Repair & maintenance guides

Electric Marine Toilet Troubleshooting: Won't Flush, Weak Flush, Won't Stop Filling

Electric and macerating marine heads fail in a handful of predictable ways. Work from the cheapest checks to the messiest ones to fix a toilet that won't run, flushes weakly, trips its breaker, keeps filling, loses or gains water in the bowl, or backs up, and learn what to keep out of it.

Electric Outboard Care: Battery Storage, Connectors, Saltwater Rinse and Updates

Electric outboards like Torqeedo, Mercury Avator and ePropulsion need far less work than gas engines, but the lithium battery, the connectors and the prop still need care. Charge and store the battery the way the maker says, keep plugs dry and clean, rinse after salt water, check the prop, fin and anodes, install updates, and follow the rules for transporting lithium batteries.

Electric-Over-Hydraulic and Electric Trailer Brakes: Controller Setup, Breakaway and Care

Why most boat trailers use surge or electric-over-hydraulic (EOH) brakes instead of plain electric drums, how to pick a compatible in-cab brake controller and set its gain, how to test the breakaway switch and battery, and how to keep the system working around saltwater.

Electrical Safety at Your Private Dock or Boat Lift: GFCI, Shock Drowning and Annual Checks

Lights, outlets, lift motors and de-icers at a home dock put household current right next to the water, and a hidden fault can kill a swimmer without any warning. Learn the owner checks you can do safely, the protection your dock should have, the no-swimming rule, and which jobs must go to a licensed electrician.

Electronics That Reset or Shut Off When You Start the Engine: Finding and Fixing Voltage Sag

If your chartplotter, fishfinder, VHF or stereo blinks off or reboots when you crank the engine or switch on a big load, the cause is almost always low voltage reaching the device. This guide walks from the cheapest checks (battery, connections, grounds) to the real fixes: a dedicated electronics feed, start isolation between batteries, and voltage-stabilizing converters.

Emergency Drills for Your Crew: Engine Failure, Fire, Steering Loss and Man Overboard

Practice what everyone aboard does when the engine quits, a fire starts, the steering fails or someone falls in. A few short drills each season turn panic into a plan, and teach your crew to anchor, call for help on VHF 16 or DSC, and get a tow.

Emergency Steering: What to Do When Your Boat's Steering Fails

A plan for the day the wheel goes slack or locks up - stop safely, find the problem, then steer home with an emergency tiller, twin engines, a drogue or a bridled bucket - plus how to build the gear and practice it before you need it, on outboard, sterndrive and inboard boats.

Engine Alignment on Sterndrives and Inboards: What to Check and When

A sterndrive engine must line up with its gimbal bearing and coupler, and an inboard engine with its prop shaft. When it drifts out of line you get vibration, noise and worn-out couplers, bearings and seals. Learn the warning signs, the checks you can do yourself and why the alignment itself is a job for a pro with special tools.

Engine and Gearbox Oil Analysis: How to Take a Clean Sample and Read the Report

A lab oil analysis is like a blood test for your engine, transmission or lower unit. Learn how to pull a clean sample, what the lab measures, what wear metals, coolant, sea water and fuel in the oil can mean, and why the trend over several samples matters more than any one number.

Engine Clicks but Won't Crank - Testing the Battery, Cables, Neutral Switch, Solenoid and Starter

A click (or nothing) when you turn the key is usually a power delivery problem, not a dead engine. Work from the battery and cables through the neutral switch, start relay and solenoid to the starter motor using simple voltage-drop tests, and learn how to jump-start safely when gasoline vapor may be around.

Engine Cut-Off Switch (Kill Switch) and Lanyard: The Law, Testing and Daily Use

How the engine cut-off switch (ECOS) and its lanyard or wireless fob work, when federal law requires you to wear it (boats under 26 feet, 3 hp or more, on plane), how to test it before every trip, and why a spare clip aboard matters.

