800-4-SEATOW
Service Locator
Having the right spare parts aboard your boat can help avoid getting stranded by a minor mechanical issue. What you should carry depends on your boat’s engine, fuel system, electrical system, steering setup, and how far you go.
Start by checking your owner’s manuals for the correct part numbers, then put together a kit with items you can safely replace using the tools and knowledge you have. After all, carrying spare parts only helps if they fit your boat and you know how to use them.
Start With the Right Parts for Your Boat
Before purchasing spare parts, make sure you know exactly what your boat needs. Check the make, model, year, and serial number of your engine and other onboard systems. Parts may look similar but have different specifications, so it’s important that you confirm compatibility.
Inspect your engine and other key systems for signs of wear or corrosion that could indicate a part may need replacing soon. This will help you determine which spare parts are worth keeping onboard, so you’re prepared without spending money on items you may never need.
essential Spare Parts to keep on board
Even with regular maintenance, unexpected mechanical issues can happen on the water. Having a few key spare parts on board can help you address minor problems before they turn into bigger ones.
The parts you need will depend on your boat, but the following are worth considering. Just remember that not every repair can or should be made on the water. Always put safety first and know when it’s time to call for assistance.
Fuel Filters and Fuel-Water Separators
A clogged fuel filter or water in your fuel system can result in a loss of power, stalled engine, or no start. Carry replacement fuel filters and fuel-water separator elements to help save time when troubleshooting fuel-related problems.
Spare Fuses
A blown fuse can leave you without navigation lights, electronics, or other onboard systems. Keep a selection of spare fuses that match the types and amperage ratings used on your boat. Never substitute a higher-rated fuse, as this could cause damage and/or create a fire hazard. If a replacement fuse blows again, stop and investigate the underlying issue before trying to replace it again.
Engine Belts
A broken belt can affect critical systems like your alternator or cooling system, potentially leaving you stranded. If your engine uses replaceable accessory belts, carry the correct spares. A replacement belt takes up relatively little storage space and can be valuable if one fails while you’re underway.
raw-water pump impeller
A damaged impeller can restrict cooling water flow and cause the engine to overheat. A spare impeller and any necessary gaskets can be helpful spares, especially on longer trips. If your engine begins overheating, shut it down immediately to avoid more serious damage.
Propeller Hardware
A damaged or missing piece of propeller hardware can bring your day on the water to a halt. Depending on your boat’s setup, consider carrying spare propeller nuts, cotter pins, washers, shear pins, or a replacement hub kit. These small, inexpensive parts are easy to store and can be difficult to find when you’re away from a marina.
Drain Plugs and Seals
A missing or damaged drain plug can allow water to enter your boat, creating a serious safety concern. Keep a spare drain plug that’s the correct size, along with any necessary seals or gaskets. It’s a simple addition to your onboard kit that takes up almost no space.
Hoses and Clamps
A loose or damaged hose can lead to leaks and potentially more serious problems. Keep a few marine-grade hose clamps on board in sizes that fit your boat’s hoses. If you do carry any spare hoses, make sure they’re rated for the intended use, especially for fuel or high-temperature systems.
Bilge Pump Components
Your bilge pump plays an important role in keeping unwanted water out of your boat. Consider carrying a spare fuse, float switch, or replacement pump cartridge. Having these parts available can help you address a malfunction before a minor issue becomes a more serious problem.
Navigation Light Bulbs
Working navigation lights are essential for safe boating after dark and in restricted visibility. If your boat uses replaceable bulbs, keep a few spares on board that fit your fixtures. If you have sealed LED navigation lights that fail, you may need to replace the entire fixture if a light fails.
spark plugs
Worn or fouled spark plugs can cause performance issues in gasoline engines. If your boat has experienced spark plug fouling in the past, having replacements on hand can help you address the problem. Make sure you have the correct plugs and the tools needed to replace them.
Useful Electrical Spares
Beyond fuses and navigation lights, a few basic electrical supplies can help you troubleshoot and address minor issues on the water.
- Battery terminal hardware: Nuts, bolts, and washers that fit your battery connections.
- Marine-grade connectors: Heat-shrink connectors designed for marine use for minor wiring repairs.
- Replacement relays: Manufacturer-recommended relays for critical systems.
- Engine cut-off switch lanyard: A replacement that fits your engine’s cut-off switch in case the original is lost or damaged.
- Marine-grade wire: A small amount of properly sized wire for minor electrical repairs.
Keep in mind that electrical problems aren’t always as simple as replacing a component. Loose connections, corrosion, and damaged wiring can all cause issues that require further attention.
Additional Spare Parts for Sailboats and Specialized Systems
Depending on the type of boat you have, you may need to carry a few unordinary spare parts. Sailboats, diesel-powered boats, and vessels equipped with generators, hydraulic steering, or other specialized systems have components that may require extra attention.
