Hello all. This afternoon we took a nice cruise. Everything was fine. After lunch I started the boat and all seemed ok. After untying the boat I put the port engine into foward and NOTHING.. Reverse worked. Starboard engine ok. Turned the engines off and restarted them. All ok!! Any ideas. Ps. I didn't have a chance to check the oil levels but they were just changed and see no sign of leaks. Thanks.