BoatMend

Repair & maintenance guides

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

433 of 509 guides · page 9 of 19

Routine serviceAdvanced

How to Inspect Exhaust Manifolds and Risers on a Sterndrive or Inboard

Cast-iron exhaust manifolds and risers rust from the inside, and when they fail they can let water into the cylinders and ruin the engine. Learn the warning signs, how often to inspect them in salt and fresh water, how to check a riser yourself, and when replacement is a job for a pro.

4 h Sterndrive (I/O), Gas inboard Shop: $1000-3500
Hull & systemsModerate

How to Inspect Sailboat Chainplates for Leaks, Cracks and Hidden Corrosion

Check every chainplate above and below deck for leaks, rust, cracks and a wet deck around it, reseal the ones that leak, and know when the plates need to come out for a proper look. Chainplates tie the mast to the hull, and one hidden failure can bring the rig down.

2 h All engines Shop: $300-2500
SafetyEasy

How to Inspect Sailboat Lifelines, Stanchions and Gates

Check the wire or rope, swaged ends, gate hooks, stanchion bases and pulpits that make up your lifeline system, and know when to replace them. Lifelines keep people aboard, but only if every link is sound, and they are never a place to clip a safety tether.

1 h 30 min All engines Shop: $300-1500
Hull & systemsModerate

How to Inspect Sterndrive Bellows, Gimbal Bearing, U-Joints and Shift Cable

Learn to spot a cracked sterndrive bellows before it lets water into the boat, and to recognize the warning signs of a worn gimbal bearing, U-joints and shift cable. A failed bellows is one of the top reasons boats sink at the dock, and a 20-minute inspection can catch it.

45 min Sterndrive (I/O) Shop: $400-1200
Hull & systemsEasy

How to Inspect Wakeboard Tower, T-Top and Bimini Hardware

Towers, T-tops and biminis carry tow ropes, speakers, boards, electronics and wind loads, all on a handful of bolts. Learn how to check the welds, bases, backing plates, bolts, folding hinges and accessory loads before a crack or a loose bolt becomes an accident.

1 h All engines Shop: $100-400
SafetyModerate

How to Inspect Your Boat's Fuel Tank, Fill, Vent and Hoses

A leaking gas tank is one of the most dangerous problems a boat can have, and it usually starts out of sight. Learn how to inspect portable and built-in tanks, spot aluminum tanks corroding from below, know the ethanol risk for old fiberglass tanks, and check the fill, vent, hoses, clamps and sender, plus why tank replacement is a job for a pro.

1 h 30 min Outboard, Sterndrive (I/O), Gas inboard, Jet boat Shop: $150-400
SafetyModerate

How to Inspect Your Sailboat's Standing Rigging

A step-by-step owner's inspection of the wires, fittings, turnbuckles, pins, chainplates and mast that hold your rig up, plus how to decide when it is time for a rigger and new rigging. Includes what insurers commonly expect for older rigs.

2 h All engines Shop: $300-800
Hull & systemsModerate

How to Inspect, Clean and Replace Vented Loops (Anti-Siphon Valves)

A vented loop is a small, easy-to-forget fitting that stops seawater from siphoning into your engine or through your head and into the boat. Learn where they live, why they must sit well above the waterline, how to clean a sticky or clogged valve, when to replace it, and how to spot the hydrolock damage a failed one can cause.

1 h Gas inboard, Marine diesel, Sterndrive (I/O) Shop: $150-400
TrailerEasy

How to Inspect, Inflate and Replace Boat Trailer Tires

Check your trailer tires the way the pros do: the right type (ST), the right load range, the right cold pressure, and an honest look at their age. Tires are the number one reason boat trailers end up on the side of the highway.

45 min All engines Shop: $40-120
Hull & systemsEasy

How to Install (and Remove) a Keel Guard on a Trailer Boat

An adhesive keel guard protects the bow and keel line of a trailer or beaching boat from sand, rocks and ramps. Learn when it's worth it, how to prep and apply one the way the maker intends, and how to take it off later.

1 h 30 min Outboard, Sterndrive (I/O), Jet boat Shop: $200-500
SafetyModerate

How to Install a Backup Bilge Pump and High-Water Alarm

Add a second, larger automatic bilge pump mounted above the primary, with its own overboard discharge and a loud high-water alarm wired so it works even with the battery switch off, then test it every month so it buys you real time if the boat starts taking on water.

3 h All engines Shop: $400-1000
ElectricalAdvanced

How to Install a Boat Radar Antenna (Radome or Open Array)

Plan and install a radar the right way: choose a mounting spot high enough and clear of obstructions, keep the beam above people's heads, give an open array room to spin, bolt it down with backing plates, route the cable without damaging it and seal every deck pass-through. Know when the job belongs to a certified installer.

