Once you decide that new engines are the best way to go, complete this checklist before completing the job.
1. Get a list of half a dozen similar repowering jobs recently performed by the yard, including customer names and phone numbers.
2. Call these people to determine their satisfaction level.If you're converting from older, heavy diesel engines to new, lighter diesel engines or to gas, your boat's center of gravity will change, which could cause handling problems.
3. Contact the boat's manufacturer to see if it has any data on similar changes or have the plan reviewed by a naval architect.
4. If you're increasing horsepower, you may need structural changes to increase airflow in addition to new shafts and struts. Again, get expert opinions and have the yard include any such requirements in its quotes.
5. Will a larger engine or engines leave room for access once installed? Make sure to map this out before you start.
6. Can your existing electrical and gauge systems handle the requirements for the new engine? You may want to consider replacing the gauges with an engine monitoring system to take advantage of the new engine's technology.
7. Will your existing controls be compatible with your new engines? It may be necessary to install new controls.
8. If you're converting from gas to diesel, you'll face additional costs of fuel tank modifications for return lines and valves. Galvanized steel fuel intakes shouldn't be used with diesel fuel.