Repair & maintenance guides

How to Prevent and Remove Scale in Marine Toilet Discharge Hoses

A head that gets harder to pump, flushes slowly or lets water creep back into the bowl often has mineral scale building up inside the discharge hose. Learn a simple monthly vinegar routine, when to use a maker-approved descaler, what never to pour in, and when replacing the hose or switching to a freshwater flush is the real fix.

How to Protect Your Boat, Motor and Trailer From Theft

Practical, layered security for boat owners: outboard locks, trailer coupler and wheel locks, disabling the boat, GPS trackers, engraving and marking, photo and serial number records, safer storage, and exactly what to report (HIN and serial numbers) if your boat is stolen.

How to Re-Caulk Teak Deck Seams (and When the Deck Is Beyond Saving)

Spot failing teak deck seams, reef out the old caulk, prep and bond-break the seams, lay in a teak-specific caulk and sand it flush. Done right, fresh seams stop deck leaks and add years to the deck; this guide also shows the signs that a deck is too worn to recaulk.

How to Re-Cover Boat Cushions and Seats (DIY Sewing vs. Upholstery Shop)

Cracked, faded or split cushion covers can be replaced without buying new seats. Learn how to choose marine vinyl or acrylic fabric, which thread survives the sun, how to use the old cover as a pattern, where zippers and drain vents go, and when a walking-foot machine at home makes sense versus paying an upholstery shop.

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 Rebuild a Manual Marine Toilet (Hand-Pump Head)

A manual head that's hard to pump, lets water flow back into the bowl or leaks at the pump shaft usually just needs new valves and seals. Learn how to diagnose the symptom, pick the right service kit, replace the joker valve, flapper and piston seals safely and hygienically, and keep the pump working afterward.

How to Refuel a Boat Safely (Gas Dock, Gas Station and Portable Tanks)

A step-by-step fueling routine that keeps gasoline vapor out of your bilge and fuel out of the water: shut everything down, close up, keep the nozzle in contact, stop short of full, ventilate, run the blower and sniff before you start. Includes portable tanks, personal watercraft and what to do about a spill.

How to Remove and Apply Boat Names, Graphics and Registration Decals

Take off old vinyl names and graphics without scratching the gelcoat, clean up the glue and the "ghost" outline, then apply new lettering straight and bubble-free, and display your registration numbers the way federal rules require.

How to Remove and Reinstall a Sterndrive for Service

Pulling the drive off an Alpha-style sterndrive opens up the bellows, gimbal bearing, U-joints and engine alignment for inspection. Learn when it's a realistic DIY job and when to leave it to a shop, the overall sequence, what to inspect while it's off, and how to put it back without sinking the boat or wrecking the coupler.

How to Remove and Reinstall an Outboard Gearcase (Lower Unit) Without Losing Shift

Dropping the lower unit is the first step of every outboard water pump job, and the reinstall is where most DIY trouble starts: no forward gear, no cooling water or a driveshaft that will not seat. Learn how to set the shift position, protect the water tube, line up the splines and test everything before the boat goes back in the water.

How to Repair or Repaint Worn and Cracked Non-Skid Decks

Bring back grip where the molded non-skid is chipped, cracked, patched or worn smooth. Choose between a molded patch that copies the original pattern, non-skid paint with grit, or textured gelcoat, fix the cracks and soft spots underneath first, and mask for clean, safe edges.

How to Repair or Replace Vinyl Flooring on a Pontoon or Bowrider

Fix small tears, lifted seams and bubbles in marine vinyl or woven vinyl flooring with the right adhesive, tell when a soft spot means the plywood underneath is rotting, and understand what a full floor replacement involves. Structural deck and stringer repairs are pro work.

How to Repair or Replace Your Boat's Rub Rail

Replace a torn rub rail insert or the whole rail, reseal the hull-to-deck joint and its fasteners while the rail is off, and stop the deck-joint leaks that often hide behind a worn rail.

How to Repair Small Gelcoat Chips and Scratches

Fill and blend small chips, dings and scratches in your boat's gelcoat with a repair kit so they stop letting water into the fiberglass and look close to new. Also learn to spot damage that is structural and needs a pro.

How to Repair Torn-Out Canvas Snaps, Fasteners and Zippers

Fix snaps that have pulled out of your bimini, cover or enclosure, reinforce the torn fabric, choose the right snap metal and setting tool, free stuck snaps, replace Lift-the-Dot and twist fasteners, and swap a worn zipper slider.

How to Replace a Fuel/Water Separating Filter (and Check for Water in Your Fuel)

Swap the spin-on fuel/water separator on your gas boat and learn to spot water and ethanol phase separation before it stalls the engine. It is one of the cheapest jobs on the boat and one of the best protections for a fuel-injected engine.

How to Replace an Outboard Fuel Line and Primer Bulb

A cracked hose or a stiff primer bulb can leak gasoline, starve your engine or shed rubber into the fuel. Learn how to choose Coast Guard-rated fuel hose, the right connectors for your engine brand and good stainless clamps, install the bulb pointing the right way, leak-test the job and get rid of the old parts safely.

How to Replace Boat Battery Cables the Right Way

Swap corroded, cracked or undersized battery cables for tinned marine cable sized from a chart for its real length and load, with crimped lugs, adhesive heat shrink, terminal boots, solid support and a fuse close to the battery.

How to Replace Cleats, Eyes and Brackets on a Riveted Aluminum Boat

Swap or add cleats, tie-down eyes, rod holders and accessory brackets on an aluminum boat without starting corrosion or new leaks. The keys are isolating stainless from aluminum, picking the right rivet or bolt, and spreading the load.

How to Replace Folding Boat Seat Hinges and Fix Back-to-Back Seats

Fix flip-up seats, fold-down fishing seats and back-to-back lounge seats that sag, jam or rip loose. Replace rusted or bent hinges with stainless hardware, rebuild a rotten plywood base so the new screws actually hold, and adjust the latches so the seat stays put.

How to Replace Gas Struts on Boat Hatches, Seats and Consoles

Measure, buy and fit the right gas struts (lift supports) so hatches, seat lids and console doors stay open safely instead of dropping on your head or fingers.

How to Replace Marine Speakers (Including Tower Speakers)

Pick replacement speakers that fit the cutout, match your stereo or amplifier's power and impedance, survive sun and spray, and don't throw off your compass. Then wire them with the right polarity and seal them so water can't reach the back.

How to Replace or Re-Cover a Bimini Top

Decide whether you need new canvas or a whole new top, measure your frame the right way, pick a fabric that will last in the sun, check the frame and hardware, and swap the canvas yourself or brief a canvas shop.

How to Replace Sailboat Lifelines with Dyneema or Swageless Wire Terminals

Replace worn lifelines yourself, either with spliced Dyneema-type rope and lashings or with stainless wire and mechanical (swageless) or hand-crimped terminals, and get the measuring, chafe protection, tension and follow-up inspections right.