Repair & maintenance guides

Isolation Transformer vs. Galvanic Isolator: Which Does Your Boat Need?

Understand how a galvanic isolator and an isolation transformer each protect a boat on shore power, when the heavier, pricier transformer is worth it (stray-current marinas, aluminum boats, liveaboards), and what to ask the ABYC-certified electrician who installs it.

Jet Outboard Care: Grease, Intake Grate, Impeller Clearance and Shallow-River Habits

A jet outboard trades the propeller and gearcase for a pump, so it needs different care. Learn how mounting height works, why the pump bearing needs frequent grease, how gravel and a worn impeller steal thrust, how to clear the intake safely, and when an adjustment is a shop job.

Jet Ski and Jet Boat Pump Care: Clearing the Intake Grate and Checking the Impeller and Wear Ring

Clear weeds, rope and rocks from the intake grate of a Sea-Doo, Yamaha WaveRunner, Kawasaki Jet Ski or jet boat, and learn to spot a damaged impeller or worn wear ring. A clogged or worn pump is the usual reason a jet craft revs high but goes slow.

Jet Ski Electrical Problems: Dies in Waves, Low Voltage and Bad Connections

A personal watercraft that cuts out when it hits chop, shows low voltage, flickers its display or blows fuses usually has a corroded or loose connection, not a dead computer. Work from the battery and grounds to fuses, relays and module plugs, and learn when the job needs a dealer's diagnostic tool.

Jet Ski Hull Care and Repair: Scratches, Gouges, Keel Guards and Beaching Damage

Learn to tell cosmetic scratches from real hull damage on a personal watercraft, which fixes work on fiberglass versus Sea-Doo's Polytec plastic hulls, how a keel guard helps, and when a crack is a job for a pro.

Jet Ski Impeller and Wear Ring Replacement (What's Involved)

Know when your PWC's impeller or wear ring is worn out, how to check it yourself, and what replacing them really involves: pulling the pump, special tools, the right clearance, fresh seals and the correct pump lube. Most owners do the diagnosis and leave the pump work to a dealer or jet-pump shop.

Jet Ski Intake Clogged with Weeds, Rope or Rocks: How to Clear It Safely

Engine revs high but the jet ski barely moves, or an overheat warning comes on? Something is probably stuck in the intake. Learn the symptoms, how to use iDF and similar features, how to clear the grate safely in the water, on the beach or on the trailer, and how to keep it from happening again.

Jet Ski Saltwater Care: Flushing, Rinsing, Corrosion Protection and Storage

A simple after-every-ride routine for Sea-Doo, Yamaha WaveRunner and Kawasaki Jet Ski owners who ride in salt or brackish water. Flush in the right order, rinse the pump, hull and engine bay the gentle way, spray anticorrosion only where it belongs, and keep anodes, the battery and the trailer from rotting away.

Jet Ski Taking On Water: Find the Leak and Drain It Safely

A little water in a personal watercraft's hull after a ride is normal; a lot is not. Learn how to tell the difference, drain the hull, and track the leak from the easy causes (drain plugs, seat and hatch seals, loose hose clamps) to the serious ones (driveshaft seal, exhaust, hull cracks), and when to stop riding.

Jet Ski Won't Start or Won't Beep: A Step-by-Step Check

Most personal watercraft that refuse to start have a simple cause: the key or lanyard, a weak battery, a blown fuse, a security lock or a flooded engine. Work through these checks from the cheapest to the most involved and learn what each result means for Sea-Doo, Yamaha and Kawasaki models.

Keeping Chartplotter Charts and Software Current (Garmin, Raymarine, Simrad, Lowrance, Navionics, NOAA)

Old charts can show buoys that moved and shoals that grew. Learn how chart subscriptions and updates work across the big brands, where NOAA's free charts fit in, how to handle SD cards safely, how to back up your waypoints and routes before anything goes wrong, and a simple yearly routine.

