BoatMend

Repair & maintenance guides

Plain-English, step by step, written for owners. Pick your engine to see the guides that apply to it.

444 of 509 guides · page 15 of 19

TroubleshootingEasy

Overheat Alarm: What to Do in the First 60 Seconds

A short, practiced routine for the moment the temperature alarm goes off: take the load off, look for cooling water, shut down if it isn't there, and check every space the exhaust runs through for heat or fire. Based on a June 2026 Coast Guard safety alert about a fatal fire that started with an overheat alarm.

15 min Outboard, Sterndrive (I/O), Gas inboard, Marine diesel
Buying & ownershipModerateDraft

Owning a Boat in an LLC or Trust: Reasons, Registration, Coast Guard Documentation, Taxes and Insurance

Why some owners put a boat in an LLC or a trust, what it does and doesn't do for liability, how it changes state titling and Coast Guard documentation, why states go after out-of-state LLC tax schemes, and how to keep the insurance, loan and paperwork lined up. General information, not legal or tax advice.

2 h All engines
Buying & ownershipModerate

Planning a Repower: Horsepower Limits, Transom, Rigging, Prop and Costs

Putting a new engine on a boat you love can cost far less than a new boat, but only if the plan is right. Learn how to read the capacity plate for maximum horsepower and weight, check the transom, sort out controls, gauges and rigging, budget for the prop and the extras, and decide between a dealer installation and doing it yourself.

4 h Outboard, Sterndrive (I/O) Shop: $5000-40000
SafetyEasy

Portable Gas Cans and Fuel Storage: Filling, Storing at Home and Aboard, and Getting Rid of Old Gas

Gas cans and portable boat tanks are handy and dangerous in equal measure. Learn what makes a modern can compliant, why you always fill it on the ground, how to store gasoline at home and on the boat, how long ethanol fuel really lasts, and how to dispose of old gas legally.

30 min Outboard, Jet ski / PWC
Routine serviceEasy

Portable Toilets on Boats: Emptying, Chemicals, Odor, Seals and Winter Storage

A portable toilet (Porta Potti type) is the simplest legal head for a small boat, as long as it is emptied the right way. Learn where to dump it, which chemicals to use, how to stop odor and leaks, how to secure it aboard, and how to store it for winter.

30 min All engines
ElectricalModerate

Power Trim Only Goes Up or Only Down: Relays, Switches and Wiring

When your outboard or sterndrive trims one way but not the other, the cause is usually electrical: a relay, a switch, a corroded plug or a wire. Learn how the up and down circuits work, how to swap-test the relays, how to tell the helm switch from the cowl switch, and how to tell an electrical fault from a hydraulic one.

1 h Outboard, Sterndrive (I/O) Shop: $150-600
Hull & systemsModerate

Power-Lift Kicker Brackets: Wiring, Waterproofing and Actuator Care

An electric kicker lift raises and lowers your trolling motor at the push of a button, but its actuator, relay and wiring live in the wettest spot on the boat. Learn how to check the load rating, wire and fuse it properly, keep water out of the actuator, grease and fog it the way the maker says, and what to do when it won't move.

3 h Outboard Shop: $400-1200
SafetyEasy

Powered Winch and Windlass Safety: Keep Fingers Clear and Power Within Reach

Electric and hydraulic winches and anchor windlasses can crush hands and pull a person into the drum in seconds. Learn where switches and the emergency power cutoff belong, how to keep hands and lines safe, why the windlass should never hold the boat, and how to brief your crew.

1 h All engines Shop: $150-600
ElectricalAdvanced

Powering a Big Boat Sound System: Amplifier Draw, an Audio Battery and Charging

Work out how much current your amplifiers really pull, size a dedicated audio battery, keep it charged with an automatic charging relay or isolator, and fuse and wire it so a long day of music never leaves you unable to start the engine.

5 h All engines Shop: $400-1500
TroubleshootingModerate

Prop Ventilation vs. Cavitation - Why Your Engine Revs Up and the Boat Loses Grip

Sudden RPM spikes, blowouts in turns, or a prop that slips when you accelerate are usually ventilation, not cavitation. Learn to tell them apart, then work through the fixes in order: trim, load, prop damage, the hull ahead of the prop, engine height, and finally a different prop.

1 h Outboard, Sterndrive (I/O)
SafetyEasy

Propane (LPG) Safety on Boats - Locker, Solenoid, Sniffer and Leak Test

Learn why leaking propane sinks into the bilge, how to inspect the locker, cylinders, hoses, solenoid and gas alarm, and how to run a simple leak test. Repairs to a propane system belong to a qualified marine technician.

45 min All engines Shop: $150-400
Routine serviceEasy

Propeller Care: Inspect, Remove, Replace and Choose the Right Pitch

Check your prop for damage, pull it to clear fishing line and grease the shaft, reinstall it correctly, and learn how pitch affects your engine's wide-open-throttle RPM. The right prop in good shape protects your engine and often makes the boat run better and use less fuel.