For example, sailboat owners may want to keep spare shackles, blocks, or other rigging hardware on board, while diesel-powered boats may benefit from additional fuel-system components and cooling-system parts. Boats with hydraulic steering need the appropriate hydraulic fluid, while vessels with generators should carry spares recommended by the manufacturer.
The key is to consider which components are most likely to need attention and plan accordingly. Some repairs may require specialized tools or professional assistance, but having the right replacement parts available can help get your boat back up and running sooner.
How Your Boating Plans Affect What You Should Carry
Where you boat and how far you plan to travel can help determine which spare parts you need. A short afternoon cruise close to home may call for fewer spares than a longer trip to a remote area where replacement parts and professional assistance may be harder to find.
Short Local Trips
If you typically boat close to shore or near marinas, focus on the basics. Spare fuses, fuel filters, drain plugs, and a cut-off switch lanyard are good starting points. Having a few commonly needed parts on hand can help you address minor issues without cutting your day short.
Long-Distance or Offshore Trips
Heading farther from shore? Consider bringing additional fuel filters, engine belts, pump components, electrical supplies, and essential fluids appropriate for your boat. It’s also important to prepare for situations where help may take longer to arrive. Make sure you have reliable communication equipment, current navigation information, and a float plan shared with someone onshore.
Older or Recently Repaired Boats
Older boats may have components that are more prone to wear, making it worthwhile to carry spares for parts that have caused problems in the past. If you’ve recently made repairs or upgrades, double-check that the spare parts you’re carrying are still compatible with your equipment.
How to Organize and Store Spare Parts
Keep everything organized in a dry, easily accessible location, and protect sensitive components from moisture, heat, and damage. A few simple tips can help keep your spare parts in good condition:
- Keep parts dry: Use waterproof containers or resealable bags to protect against moisture and corrosion.
- Group similar items together: Organize parts by category, such as engine, fuel, electrical, and plumbing, so they’re easier to locate.
- Keep original packaging: Whenever possible, leave parts in their original packaging to protect them and make identification easier.
- Store fluids properly: Keep engine oil, hydraulic fluid, and other liquids in their original, tightly sealed containers and follow the manufacturer’s storage recommendations.
- Check your supplies regularly: Look for signs of corrosion, moisture, or damage, and replace anything that’s been used or is no longer in good condition.
Make a habit of checking your spare parts at the beginning of each boating season. A little organization now can save you time and frustration when something goes wrong on the water.
have the Right Tools
Spare parts are only half the equation — you’ll also need the right tools to install them. Whether it’s a wrench to change a fuel filter, a socket to replace propeller hardware, or the tools needed to adjust an engine belt, make sure you’re properly equipped. A well-stocked tool kit can make all the difference when something goes wrong on the water.
When to Call for On-Water Assistance
If you’re missing a part, don’t have the tools needed to make a repair, or simply can’t get your boat running safely, it’s time to call for help. Depending on your location and the circumstances, Sea Tow may be able to deliver replacement parts. If the part is unavailable or does not solve the problem, a tow might be necessary. Always call your local Captain first to assess the situation and determine the best next steps for your safety and your vessel.
Frequently Asked Questions
What are the most important spare boat parts?
For most powerboats, spare fuel filters, fuses, engine belts, propeller hardware, and a drain plug are a good starting point. What you should carry ultimately depends on your boat’s engine, onboard systems, and how far you typically travel.
How do I know which fuel filter to buy?
Check your engine owner’s manual for the recommended fuel filter specifications or ask your local marine dealer for help finding the right replacement. Fuel filters are not interchangeable, so it’s important to purchase one that’s compatible with your engine and fuel system.
Can Sea Tow deliver me a boat part?
Depending on your location and the availability of the part, Sea Tow may be able to deliver replacement parts directly to your boat. When requesting assistance, provide as much information as possible about the part you need to help identify the correct replacement.
How often should spare parts be replaced?
Check your spare parts at the beginning of each boating season and before longer trips to make sure they’re free of corrosion, moisture, or damage. Replace anything that’s no longer in good condition, and review your supplies whenever you make repairs or upgrades to your boat.
Be Prepared With the Right Spare Parts
You don’t need to carry every spare part imaginable, but having a few essentials on board can make a big difference when something goes wrong. Focus on the parts that make the most sense for your boat, keep them organized, and make sure you have the tools needed for basic repairs.
While some issues can be handled on the water, others require professional assistance. Knowing what you can safely fix yourself and when to call for help is just as important as having the right spare parts onboard.
Sea Tow Team
Sea Tow has been the premier leader in on-water boating assistance since 1983. We want to share news, press, tips and all things boating.
Updated on: - Created on: