One of the best ways to troubleshoot an engine vibration problem is to simply replace the entire propeller. Doing so can tell you immediately if it is the propeller that is causing the problematic vibration you are feeling. Run the engine with a new propeller to see if the vibration has stopped, and if it hasn't, it is time to bring it in for repair.
One reason why propeller shaft breakage is so common on today’s boats is that many are constructed of low-grade stainless steel (made of lesser alloys). All it takes is for a tiny pit of corrosion to form on a shaft to initiate the crevice/stress corrosion cycle that will ultimately result in fatigue failure.
Worn-down isolation mounts on a boat, which are designed to absorb engine vibration and provide a smoother ride, can cause needless vibration to occur. Engine vibration will only worsen if these mounts are broken or loose. Remove the cover plates to see if this is the problem, and if it is, the boat needs to be brought in for repairs.
Water, whether fresh or saltwater, will wreak havoc on your boat’s electrical systems, as it will cause corrosion, and your system will short out, or connections will fail. When electrically dependent equipment works erratically or does not work at all, it is time to have it repaired.
Your boat's bilge pump is probably the most important safety device you can have. After all, the pump will ensure that your boat will not sink if it takes on water. Checking the functionality of the pump, as well as the batteries, is very important.
It’s a good idea to have your boat regularly inspected to make sure that it’s seaworthy. This includes inspection of the panels, floorboards, hatch covers, and electrical panel, as well as hidden components.
