Repair & maintenance guides
Plain-English, step by step, written for owners. Pick your engine to see the guides that apply to it.
303 of 509 guides · page 5 of 13

How to Care for Your Anchor Locker and Keep the Chain Running Free
Empty, clean and drain the anchor locker, untwist and restow the rode so it runs out without jamming, tie the bitter end so it can be cut free in an emergency, and decide whether you really need a swivel. A tidy locker keeps the anchor ready when you need it fast.

How to Check a Holding Tank Vent and Replace the Vent Filter
A blocked holding tank vent makes the head gurgle, pressurizes the tank every flush and can collapse it at the pump-out dock. Learn the warning signs, how to clear the vent fitting and hose, when and how to replace the carbon vent filter, and how to keep insects and overfills from plugging it again.

How to Check and Care for Boat Trailer Surge Brakes
Understand how the hydraulic surge brakes on your boat trailer work, check the fluid, use the reverse lockout correctly and rinse salt out of them after every dunk. Simple habits that keep the brakes from seizing, dragging or failing when you need them.

How to Check, Mount and Replace Boat Fire Extinguishers
A monthly five-minute check of every fire extinguisher aboard, plus how the 2022 Coast Guard rule changes affect you, where to mount them, and when to recharge or replace. A boat fire spreads in seconds, and an extinguisher with a dead gauge, missing pin or expired date will not help you or pass a boarding.

How to Choose and Fit Life Jackets for Children and Babies
Pick the right Coast Guard-approved life jacket for each child by weight, check the fit so it can't slip off, look for head support and a crotch strap on little ones, and learn the federal and state wear rules. Inflatables are not for kids, and a life jacket never replaces an adult watching.

How to Choose, Install and Adjust Trailer Guide-Ons (Posts or Bunks)
Add or tune the side guides on your boat trailer so the hull lines up in wind and current, the posts stay visible at the ramp and nothing rubs the gelcoat on the road. Covers post vs. bunk guide-ons, lighted posts, mounting height, side clearance and yearly care.

How to Choose, Install and Maintain an Onboard Battery Charger
Pick the right marine charger for your batteries (how many banks, how many amps, flooded, AGM or lithium), mount and fuse it safely, set the charge profile, and use it to keep batteries healthy all season and through the winter. The AC (shore power) side is a job for a marine electrician.

How to Clean and Care for a Boat Windshield (Acrylic, Polycarbonate or Glass)
Clean your windshield without scratching it, tell acrylic, polycarbonate and glass apart, deal with haze, crazing and small cracks, stop frame leaks, and keep wipers and the walk-through door working.

How to Clean and Care for Clear Vinyl (Isinglass) and Polycarbonate Enclosure Panels
Keep the clear windows in your dodger, bimini curtains or full enclosure clear for years by cleaning them the right way, storing them without scratches and avoiding the cold-weather and chemical mistakes that ruin them. Covers soft clear vinyl, coated vinyl like Strataglass, rigid panels and zippers.

How to Clean and Protect Boat Canvas, Bimini Tops and Vinyl Seats
Wash your bimini, covers and enclosure the right way, beat mildew without wrecking the stitching, keep vinyl seats soft and stain-free, look after zippers and snaps, and store everything so it comes out clean next spring.

How to Clean and Sanitize Your Boat's Freshwater Tank and Lines
Get rid of slime, stale taste and smells in your boat's drinking water system. Scrub the tank through the inspection port if you can, sanitize the tank and every line with the right dose of plain bleach, then flush until the water tastes clean again.

How to Clean the Raw-Water Strainer and Replace the Impeller on a Marine Diesel
Clean the sea strainer and swap the rubber impeller in the raw-water pump of a Yanmar, Volvo Penta, Westerbeke, Beta or similar inboard diesel. A worn impeller is one of the most common reasons a diesel overheats, and this job takes about an hour with basic tools.

How to Clean Your Boat's Bilge (Legally, and Without the Smell)
Get oil, sludge and debris out of the bilge without pumping pollution overboard, choose absorbents that actually work, track down bilge odors, clear limber holes and the pump pickup, and dispose of the mess the right way.

How to Clean, Brighten and Protect Aluminum Pontoon Tubes
Get scum lines, algae, mineral stains and dull oxidation off your pontoon tubes without hurting the metal, the finish, you or the lake. Learn when mild soap is enough, when an acid brightener makes sense (and how dangerous some are), why painted and anodized tubes need different care, and how to polish and seal bare aluminum so it stays clean longer.

How to Clean, Protect and Inspect Stainless Steel Boat Hardware
Remove tea stains and rust from rails, cleats and fittings without scratching them, passivate stainless so it stays clean longer, understand why 304 and 316 behave differently, and spot the hidden crevice corrosion that weakens fittings from underneath.

How to Clean, Protect and Restore Non-Skid Decks
Get dirt, fish blood, rust and mildew out of textured non-skid without wearing it away, learn why ordinary wax makes it dangerously slick, and decide when worn non-skid needs a deck paint with grip additive or traction pads instead.

How to Clean, Remove Oxidation and Wax Your Boat's Gelcoat (Plus Pontoon Tubes)
Wash your hull the right way, bring back chalky, faded gelcoat with compound, and seal it with wax so it stays glossy and protected from the sun. Includes how to clean and protect the aluminum tubes on a pontoon boat.

How to Detail Your Boat's Interior (Vinyl Seats, Carpet, Storage and Drains)
Give your cockpit and cabin a proper detail. Clean marine vinyl without stripping its UV protection, wash snap-in and glued-down carpet, clear out cup holders, storage boxes and their drains, beat mildew and pink stains, and know which household cleaners to keep off your boat.

How to Dry or Replace Waterlogged Boat Seat Cushion Foam
Stop the soggy-seat problem: find out why the foam inside boat cushions holds water, dry it out the fast way, and choose the right replacement foam (standard, closed-cell or quick-drying reticulated) so your seats stay dry, firm and mildew-free.

How to File a Boat Insurance Claim: Safety, Mitigation, Documentation and Settlement
What to do from the moment something goes wrong until the check arrives: make everyone safe, stop further damage, report right away, document with photos and your maintenance log, handle towing versus salvage, work with the adjuster or surveyor, and understand agreed value, actual cash value and the common exclusions. Policies differ, so your own policy wording always wins.

How to File a Float Plan: What to Include, Who Gets It and What They Do If You're Late
A float plan is a short written trip plan you leave with someone ashore, not with the Coast Guard. Fill in the free USCG Float Plan or the Coast Guard app, agree on a firm 'call for help by' time, check in when plans change, close the plan when you're home, and give your shore contact clear steps for reporting you overdue.

How to Fill Old Screw Holes in Fiberglass Decks and Hulls
Close up the holes left by removed cleats, rod holders, electronics and trim so water can't reach the deck core. Covers simple epoxy fills, the overdrill-fill-redrill method for cored decks, a gelcoat finish, and why holes below the waterline are a haul-out job.

How to Find a Leak When Water Gets Into a Pontoon Tube
A pontoon that sits low on one side, lists or sloshes when you rock it probably has water in a tube. Learn how to confirm it, drain it, track down the pinhole or cracked weld, and choose between a temporary patch and a proper weld repair.

How to Find and Fix Corroded Electrical Connections on a Boat
Track down the green crust and loose terminals behind flickering lights, dead gauges and slow cranking with a simple voltage-drop test, then remake the connection the marine way: tinned wire, a proper crimp, adhesive-lined heat shrink and a protective coating.
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.