Our Services

20-Hour Check

Many engine manufacturers recommend a 20 hour or “Break In” service, including Mercruiser and Yamaha. This service includes changing engine and drive oil and inspection/adjustment of the engine and drive train to ensure proper break in and wear.

Battery Replacement

We offer Battery Load testing services to check the health of your batteries.  We can remove batteries to charge and re-check if necessary.  We are an interstate Battery Dealer, offering both Cranking & Deep Cycle Battery options to meet your needs if Battery Replacement is required.

Boat Launch/Haul-Out Service

Being located on the Ashley River, we offer haul out service when we work on your boat. This means that there is no need to hassle with your trailer if you keep your boat in a marina or on a lift. Please call ahead to determine our haul out limitations and to get a quote for this service.

Electrical Repair & Installation

At Duncan’s Boats we provide services for Diagnosing & Repairing 12 Volt DC systems.  We don’t specialize in complete rewiring of boats and certain AC systems.  If the repair is beyond our normal scope of work, we can provide recommendations on who to use.

Outboard Annual Maintenance

We are authorized dealers who specialize in Preventative Maintenance Services on Yamaha and Mercury outboards.  The dealer advantage of hooking up Mercury and Yamaha Diagnostic software to pull hours, check for trouble codes, and assess the state of engine health during your annual preventative maintenance allows us to catch issues before they become problems(often during your standard warranty period)

From Yearly(100 Hour) Fluid/Filter change services, Comprehensive(300 Hour) Services including water pumps, ignition tune-ups, & cooling system component replacement.

I/O and Stern Drive Annual Service

We are authorized dealers who specialize in Preventative Maintenance Services on Volvo Penta & MerCruiser Sterndrives.  The dealer advantage of hooking up Volvo Penta & MerCruiser Diagnostic software to pull hours, check for trouble codes, and assess the state of engine health during your annual preventative maintenance allows us to catch issues before they become problems(often during your standard warranty period).

From Yearly(100 Hour) Fluid/Filter change services, Comprehensive(300 Hour) Services including water pumps, ignition tune-ups, & cooling system component replacement.

Shrink Wrapping

For Winter Season Protection, Shrink wrap is the best means of protecting your boat from the snow and ice during those long, cold, and windy winter months. It’ll keep your boat warm when the sun shines and dry on even the worst of days.  Contact us for a quote on shrink wrapping your boat today.

Spring Start-Up

Many boats don’t get much use during the winter holiday season.  We offer a spring start up service where we will assess the condition of the boat systems, engine running condition, and river test the boat to catch any issues before the first trip out with friends and family.  Contact us for Spring Start Up Services today.

Winterization- I/O and Stern Drives

Unlike outboard motors, the cooling passages in Sterndrive Motors are horizontal. This doesn’t promote natural draining of the cooling system when trimmed down. We recommend running antifreeze through the motor to provide freeze protection during harsh winter months.

Fuel systems not being used over several months have the potential to build up varnish & corrosion inside the lines. Injectors sitting static also have the potential to stick. Our mixture run through the fuel system helps prevent both of these from occurring.

Basic Turnkey Sterndrive Winterization

“TURNKEY” WINTERIZE STERNDRIVE ENGINE & FUEL SYSTEM
***TO PREPARE FOR SPRING TIME USE, SIMPLY RECONNECT THE NEGATIVE SIDE BATTERY TERMINAL AND RUN UP TO OPERATING TEMPERATURE ON HOSE CHECKING FOR ANY LEAKS OR ABNORMALITIES BEFORE FIRST USE***
-TREAT THE FUEL TANK WITH QUICKSTORE FUEL STABILIZER
-DRAIN BLOCK
-RUN PROPYLENE GLYCOL ANTIFREEZE THROUGH THE ENGINE COOLING PASSAGES
-HOOK UP SHOP FUEL TANK, RUN STABILIZE MIXTURE THROUGH THE FUEL SYSTEM
-DISCONNECT NEGATIVE SIDE TERMINAL OF BATTERY AND ZIP TIE TO BATTERY HANDLE(THIS APPLIES ONLY TO TRAILERED BOATS, ALL DRYSTACK BOATS LEAVE TERMINALS CONNECTED, MAKE SURE BATTERY SWITCH IS SHUT OFF AFTER SERVICE)
-APPLY CORROSION PRORECTION SPRAY TO ENGINE, & TRIM PUMP ASSEMBLIES
-CHECK FOR WATER IN THE GEARLUBE
-BAG THE DRIVE[EXCEPT FOR A DRYSTACK BOAT]
***CHECK TO MAKE SURE THERE ARE NO OTHER SYSTEM THAT NEED TO BE WINTERIZED***

*In addition, many sterndrive boats come with additional Freshwater, Generator, or Head Systems that also need attention.

Winterization- Outboards

Outboards with self draining cooling systems don’t have as many concerns for freeze damage as I/O and Sterndrive counterparts.  There are however many off season storage considerations.  The boat fuel tank must be treated & outboard fuel system treated to prevent seizing of fuel injection components from lack of use.  Carbureted outboards must be treated to prevent internal components from sticking and fuel phase separating, leading to costly repairs down the road.

Parts & Accessories

Since Duncan’s Boats is a certified dealer for Mercury Outboard, Mercury Mercruiser, Yamaha, and Volvo Penta, we carry genuine OEM parts for your marine engine. We also carry all the boating accessories you need to have great day on the water. From the safety equipment you need to all the toys you want. If we don’t have it in stock, we can generally get it for you within one day.

Having been a dealer for nearly fifty years, you can trust our expertise in helping you find the right parts and accessories. If you need anything for your boat just come in or give us a call and we will be happy to help you out.

Maintenance Parts:
We carry all the OEM parts you need to keep you motor running like it should. We keep the most common maintenance parts in stock including ignition parts, water pumps, fuel filters, oils and lubes, oil filters, drive gaskets and more.

Engine Parts:
If you have parts you need to replace on your motor come by or give us a call. Being a certified dealer we have the ability and a knowledgeable staff to look up the exact parts you need at fair prices. Always have your engine serial number handy so that we can find the correct part for you quickly.

Safety Equipment:
We keep all the safety equipment you need to have peace of mind on the water as well as be legal. We have life jackets, flares, fire extinguishers, horns, throw-able floating device and more.

Cleaning supplies:
We have all the products you need to make you boat shine and keep it looking great! We carry marine friendly soaps, waxes, vinyl cleaners and protectants. From bow to stern if it’s dirty we have the product to make it clean again.

Boating accessories:
We carry the items that you need to enjoy your time on the water. We have a good selection of dock lines, fenders, anchors, drain plugs and much more. We also get you all the other extra things that you want for your boat from a new stereo to LED lighting and more!