Repair & maintenance guides

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 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.

How to Replace the Carpet on a Pontoon Boat

Strip worn pontoon carpet and old glue, check the plywood underneath for rot before it gets covered again, choose between marine carpet, snap-in carpet and vinyl, then glue, trim and finish the new floor so it lasts. Most owners need a few dry weekends; soft or rotten decking is a bigger job.

How to Replace the Water Pump Impeller

Replace the rubber impeller that pumps cooling water through your engine, the part most often behind overheating. On many outboards it is a two-hour driveway job that saves a shop bill of several hundred dollars and prevents far costlier heat damage.

How to Run New Wires Through a Boat (Chase Tubes, Pull Lines and Deck Penetrations)

Get a new transducer cable, light or power wire from the stern to the helm or up through the deck without a fight: use the chase tube and a fish tape or pull string, protect the wire from chafe and heat, support it every 18 inches, seal every penetration and label both ends.

How to Sea Trial Your Boat After Maintenance or Repair

A step-by-step test run after service work: dock checks first (leaks, fluids, steering, kill switch), then a gradual climb through the RPM range while you watch temperature and pressure, a wide-open-throttle check against your engine's spec, shifting and trim tests, and a bilge check afterward. Catch a loose clamp or a missed step at the dock, not miles out.

How to Service Sailboat Winches (Clean, Oil the Pawls, Grease the Gears)

Take your sheet and halyard winches apart, clean out old grease and salt, oil the pawls, lightly grease the gears and bearings, and put them back together. A serviced winch turns easily and, more importantly, its pawls catch every time so the drum can't spin backward under load.