Repair & maintenance guides

12-Volt Boat Wiring Basics: Circuits, Color Codes, Fuses and Wire Size

Learn how your boat's 12-volt system is laid out, what the ABYC wire colors mean, how fuses and breakers protect the wiring, why voltage drop and tinned wire matter, and how to read a wiring diagram, so you can troubleshoot smarter and know which jobs belong to a marine electrician.

Adding USB and 12V Outlets to Your Boat: Fusing, Wire Size and Placement

Phones, tablets and handheld radios need charging on every trip. Learn how to add a dedicated USB or 12-volt outlet the right way: choosing a quality marine socket, picking the wire size and fuse, deciding between a panel circuit and a direct battery feed, sealing the hole, and checking that the charger doesn't put noise on your VHF.

After the Storm: How to Safely Inspect Your Boat and Document Damage

Go back to your boat only when it is safe, check for fuel, live power and sinking risk before you step aboard, photograph everything for your insurer, then work through bilge, lines, canvas, electrical, engine, trailer and mold in a set order. Do not run the engine or leave the dock until it has been checked.

AIS on Your Boat: Receiver vs. Class B, MMSI Programming, Antennas and Checking You're Seen

Choose between a receive-only AIS and a Class B transponder, get the MMSI programmed the legal way, sort out the GPS and VHF antenna (or splitter), confirm other boats and the Coast Guard actually see you, and understand silent mode and AIS man-overboard beacons.

Anchor Basics: Choosing the Anchor, Rode and Scope, Setting It and Checking Your Gear

Match your anchor to the bottom you usually anchor in, put together a chain-and-nylon rode, let out enough scope for the depth and weather, set and check the anchor, use an anchor alarm, and inspect the rode, splices and shackles every season so the weakest link isn't hiding in your ground tackle.

Autopilot Care: Calibration, Drive Maintenance and Common Faults

Keep your autopilot steering straight and safe, whether it is a tiller pilot, a below-deck linear drive or a hydraulic pump on a center console. Check the drive and rudder feedback, fix voltage drop, calibrate the compass, run a proper sea trial, and work out what common alarms and wandering courses really mean.

Avoiding Boat-Buying Scams: Fake Listings, Fake Escrow, Overpayment Checks and Safe Payment

How to spot and avoid the scams that target boat buyers and sellers: too-good-to-be-true listings, sellers who are always overseas, look-alike escrow and shipping websites, overpayment checks and fake payment notices. Covers verifying the boat, the title, the HIN and the seller, paying safely, and what to do fast if you already sent money. Practical help, not legal advice.

Basic Rope Work for Boat Owners - Eye Splices, Whipping and Sealing Line Ends

Learn the rope skills every owner uses: put an eye splice in three-strand dock or anchor line, stop line ends from unraveling with a whipping or by melting them, know when double-braid splicing is worth it or when to buy pre-spliced line, and inspect splices so you retire a line before it fails.

Battery Goes Dead While the Boat Sits - How to Find a Parasitic Drain

If your boat battery is flat every time you come back, something may be quietly drawing power while you are away. Learn how to tell a bad battery from a drain, find the circuit with a multimeter and the fuse panel, and fix the usual culprits without disabling your bilge pump.

Battery Isolators Compared: Diode, ACR, Combiner and DC-DC Charger

Learn what the box between your engine and your batteries actually does, why an old diode isolator can leave batteries never quite full, and which charging setup suits an outboard, an inboard or a lithium house bank, plus a simple meter check of the one you have.

Battery Monitors with a Shunt: Installing, Setting Up and Reading State of Charge

A voltmeter can't tell you how full your house battery really is. Learn how a shunt-based battery monitor counts every amp going in and out, where the shunt goes on the negative side, which settings to change for lead-acid or lithium, and how to read the percentage without being fooled.

Bilge Blower and Engine Compartment Ventilation on Gas Inboards and Sterndrives

Learn why gas boats have a "run the blower 4 minutes" label, how to check that the blower and vent ducts actually move air out of the engine compartment, and how to replace a blower safely with an ignition-protected marine unit.