8 h All engines Shop: $500-2500
ElectricalModerate

How to Install a Bow-Mount Trolling Motor

Mount a bow-mount trolling motor so it stows and deploys cleanly and stays put: pick the right shaft length and spot, check clearance in every position, through-bolt it with backing, consider a quick-release bracket, and wire it with the breaker, wire size, plug and voltage the motor maker specifies.

4 h All engines Shop: $200-600
Hull & systemsModerate

How to Install an Inspection Port (Deck Plate) in a Deck or Bulkhead

Add a screw-out or pry-out deck plate so you can reach hidden nuts, wiring, hoses and through-hulls, or check a deck core for rot. Learn where it is safe to cut, how to pick and size the port, how to seal a cored deck with epoxy, and how to bed the ring so it never leaks.

3 h All engines Shop: $200-600
ElectricalModerate

How to Install and Set Up Forward-Facing (Live) Sonar

Mount a live sonar transducer such as Garmin LiveScope, Lowrance ActiveTarget or Humminbird MEGA Live on your trolling motor or a pole, give it clean power, route the cable so it survives stow and deploy, and dial in the basic settings. Most "bad picture" and "dead transducer" problems trace back to one of these steps.

3 h All engines Shop: $200-600
Hull & systemsModerate

How to Install EVA Foam Decking (SeaDek-Style Pads) on Your Boat

Closed-cell foam decking makes a hard fiberglass deck grippy and comfortable underfoot. Learn when a peel-and-stick DIY job makes sense, how to template, cut and prep, the temperature and gap rules, how to lay pads without trapped air, and how to clean, repair and eventually remove them.

4 h All engines Shop: $500-5000
Routine serviceEasy

How to Keep a Boat Maintenance Log and Organize Your Receipts

Set up a simple maintenance log that records the date, engine hours, work done, parts and who did it, and keep receipts and photos organized. Good records help with warranty and insurance claims, show buyers the boat was cared for and reveal wear patterns before something fails.

1 h All engines
Hull & systemsModerate

How to Keep a Dry Bilge, Including Dry Bilge Pump Systems

Standing water in the bilge causes odors, mildew and corrosion, and hides new leaks. Learn why your main pump leaves water behind and how to get rid of the last inch: cut the sources, clear limber holes, route AC condensate and showers to a sump, and add a small self-priming diaphragm pump if needed.

4 h All engines Shop: $300-900
SeasonalEasy

How to Keep Mice and Rodents Off Your Stored Boat

Mice love a stored boat: dry, quiet and full of soft nesting material and tasty wire insulation. Learn how to remove what attracts them, close their way in, choose deterrents and traps that actually work, avoid the risks of poison, and check the wiring safely in spring.

1 h 30 min All engines Shop: $150-1500
Hull & systemsEasy

How to Keep Your Boat Fridge, Freezer or Icebox Cold (and Off Your Batteries' Back)

Most boat fridge problems are not a dead compressor: they are trapped heat, low voltage, leaky seals or too much frost. Learn the owner checks for air-cooled, water-cooled and keel-cooled units, how to estimate power draw, and how to store the system for winter.

1 h All engines Shop: $150-800
SeasonalModerate

How to Keep Your Boat in the Water Over Winter (De-Icers, Covers and Checks)

Wintering afloat can be safe if you still winterize every water system, keep the bilge pump and batteries working, use a de-icer correctly on a GFCI-protected circuit, respect the shock and thin-ice risks, and visit the boat regularly.

4 h All engines Shop: $400-2000
TrailerModerate

How to Launch and Retrieve Your Boat Alone

A repeatable routine for putting a trailer boat in and taking it out by yourself: what to do in the staging area, how to rig one long line so you can control the boat from the dock, when power loading is off-limits, and the safety habits that keep you, your boat and the next boater out of trouble.

30 min All engines
Hull & systemsModerate

How to Lift or Jack a Pontoon Safely on the Trailer or the Ground

Raise a pontoon a few inches to rinse and inspect the tubes, drain them, adjust bunks or set it on storage blocks without bending a tube or getting hurt: where it can and can't take a jack, how to spread the load, why you block as you lift and never go under it, and when a dealer's forklift or lift is the right tool.

1 h 30 min All engines Shop: $100-300
SafetyEasy

How to Load Your Boat Safely: Capacity Plate, Balance and Stability

Too much weight, or the right weight in the wrong place, is behind most small-boat capsizes and swampings. Learn to read the capacity plate (persons, weight and horsepower), add up your real load, balance it side to side and fore and aft, and adjust for rough water, water aboard and towing riders.

20 min All engines

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.