45 min Outboard, Sterndrive (I/O) Shop: $50-150
Hull & systemsModerate

Protecting a Docked Boat: Mooring Whips, Bumpers, Fender Boards and Chafe Gear

Set up your dock or slip so wakes, wind and tides don't grind your hull against it, using mooring whips, dock bumpers, fender boards, spring lines and chafe gear, and know what these can and can't do in a storm.

4 h All engines Shop: $250-1500
Rules & seamanshipEasy

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.

30 min All engines
Rules & seamanshipEasyDraft

Reading NOAA Tide and Current Predictions for Trip Planning (MLLW, Slack Water and Bridge Clearance)

Tide is the water going up and down; current is the water moving sideways, and their timing doesn't always line up. Learn to find the right NOAA station, read high and low tides against chart datum (MLLW), find slack water and peak current, check bridge clearance against mean high water, and plan launches, anchoring and inlet crossings around them.

20 min All engines
SafetyEasyDraft

Reading Your Boat's Capacity Label (Old and New 2026 Format) and What It Means for a Repower

Learn to read every line of your boat's capacity plate, including the new ABYC S-7 label the Coast Guard accepted in July 2026 with its maximum outboard motor running weight, and use it to check a load or a repower before you spend money. Practical guidance, not legal advice.

30 min Outboard, Sterndrive (I/O), Gas inboard
ElectricalModerate

Recreational Radar Care: Radome and Open-Array Cleaning, Mounts, Cables and Alignment

Keep your boat's radar seeing small targets by cleaning the radome or open array the right way, checking the mount, cable and connectors for corrosion, and confirming that targets line up with the bow. Includes the safety rules for working near a radar that might transmit, plus winter care.

1 h 30 min All engines Shop: $150-500
Rules & seamanshipEasyDraft

Releasing Deep-Water Fish with Barotrauma: Descending Devices, Venting and the Federal Gear Rules

Snapper, grouper and other bottom fish reeled up from deep water often float off with bulging eyes and a swollen belly. A descending device sends them back down to where the pressure fixes the problem. Here's what federal rules require in the South Atlantic and Gulf (and what changed in 2026), how to rig and use a descender, and where venting fits.

15 min All engines
ElectricalModerate

Remote Boat Monitoring: Bilge, Battery, Shore Power and GPS Alerts on Your Phone

Choose, install and set up a system that texts you when your unattended boat is taking on water, losing battery or shore power, or moving without you. Covers cellular versus satellite, what each sensor really tells you, wiring it so it stays on, sensible alert settings and what happens to your location data.

3 h All engines Shop: $250-900
TroubleshootingModerate

Remote Control Box Troubleshooting: Stiff Lever, Won't Crank, Trim Switch

The throttle and shift control at the helm (side-mount or binnacle) takes a beating. Learn how to find out why the lever is stiff, why the engine will not crank even with a good battery, why the trim button on the handle quit, and when the whole control box should be replaced along with its cables.

1 h 30 min Outboard, Sterndrive (I/O), Gas inboard Shop: $150-1200
Buying & ownershipEasy

Renaming a Boat: Paperwork, Removing the Old Name and the Optional Ceremony

Change your boat's name the right way: what a state-registered boat needs versus a Coast Guard documented boat (name change and hailing port go through the NVDC before you letter the hull), getting every trace of the old name off, lettering rules for documented boats, who else to tell (insurer, marina, MMSI, EPIRB, AIS), and the traditional renaming ceremony if you want the fun.

4 h All engines Shop: $150-600
Buying & ownershipModerateDraft

Renting Out Your Boat on Peer-to-Peer Apps: Insurance, Bareboat vs. Captained, State Rental Laws, Taxes and Wear

Thinking of listing your boat on a peer-to-peer rental platform to offset ownership costs? Learn why your personal policy probably won't cover it, what platform insurance does and doesn't do, the legal difference between a bareboat rental and a captained trip, state livery laws like Florida's, how rental income is taxed, and the real cost of extra hours and wear. Practical guidance, not legal, tax or insurance advice.

1 h 30 min All engines
TrailerAdvanced

Replacing a Boat Trailer Axle: When You Need One and How to Order the Right Size

A bent, rusted-through or undersized axle can't be fixed with new bearings. Learn the signs, the difference between straight, drop and torsion axles, the measurements a supplier needs (hub face, spring centers), what to specify for saltwater, and why this is usually a trailer-shop job.

5 h All engines Shop: $400-1500
Hull & systemsAdvanced

Replacing a Built-In Boat Fuel Tank: What's Involved and Why It's Usually a Pro Job

A leaking built-in gas tank is a fire and explosion risk that has to be fixed, not patched. Learn the signs a tank needs replacing, why foamed-in aluminum tanks corrode, what a compliant replacement tank and label look like, how access, grounding, hoses, vents and foam should be handled, and how to plan and check the work.

8 h Outboard, Sterndrive (I/O), Gas inboard, Jet boat, Marine diesel Shop: $1500-6000

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.