Boarding Ladder Upgrade: A Ladder You Can Reach and Use From the Water

Make sure anyone who ends up in the water - including you, alone - can pull down a ladder and climb back aboard. Compare ladder types, check how deep it reaches, mount it away from the propeller with proper backing, and test it from the water before you need it.

Boat Bonding System Explained: How to Inspect Bonding Wires, Through-Hulls and Anodes

Understand what the green bonding wires on your boat do, how they tie through-hulls, running gear, tanks and engines to your anodes and DC negative, how to inspect and test the connections yourself, and which corrosion warning signs mean it's time for an ABYC-certified technician.

Boat Damaged While Trailering: What to Do on the Road or at the Ramp, Insurance, and Hidden Damage Checks

Step-by-step help after a crash, blowout, sway accident or ramp mishap with your boat on the trailer: making the scene safe, police reports, photos, which insurance usually pays (your auto policy, your boat policy's trailer coverage, or the other driver's insurer), and how to inspect the trailer, hull, drive and bunks for damage you can't see at first. Policies and state rules vary, so your own policy wording and state law win.

Boat First-Aid Kit and Medical Prep: What to Carry, Day Trips to Offshore

Build and maintain a boat first-aid kit that fits how far from help you go, with the extras boaters actually need for seasickness, fish hooks, cuts, burns, sun, heat and cold, plus a crew briefing, expiration-date checks and training. General preparation only, not medical advice.

Boat Fuel Additives Explained: What Stabilizers, Ethanol Treatments and Boosters Really Do

The marine store shelf is full of bottles that promise to fix fuel problems. Learn what stabilizers, ethanol treatments, water removers, octane and cetane boosters, cleaners and diesel biocides actually do, what no additive can do, how to dose them by the label and why you should not stack several products in one tank.

Boat Horns and Sound Signals: Requirements, Testing and the Signals Every Skipper Should Know

Every boat needs a way to make an efficient sound signal, and bigger boats need a proper whistle or horn. Learn the Coast Guard requirements by boat length, how to test and fix an electric horn, why a canister air horn makes a good backup, and the basic passing, danger and fog signals.

Boat Ignition Key Switch: Diagnosing No-Crank and Intermittent Problems and Replacing It Right

A worn or corroded key switch can leave you with no crank, an engine that cuts out over bumps, or one that won't shut off. Learn how to rule out the battery, neutral switch and kill-switch lanyard first, test the switch with a meter, and replace it with the engine maker's switch wired exactly like the original.

Boat Insurance Policy Basics: Agreed Value vs Actual Cash Value, Navigation Limits, Storm Deductibles and Exclusions

Learn to read a boat insurance policy before you need it: agreed value versus actual cash value, navigation limits and lay-up periods, named storm deductibles, towing, salvage and wreck removal, liability limits, and the exclusions that cause most claim surprises. General information, not legal or insurance advice.

Boat Inverters and Inverter/Chargers: Sizing, Safe Use and What a Pro Must Install

An inverter turns battery power into 120-volt household current, which makes it as dangerous as shore power and a serious fire risk if it is fused or wired wrong. Learn how to size one realistically, what a safe installation looks like, the owner checks to do, and the mistakes (like backfeeding) that hurt people.

Boat Loan Add-Ons: GAP, Service Contracts and Credit Insurance, and How to Cancel Them

Understand the extras offered at the finance desk when you buy a boat (GAP coverage, extended service contracts and credit insurance), when one might make sense, what they really cost once financed, and how to decline, cancel or get a refund. General information, not financial or legal advice.

Boat Ramp Traction with a 2WD or Front-Wheel-Drive Vehicle: Stop Spinning, Stay Dry

Spinning tires on a slick ramp are embarrassing at best and dangerous at worst. Learn how rear-wheel, front-wheel, AWD and 4WD vehicles behave on a ramp, how to set up weight and tires, when to use 4WD Low, how to keep the vehicle from sliding in, and what to do if you get stuck.

Boat Registration Numbers and Validation Decals: Federal Display Rules, State Placement and Renewals

Display your state registration number and validation decal the way federal rules (33 CFR 173 and 174) and your state require: size, block style, contrast, spacing, placement on the forward half, decal position, what documented boats show instead (name and hailing port), what to carry aboard, and how to never miss a renewal. States add their own details, so check your state boating agency.