Repair & maintenance guides
Plain-English, step by step, written for owners. Pick your engine to see the guides that apply to it.
18 of 459 guides

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.

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.

Boater Education Cards: Who Needs One, How to Get It and When It Works in Other States
Most states require some boat operators to complete an approved boating safety course and carry proof. Learn how to find your state's rule (age, horsepower, boat type), pick a NASBLA-approved course, get the card, use it when you visit other states, and what rental and other exemptions usually look like. Practical guidance, not legal advice.

Boating Accident Reports: When You Must File and What to Collect
Know when federal rules require a written boating accident report, how fast it is due, who to send it to and what details and photos to gather at the scene, so you meet the deadline and your insurance claim goes smoothly. Practical help, not legal advice.

Boating at Night: Lights, Speed, Night Vision and Reading Other Boats
Get ready for a safe run after dark, from checking your navigation lights and dimming the helm to slowing down, reading other boats' lights and buoys, keeping life jackets on and leaving the alcohol ashore.

Boating in Fog: When to Stay In, Sound Signals, Safe Speed and Using Your Electronics
Fog can roll in on any lake, bay or coast. Learn when to stay at the dock, the fog signals the Coast Guard rules require, how slow is slow enough, how to use radar, AIS and your chartplotter without trusting them blindly, and when to simply anchor and wait it out.

Boating Under the Influence (BUI): The Law, the Limits and How to Plan a Sober Skipper
Operating a boat drunk or high is illegal in every state and under federal law, with a 0.08 BAC standard for recreational boats under 33 CFR Part 95. Learn why the sun, wind, noise and motion make alcohol hit harder on the water, what happens at a boarding (field sobriety tests, chemical tests and implied consent), the penalties, and how to plan a designated skipper. Practical guidance, not legal advice.

Clean, Drain, Dry: Stopping Zebra and Quagga Mussels and Other Invasive Species
What Clean, Drain, Dry means in practice for your boat, trailer and motor, what to drain before you leave the ramp, what happens at a watercraft inspection or decontamination station, and examples of state rules you may run into when you trailer between lakes.

FCC Ship Station License vs. a Free MMSI: Which One Your Boat Needs, and How to Keep It Current
Most U.S. recreational boats that stay in U.S. waters don't need an FCC radio license, but every DSC radio and AIS needs a registered MMSI. Learn when an FCC ship station license and operator permit are required (foreign ports, SSB/HF, satellite), how to get an MMSI from BoatUS, America's Boating Club or Shine Micro, and what to do when you sell, buy or rename a boat.

Helping Another Boater: Your Duty to Assist, Safe Approaches, and When Not to Tow
What the law expects when you come across a boater in trouble, how to approach a disabled or sinking boat safely, how to take people aboard, the basics of a short tow, and when to stand by and call the Coast Guard, Sea Tow or TowBoatUS instead. People first, boats second.

How to Get Through Aquatic Invasive Species Boat Inspection Stations
Many states, especially in the West, make you stop at an inspection station before you launch or when you cross the state line, to keep zebra and quagga mussels out. Learn what inspectors check, when they decontaminate, what decals, courses and seals you may need, and how to arrive clean, drained and dry so you're through fast.

How to Read Buoys and Channel Markers: Red Right Returning and the U.S. Aids to Navigation System
Learn what the red and green buoys, daymarks and lights are telling you: red right returning, nuns and cans, odd and even numbers, preferred channel, safe water, isolated danger, the orange-and-white regulatory and information markers, the yellow symbols on the Intracoastal Waterway and how the Western Rivers system differs. Based on the Coast Guard's U.S. Aids to Navigation System rules (33 CFR Part 62).

How to Size, Rig and Inspect Dock Lines and Fenders
Pick the right dock line diameter and fender size for your boat, set up bow, stern and spring lines in a slip, add chafe gear, inspect for wear and UV damage, and double everything up before a storm.

Lake Engine Restrictions: Two-Stroke Bans, Horsepower Limits, Electric-Only and No-Wake Lakes
Some lakes ban older two-stroke outboards, cap horsepower, allow only electric motors, or make the whole lake no-wake. Learn the common types of rules (with dated real examples like Lake Tahoe and Ohio's lake list), how to tell what kind of engine you have, and how to check before you tow the boat three hours to a ramp you can't use.

Reading Marine Weather Forecasts: Advisories, Wind, Waves and Go/No-Go
Learn where to get the official NOAA marine forecast for your waters, what small craft advisories and warnings really mean, how to read wind and wave numbers, and how to make a simple go/no-go call before you leave the dock.

Right-of-Way on the Water: The Navigation Rules Every Recreational Boater Should Know
There are no lanes or stop signs on the water, so the Navigation Rules decide who keeps course and who gets out of the way. Learn stand-on and give-way, meeting head-on, crossing, overtaking, sail versus power, narrow channels, big ships, safe speed and keeping a proper lookout, with the rule numbers from the U.S. Inland Navigation Rules (33 CFR Part 83).

When Guests Chipping In Becomes an Illegal Charter: Passengers-for-Hire Rules for Boat Owners
Friends voluntarily sharing the gas money is fine, but if anyone must pay or bring something as a condition of the trip, your boat is carrying passengers for hire and needs a Coast Guard-credentialed captain, and more than six passengers needs an inspected boat. Learn the legal tests, the six-pack (OUPV) license, what a real bareboat charter looks like, the risks of renting through peer-to-peer apps, and the insurance questions to ask. Practical guidance, not legal advice.

Where to Clean Fish and Get Rid of the Waste: Marina Rules, State Laws and Fishing Line Recycling
Tossing fish guts over the side is legal in some places and a fine in others, and filleting at sea can break size-limit rules. Learn when to keep fish whole, how to use a cleaning station, what to do with carcasses, and how to recycle old monofilament line, with dated examples from state and federal rules.
Safety: BoatMend is for information only and does not replace a certified marine technician. You are responsible for your safety and your boat. Read the full disclaimer.