What is the proper break-in procedure for 2-cycle, 4-cycle, and OptiMax outboards?
Break-in is important to insure correct engine performance and life. Follow the procedure listed in the Operation, Maintenance and Warranty Manual. Generally, for the first two hours, we recommend avoiding extended periods of idle, sustained periods of wide open throttle and holding the engine at one speed for extended periods of time. New two-stroke engines require additional oil, either through the addition of oil with the fuel or programming inside the computer. Four stroke models: DO NOT require additional oil added with the fuel during break-in. Break-in procedures are described in the Operation, Maintenance and Warranty Manual supplied with each engine. Use the Bookshelf link on the Mercury Dockstore page if you need to place an order for a replacement manual.
