Regardless of how adept you are at routine repairs and maintenance work, the time will come when you need the services of a marine mechanic or carpenter. Don't wait for a breakdown! The best time to find a good technician is before an emergency occurs.
If your boat and engine are still covered by the manufacturers' warranties, your local dealer will be your first stop. Even if the problem isn't covered by warranty, it's a good idea to discuss the problem with the dealer because work done by a non-dealer might void the warranty. If warranties aren't an issue, ask boat-owning friends or consult with a local marine surveyor to get recommendations for a carpenter, marine electrician, and engine mechanic. A GOOD repair shop will make life easier, even if your boat can't be moved from its berth. Talk with the technician beforehand to get an idea of labor rates, travel charges, and other considerations.