Lake Engine Restrictions: Two-Stroke Bans, Horsepower Limits, Electric-Only and No-Wake Lakes

Some lakes ban older two-stroke outboards, cap horsepower, allow only electric motors, or make the whole lake no-wake. Learn the common types of rules (with dated real examples like Lake Tahoe and Ohio's lake list), how to tell what kind of engine you have, and how to check before you tow the boat three hours to a ramp you can't use.

Launch Day and Haul-Out Checklist for Trailer Boats

A step-by-step checklist for getting your boat off the trailer and back on again safely and quickly, from the drain plug and tie-downs to the blower and ramp etiquette. Following it in order prevents the classic mistakes that sink boats and back up the ramp.

Lightning and Your Boat: Protection, Storm Safety and After-Strike Inspection

How lightning damages boats, what a professionally installed protection system (ABYC and NFPA 780 guidance) can and cannot do, what to do when a storm catches you on the water, and a step-by-step inspection checklist after a strike, including the haul-out, compass, electronics, through-hulls and the insurance claim.

Losing Coolant With No Visible Leak? How to Pressure Test a Closed Cooling System and Its Cap

When the coolant level keeps dropping and you can't find a drip, a simple hand-pump pressure tester can show where it's going. Learn how to test the system and the pressure cap safely on a cold engine, isolate the heat exchanger and coolant-heated appliances, and recognize the signs of a head gasket or internal leak that need a mechanic.

Loss of Power, Hesitation or Misfire - Troubleshooting Guide

Figure out why your engine bogs down, stumbles, will not reach full rpm or runs rough. Work from simple checks like trim, prop and fuel filter to ignition and engine protection modes before paying for diagnostics.

Low-Voltage Disconnects: Keep the Stereo and Fridge from Killing Your Battery

A low-voltage disconnect (LVD) automatically cuts non-essential loads like the stereo, fridge and cabin lights before they drain the battery you need to start the engine. Learn how these devices work, which loads belong behind one and which never do, how to pick the cut-off point for lead-acid or lithium, and how to install one safely.

Make a Fire Escape Plan for Your Boat: Exits, Extinguishers, Roles and Shutoffs

Map two ways out of every cabin, put extinguishers where you can actually reach them, assign who does what, and practice shutting off fuel and power and getting everyone off upwind. A boat fire leaves only a few minutes, so the plan has to be made and walked through before you need it.

Make Your Own Boat Wiring Diagram

Trace your boat's 12-volt circuits one wire at a time, label them so the labels last, and draw a simple diagram you keep aboard. It takes a few weekends, but it turns every future electrical problem or upgrade into a faster, cheaper job.

Man-Overboard Recovery Gear: Throwables, Lifesling, Ladders and MOB Alarms

Set up and check the gear that gets a person in the water back aboard - a throwable within reach, a floating rescue line or Lifesling-style sling, a boarding ladder someone in the water can pull down, and MOB alarms or AIS beacons - and practice the drill so it works when it counts.

Marina and Storage Liens: How Lien Sales Work, Buying a Lien-Sale Boat, and Not Losing Yours

How unpaid slip, storage or repair bills turn into a lien and then a sale, using Florida and California as examples; what an owner can do to stop it; and how a buyer checks that a lien-sale or abandoned boat comes with paperwork the state will actually title. Every state has its own process and deadlines, so confirm with your state agency.

Marina Slip and Storage Contracts: What to Read Before You Sign

Walk through a slip, mooring or winter storage contract clause by clause: insurance and additional-insured requirements, hold-harmless and waiver-of-subrogation language, liveaboard and work rules, DIY and outside-contractor limits, storms, termination, refunds and lien rights, plus the questions to ask the marina and your insurer. Practical guidance, not legal advice.

Marine Battery Care: Test, Charge and Store for Winter

Check your boat battery's health, charge it the right way for its type (flooded, AGM or lithium), and store it so it is ready in spring. Most "boat won't start" calls start with a neglected battery.

Marine Diesel Service: Oil Change, Fuel Filters and Bleeding Air

Change the oil and oil filter, replace the primary and secondary fuel filters, and bleed air from the fuel system on a Yanmar, Volvo Penta, Beta, Cummins or similar marine diesel. These three skills cover most routine diesel care and can get you out of trouble when the engine dies on a passage.