Clean and test the engine.
Follow the manufacturer’s recommendations, but in general, change the oil and fluids, flush the engine with freshwater, clean the bilge, check the belts and hoses for dry rot, and test the battery.
Look while waxing.
As you protect the exterior with a new coat of wax, check that the hatches, railings and deck fittings are secure,and look for hull damage.
Inspect your safety gear.
Outdated flares, threadbare life jackets, a half-empty first aid kit, and a radio with dead batteries won’t help anyone in an emergency.
Check the trailer.
The lights, brakes and wheel bearings should all be inspected, along with support bunks, rollers and straps. Really look at the tires, including the spare, for cracks – caused by exposure and non-use – and for low pressure – a leading cause of failure.
Don’t do a Gilligan.
After everything is ready, make sure the drain plug is replaced and tightened.