our seasonal service packages help prepare your boat for spring launch or winter storage—ensuring everything runs smoothly when you need it most.

Regular maintenance also helps maintain fuel efficiency, engine health, and safe operation while out on the water. Whether you're a weekend boater or a full-time captain, our certified technicians will keep your boat in prime condition all year long. Contact Cole's Marine Service LLC to schedule a maintenance visit or enroll in a service plan tailored to your vessel's needs.
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Boat Electrical Repair

Electrical System Repairs

Electrical issues can leave boaters stranded or worse—put safety at risk. That’s why Cole's Marine Service LLC offers comprehensive marine electrical diagnostics and repairs in Boise, ID, for all types of vessels. We troubleshoot wiring issues, faulty batteries, bilge pumps, navigation lights, and marine electronics with precision testing tools and expert knowledge.

From simple battery swaps to complex electrical rewiring, we ensure that every circuit onboard your vessel is safe, functional, and up to standard. Our marine techs are trained to work on 12V and 24V systems and can install new components like chargers, switch panels, and sonar equipment. Trust Cole's Marine Service LLC to keep your boat’s electrical systems running smoothly and safely.
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Boat Fuel System repair

Fuel System Cleaning & Repair

Your boat's fuel system plays a vital role in overall engine performance. Dirty fuel, clogged injectors, and gummed-up lines can cause stalling, poor acceleration, or long-term engine damage. At Cole's Marine Service LLC in Boise, ID, we clean and service marine fuel systems to restore power, reduce emissions, and improve fuel efficiency.

We use professional-grade cleaners and pressure tools to remove sludge and varnish from fuel lines, tanks, and carburetors. Whether you're dealing with ethanol-related issues or simply haven't used your boat in a while, a thorough fuel system service can make a world of difference. Schedule a cleaning today and get your engine running like new.
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Keep Your Boat Running Strong
We’ll Handle the Repairs

For expert marine service in Boise, ID, trust Cole's Marine Service LLC to keep your engine—and your adventures—going strong.
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