Engine Hour Meters: Why Hours Matter, How to Verify Them and How to Replace a Meter Honestly

Engine hours set your service schedule and a big part of your boat's resale value. Learn the difference between analog meters and engine-computer hours, how to verify the real hours on a used boat, and how to replace a dead or broken meter while keeping an honest record of the old hours.

Engine Overheating - Troubleshooting Guide

Work through the most likely causes of a hot engine or overheat alarm, from a blocked water intake to a worn impeller or stuck thermostat. Acting fast and in the right order can save your engine and often gets you home without a tow.

Engine Room Ventilation: Combustion Air, Blowers and Keeping Salt Out

Inboard engines, diesels above all, breathe huge amounts of air, and a hot or starved engine room quietly costs power, fuel and turbo life. Learn how engine-room air works, how to inspect vents, ducts, fans and salt-spray filters, the warning signs of too little air, and the separate gasoline blower rule.

Engine Starts Then Dies - Troubleshooting Guide

Track down why your boat engine fires up and then stalls, whether at idle, when you shift into gear, or after a few minutes of running. Most causes are in the fuel supply and can be checked with no special tools.

Engine Warning Horn and Dash Lights: What They Usually Mean and What to Do

Learn what a warning horn, beeps or a dash light usually mean on a boat engine, from overheating and low oil pressure to water in the fuel and reduced-power (limp) mode. Find out what to do right away and when to stop the engine. Patterns differ by brand, so match what you hear and see to your owner's manual.

Engine Won't Start or Won't Crank - Troubleshooting Guide

Find out why your boat engine will not turn over or will not fire, starting with the simple things owners miss most, like the kill switch lanyard and battery switch. Many no-starts are fixed at the ramp in minutes without a tow.

EPIRB and PLB Care: Registration, Batteries, Self-Test and Mounting

Keep your 406 MHz emergency beacon ready to work on the worst day of your life. Register it free with NOAA and renew every two years, track the battery and hydrostatic release dates, run the self-test without triggering a false alert, and know what happens after you press the button.

Epoxy and Two-Part Paint Safety: How to Avoid Becoming Allergic

Epoxy and isocyanate-cured paints can make you allergic for life, sometimes after many jobs with no problem at all. Learn how sensitization happens, which gloves and clothing to wear, how to get epoxy off skin without solvents, when you need a respirator, and how to handle sanding dust and leftovers safely.

Ethanol (E10) Fuel Care: Stabilizer, Phase Separation, Fuel Lines and Tank Vents

Keep E10 gasoline from damaging your boat engine. Learn how to use stabilizer, test for water and phase separation, and inspect the fuel lines, primer bulb, anti-siphon valve and tank vent. Most fuel-related breakdowns start with one of these.

Extended Warranties and Service Plans for Boat Engines: Factory Plans vs Third-Party Contracts

Decide whether an extended service plan is worth it: how factory plans such as Mercury Product Protection and Yamaha Y.E.S. differ from third-party contracts, what they usually cover and exclude, why maintenance records decide claims, how deductibles, transfers and cancellations work, and the questions to ask before you sign. Practical guidance, not legal or financial advice.

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.

Financing a Boat: Loan Terms, Survey and Insurance Requirements, Liens and the True Cost of Ownership

Understand a boat loan before you sign: typical terms and down payments, what lenders check, why they want a survey and insurance, how the lien is recorded (Coast Guard preferred mortgage for documented boats, state title for the rest), how the payoff works when you sell, and how to add up the real yearly cost beyond the monthly payment. Practical guidance, not financial advice.

Fishing Line Behind the Prop: How It Ruins Gearcase Seals and How to Catch It Early

Fishing line that wraps behind your propeller can melt into a sharp ring that cuts the prop shaft seals and lets water into the gearcase. Learn the quick after-trip check, how to pull the prop and clear line safely, the signs that a seal is already damaged, and when to get a pressure test.